Improved metrics (#240)

Added db metrics (kvdb_bytes_read, kvdb_bytes_written, kvdb_reads, kvdb_writes)
Added --metrics-prefix=[prefix]

Cargo.lock

@@ -1073,6 +1073,7 @@ dependencies = [
  "rlp_compress",
  "rlp_derive",
  "rustc-hex 1.0.0",
+ "stats",
  "tempdir",
  "triehash-ethereum",
 ]
@@ -1123,9 +1124,12 @@ dependencies = [
  "ethereum-types 0.4.2",
  "heapsize",
  "kvdb",
+ "kvdb-memorydb",
+ "kvdb-rocksdb",
  "parking_lot 0.7.1",
  "rlp 0.3.0",
  "rlp_derive",
+ "stats",
 ]
 
 [[package]]
@@ -2154,6 +2158,7 @@ name = "journaldb"
 version = "0.2.0"
 dependencies = [
  "env_logger",
+ "ethcore-db",
  "ethereum-types 0.4.2",
  "fastmap",
  "hash-db",
@@ -2986,6 +2991,7 @@ name = "parity-local-store"
 version = "0.1.0"
 dependencies = [
  "common-types",
+ "ethcore-db",
  "ethcore-io",
  "ethkey",
  "kvdb",

bin/oe/cli/mod.rs

@@ -475,6 +475,10 @@ usage! {
             "--metrics",
             "Enable prometheus metrics (only full client).",
 
+            ARG arg_metrics_prefix: (String) = "", or |c: &Config| c.metrics.as_ref()?.prefix.clone(),
+            "--metrics-prefix=[prefix]",
+            "Prepend the specified prefix to the exported metrics names.",
+
             ARG arg_metrics_port: (u16) = 3000u16, or |c: &Config| c.metrics.as_ref()?.port.clone(),
             "--metrics-port=[PORT]",
             "Specify the port portion of the metrics server.",
@@ -922,6 +926,7 @@ struct Ipc {
 #[serde(deny_unknown_fields)]
 struct Metrics {
     enable: Option<bool>,
+    prefix: Option<String>,
     port: Option<u16>,
     interface: Option<String>,
 }
@@ -1338,6 +1343,7 @@ mod tests {
 
                 // METRICS
                 flag_metrics: false,
+                arg_metrics_prefix: "".into(),
                 arg_metrics_port: 3000u16,
                 arg_metrics_interface: "local".into(),
 
@@ -1542,6 +1548,7 @@ mod tests {
                 }),
                 metrics: Some(Metrics {
                     enable: Some(true),
+                    prefix: Some("oe".to_string()),
                     interface: Some("local".to_string()),
                     port: Some(4000),
                 }),

bin/oe/cli/tests/config.toml

@@ -36,7 +36,7 @@ apis = ["rpc", "eth"]
 enable = true
 interface = "local"
 port = 4000
-
+prefix = "oe"
 
 [secretstore]
 http_port = 8082

bin/oe/configuration.rs

@@ -958,6 +958,7 @@ impl Configuration {
     fn metrics_config(&self) -> Result<MetricsConfiguration, String> {
         let conf = MetricsConfiguration {
             enabled: self.metrics_enabled(),
+            prefix: self.metrics_prefix(),
             interface: self.metrics_interface(),
             port: self.args.arg_ports_shift + self.args.arg_metrics_port,
         };
@@ -1147,6 +1148,10 @@ impl Configuration {
         self.args.flag_metrics
     }
 
+    fn metrics_prefix(&self) -> String {
+        self.args.arg_metrics_prefix.clone()
+    }
+
     fn secretstore_enabled(&self) -> bool {
         !self.args.flag_no_secretstore && cfg!(feature = "secretstore")
     }

bin/oe/db/rocksdb/mod.rs

@@ -24,7 +24,8 @@ use self::{
 };
 use blooms_db;
 use ethcore::client::ClientConfig;
-use kvdb::KeyValueDB;
+use ethcore_db::KeyValueDB;
+use stats::PrometheusMetrics;
 use std::{fs, io, path::Path, sync::Arc};
 
 mod blooms;
@@ -53,6 +54,10 @@ impl BlockChainDB for AppDB {
     }
 }
 
+impl PrometheusMetrics for AppDB {
+    fn prometheus_metrics(&self, _: &mut stats::PrometheusRegistry) {}
+}
+
 /// Open a secret store DB using the given secret store data path. The DB path is one level beneath the data path.
 #[cfg(feature = "secretstore")]
 pub fn open_secretstore_db(data_path: &str) -> Result<Arc<dyn KeyValueDB>, String> {
@@ -101,8 +106,11 @@ pub fn open_database(
     fs::create_dir_all(&blooms_path)?;
     fs::create_dir_all(&trace_blooms_path)?;
 
+    let db = Database::open(&config, client_path)?;
+    let db_with_metrics = ethcore_db::DatabaseWithMetrics::new(db);
+
     let db = AppDB {
-        key_value: Arc::new(Database::open(&config, client_path)?),
+        key_value: Arc::new(db_with_metrics),
         blooms: blooms_db::Database::open(blooms_path)?,
         trace_blooms: blooms_db::Database::open(trace_blooms_path)?,
     };

bin/oe/metrics.rs

@@ -8,13 +8,15 @@ use hyper::{service::service_fn_ok, Body, Method, Request, Response, Server, Sta
 
 use stats::{
     prometheus::{self, Encoder},
-    prometheus_gauge, PrometheusMetrics,
+    PrometheusMetrics, PrometheusRegistry,
 };
 
 #[derive(Debug, Clone, PartialEq)]
 pub struct MetricsConfiguration {
     /// Are metrics enabled (default is false)?
     pub enabled: bool,
+    /// Prefix
+    pub prefix: String,
     /// The IP of the network interface used (default is 127.0.0.1).
     pub interface: String,
     /// The network port (default is 3000).
@@ -25,6 +27,7 @@ impl Default for MetricsConfiguration {
     fn default() -> Self {
         MetricsConfiguration {
             enabled: false,
+            prefix: "".into(),
             interface: "127.0.0.1".into(),
             port: 3000,
         }
@@ -35,19 +38,22 @@ struct State {
     rpc_apis: Arc<rpc_apis::FullDependencies>,
 }
 
-fn handle_request(req: Request<Body>, state: Arc<Mutex<State>>) -> Response<Body> {
+fn handle_request(
+    req: Request<Body>,
+    conf: Arc<MetricsConfiguration>,
+    state: Arc<Mutex<State>>,
+) -> Response<Body> {
     let (parts, _body) = req.into_parts();
     match (parts.method, parts.uri.path()) {
         (Method::GET, "/metrics") => {
             let start = Instant::now();
 
-            let mut reg = prometheus::Registry::new();
+            let mut reg = PrometheusRegistry::new(conf.prefix.clone());
             let state = state.lock();
             state.rpc_apis.client.prometheus_metrics(&mut reg);
             state.rpc_apis.sync.prometheus_metrics(&mut reg);
             let elapsed = start.elapsed();
-            prometheus_gauge(
+            reg.register_gauge(
-                &mut reg,
                 "metrics_time",
                 "Time to perform rpc metrics",
                 elapsed.as_millis() as i64,
@@ -55,7 +61,7 @@ fn handle_request(req: Request<Body>, state: Arc<Mutex<State>>) -> Response<Body
 
             let mut buffer = vec![];
             let encoder = prometheus::TextEncoder::new();
-            let metric_families = reg.gather();
+            let metric_families = reg.registry().gather();
 
             encoder
                 .encode(&metric_families, &mut buffer)
@@ -90,17 +96,20 @@ pub fn start_prometheus_metrics(
         rpc_apis: deps.apis.clone(),
     };
     let state = Arc::new(Mutex::new(state));
-
+    let conf = Arc::new(conf.to_owned());
     let server = Server::bind(&addr)
         .serve(move || {
             // This is the `Service` that will handle the connection.
             // `service_fn_ok` is a helper to convert a function that
             // returns a Response into a `Service`.
             let state = state.clone();
-            service_fn_ok(move |req: Request<Body>| handle_request(req, state.clone()))
+            let conf = conf.clone();
+            service_fn_ok(move |req: Request<Body>| {
+                handle_request(req, conf.clone(), state.clone())
+            })
         })
         .map_err(|e| eprintln!("server error: {}", e));
-    println!("Listening on http://{}", addr);
+    info!("Started prometeus metrics at http://{}/metrics", addr);
 
     deps.executor.spawn(server);
 

crates/concensus/miner/local-store/Cargo.toml

@@ -7,6 +7,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 common-types = { path = "../../../ethcore/types" }
 ethcore-io = { path = "../../../runtime/io" }
+ethcore-db = { path = "../../../db/db"}
 kvdb = "0.1"
 log = "0.4"
 rlp = { version = "0.3.0", features = ["ethereum"] }

crates/concensus/miner/local-store/src/lib.rs

@@ -18,14 +18,15 @@
 
 use std::{fmt, sync::Arc, time::Duration};
 
+use ethcore_db::KeyValueDB;
 use io::IoHandler;
-use kvdb::KeyValueDB;
 use types::transaction::{
     Condition as TransactionCondition, PendingTransaction, SignedTransaction, TypedTransaction,
     UnverifiedTransaction,
 };
 
 extern crate common_types as types;
+extern crate ethcore_db;
 extern crate ethcore_io as io;
 extern crate kvdb;
 extern crate rlp;
@@ -253,7 +254,7 @@ mod tests {
 
     #[test]
     fn twice_empty() {
-        let db = Arc::new(::kvdb_memorydb::create(0));
+        let db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         {
             let store = super::create(db.clone(), None, Dummy(vec![]));
@@ -284,7 +285,7 @@ mod tests {
             })
             .collect();
 
-        let db = Arc::new(::kvdb_memorydb::create(0));
+        let db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         {
             // nothing written yet, will write pending.
@@ -325,7 +326,7 @@ mod tests {
             PendingTransaction::new(signed, None)
         });
 
-        let db = Arc::new(::kvdb_memorydb::create(0));
+        let db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         {
             // nothing written, will write bad.
             let store = super::create(db.clone(), None, Dummy(transactions.clone()));

crates/db/db/Cargo.toml

@@ -12,6 +12,9 @@ common-types = { path = "../../ethcore/types" }
 ethereum-types = "0.4"
 heapsize = "0.4"
 kvdb = "0.1"
+kvdb-rocksdb = "0.1.3"
+kvdb-memorydb = "0.1"
 parking_lot = "0.7"
 rlp = { version = "0.3.0", features = ["ethereum"] }
 rlp_derive = { path = "../../util/rlp-derive" }
+stats = { path = "../../util/stats" }

crates/db/db/src/db.rs

@@ -16,9 +16,11 @@
 
 //! Database utilities and definitions.
 
-use kvdb::{DBTransaction, KeyValueDB};
+use kvdb::DBTransaction;
+use kvdb_rocksdb::Database;
 use parking_lot::RwLock;
-use std::{collections::HashMap, hash::Hash, ops::Deref};
+use stats::{PrometheusMetrics, PrometheusRegistry};
+use std::{collections::HashMap, hash::Hash, io::Read, ops::Deref};
 
 use rlp;
 
@@ -282,7 +284,7 @@ impl Writable for DBTransaction {
     }
 }
 
-impl<KVDB: KeyValueDB + ?Sized> Readable for KVDB {
+impl<KVDB: kvdb::KeyValueDB + ?Sized> Readable for KVDB {
     fn read<T, R>(&self, col: Option<u32>, key: &dyn Key<T, Target = R>) -> Option<T>
     where
         T: rlp::Decodable,
@@ -311,3 +313,197 @@ impl<KVDB: KeyValueDB + ?Sized> Readable for KVDB {
         }
     }
 }
+
+/// Database with enabled statistics
+pub struct DatabaseWithMetrics {
+    db: Database,
+    reads: std::sync::atomic::AtomicI64,
+    writes: std::sync::atomic::AtomicI64,
+    bytes_read: std::sync::atomic::AtomicI64,
+    bytes_written: std::sync::atomic::AtomicI64,
+}
+
+impl DatabaseWithMetrics {
+    /// Create a new instance
+    pub fn new(db: Database) -> Self {
+        Self {
+            db,
+            reads: std::sync::atomic::AtomicI64::new(0),
+            writes: std::sync::atomic::AtomicI64::new(0),
+            bytes_read: std::sync::atomic::AtomicI64::new(0),
+            bytes_written: std::sync::atomic::AtomicI64::new(0),
+        }
+    }
+}
+
+/// Ethcore definition of a KeyValueDB with embeeded metrics
+pub trait KeyValueDB: kvdb::KeyValueDB + PrometheusMetrics {}
+
+impl kvdb::KeyValueDB for DatabaseWithMetrics {
+    fn get(&self, col: Option<u32>, key: &[u8]) -> std::io::Result<Option<kvdb::DBValue>> {
+        let res = self.db.get(col, key);
+        let count = res
+            .as_ref()
+            .map_or(0, |y| y.as_ref().map_or(0, |x| x.bytes().count()));
+
+        self.reads
+            .fetch_add(1, std::sync::atomic::Ordering::Relaxed);
+        self.bytes_read
+            .fetch_add(count as i64, std::sync::atomic::Ordering::Relaxed);
+
+        res
+    }
+    fn get_by_prefix(&self, col: Option<u32>, prefix: &[u8]) -> Option<Box<[u8]>> {
+        let res = self.db.get_by_prefix(col, prefix);
+        let count = res.as_ref().map_or(0, |x| x.bytes().count());
+
+        self.reads
+            .fetch_add(1, std::sync::atomic::Ordering::Relaxed);
+        self.bytes_read
+            .fetch_add(count as i64, std::sync::atomic::Ordering::Relaxed);
+
+        res
+    }
+    fn write_buffered(&self, transaction: DBTransaction) {
+        let mut count = 0;
+        for op in &transaction.ops {
+            count += match op {
+                kvdb::DBOp::Insert { value, .. } => value.bytes().count(),
+                _ => 0,
+            };
+        }
+
+        self.writes.fetch_add(
+            transaction.ops.len() as i64,
+            std::sync::atomic::Ordering::Relaxed,
+        );
+        self.bytes_written
+            .fetch_add(count as i64, std::sync::atomic::Ordering::Relaxed);
+
+        self.db.write_buffered(transaction)
+    }
+    fn write(&self, transaction: DBTransaction) -> std::io::Result<()> {
+        let mut count = 0;
+        for op in &transaction.ops {
+            count += match op {
+                kvdb::DBOp::Insert { value, .. } => value.bytes().count(),
+                _ => 0,
+            };
+        }
+
+        self.bytes_written
+            .fetch_add(count as i64, std::sync::atomic::Ordering::Relaxed);
+        self.writes.fetch_add(
+            transaction.ops.len() as i64,
+            std::sync::atomic::Ordering::Relaxed,
+        );
+        self.db.write(transaction)
+    }
+    fn flush(&self) -> std::io::Result<()> {
+        self.db.flush()
+    }
+
+    fn iter<'a>(
+        &'a self,
+        col: Option<u32>,
+    ) -> Box<(dyn Iterator<Item = (Box<[u8]>, Box<[u8]>)> + 'a)> {
+        kvdb::KeyValueDB::iter(&self.db, col)
+    }
+
+    fn iter_from_prefix<'a>(
+        &'a self,
+        col: Option<u32>,
+        prefix: &'a [u8],
+    ) -> Box<dyn Iterator<Item = (Box<[u8]>, Box<[u8]>)> + 'a> {
+        self.db.iter_from_prefix(col, prefix)
+    }
+
+    fn restore(&self, new_db: &str) -> std::io::Result<()> {
+        self.db.restore(new_db)
+    }
+}
+
+impl KeyValueDB for DatabaseWithMetrics {}
+
+impl PrometheusMetrics for DatabaseWithMetrics {
+    fn prometheus_metrics(&self, p: &mut PrometheusRegistry) {
+        p.register_counter(
+            "kvdb_reads",
+            "db reads",
+            self.reads.load(std::sync::atomic::Ordering::Relaxed) as i64,
+        );
+        p.register_counter(
+            "kvdb_writes",
+            "db writes",
+            self.writes.load(std::sync::atomic::Ordering::Relaxed) as i64,
+        );
+        p.register_counter(
+            "kvdb_bytes_read",
+            "db bytes_reads",
+            self.bytes_read.load(std::sync::atomic::Ordering::Relaxed) as i64,
+        );
+        p.register_counter(
+            "kvdb_bytes_written",
+            "db bytes_written",
+            self.bytes_written
+                .load(std::sync::atomic::Ordering::Relaxed) as i64,
+        );
+    }
+}
+
+/// InMemory with disabled statistics
+pub struct InMemoryWithMetrics {
+    db: kvdb_memorydb::InMemory,
+}
+
+impl kvdb::KeyValueDB for InMemoryWithMetrics {
+    fn get(&self, col: Option<u32>, key: &[u8]) -> std::io::Result<Option<kvdb::DBValue>> {
+        self.db.get(col, key)
+    }
+    fn get_by_prefix(&self, col: Option<u32>, prefix: &[u8]) -> Option<Box<[u8]>> {
+        self.db.get_by_prefix(col, prefix)
+    }
+    fn write_buffered(&self, transaction: DBTransaction) {
+        self.db.write_buffered(transaction)
+    }
+    fn write(&self, transaction: DBTransaction) -> std::io::Result<()> {
+        self.db.write(transaction)
+    }
+    fn flush(&self) -> std::io::Result<()> {
+        self.db.flush()
+    }
+
+    fn iter<'a>(
+        &'a self,
+        col: Option<u32>,
+    ) -> Box<(dyn Iterator<Item = (Box<[u8]>, Box<[u8]>)> + 'a)> {
+        kvdb::KeyValueDB::iter(&self.db, col)
+    }
+
+    fn iter_from_prefix<'a>(
+        &'a self,
+        col: Option<u32>,
+        prefix: &'a [u8],
+    ) -> Box<dyn Iterator<Item = (Box<[u8]>, Box<[u8]>)> + 'a> {
+        self.db.iter_from_prefix(col, prefix)
+    }
+
+    fn restore(&self, new_db: &str) -> std::io::Result<()> {
+        self.db.restore(new_db)
+    }
+}
+
+impl PrometheusMetrics for InMemoryWithMetrics {
+    fn prometheus_metrics(&self, _: &mut PrometheusRegistry) {}
+}
+
+impl KeyValueDB for InMemoryWithMetrics {}
+
+impl InMemoryWithMetrics {
+    /// Create new instance
+    pub fn create(num_cols: u32) -> Self {
+        Self {
+            db: kvdb_memorydb::create(num_cols),
+        }
+    }
+}

crates/db/db/src/lib.rs

@@ -22,5 +22,6 @@ mod db;
 
 pub mod cache_manager;
 pub mod keys;
+pub use kvdb::{DBTransaction, DBValue};
 
 pub use self::db::*;

crates/db/journaldb/Cargo.toml

@@ -11,6 +11,7 @@ ethereum-types = "0.4"
 hash-db = "0.11.0"
 heapsize = "0.4"
 keccak-hasher = { path = "../../util/keccak-hasher" }
+ethcore-db = { path = "../../db/db"}
 kvdb = "0.1"
 log = "0.4"
 memory-db = { path = "../memory-db" }

crates/db/journaldb/src/archivedb.rs

@@ -25,10 +25,10 @@ use std::{
 use super::{
     error_key_already_exists, error_negatively_reference_hash, memory_db::*, LATEST_ERA_KEY,
 };
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use hash_db::HashDB;
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use rlp::{decode, encode};
 use traits::JournalDB;
 
@@ -222,13 +222,12 @@ mod tests {
     use super::*;
     use hash_db::HashDB;
     use keccak::keccak;
-    use kvdb_memorydb;
     use JournalDB;
 
     #[test]
     fn insert_same_in_fork() {
         // history is 1
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
 
         let x = jdb.insert(b"X");
         jdb.commit_batch(1, &keccak(b"1"), None).unwrap();
@@ -256,7 +255,7 @@ mod tests {
     #[test]
     fn long_history() {
         // history is 3
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
         let h = jdb.insert(b"foo");
         jdb.commit_batch(0, &keccak(b"0"), None).unwrap();
         assert!(jdb.contains(&h));
@@ -276,7 +275,7 @@ mod tests {
     #[test]
     #[should_panic]
     fn multiple_owed_removal_not_allowed() {
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
         let h = jdb.insert(b"foo");
         jdb.commit_batch(0, &keccak(b"0"), None).unwrap();
         assert!(jdb.contains(&h));
@@ -290,7 +289,7 @@ mod tests {
     #[test]
     fn complex() {
         // history is 1
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
 
         let foo = jdb.insert(b"foo");
         let bar = jdb.insert(b"bar");
@@ -326,7 +325,7 @@ mod tests {
     #[test]
     fn fork() {
         // history is 1
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
 
         let foo = jdb.insert(b"foo");
         let bar = jdb.insert(b"bar");
@@ -355,7 +354,7 @@ mod tests {
     #[test]
     fn overwrite() {
         // history is 1
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
 
         let foo = jdb.insert(b"foo");
         jdb.commit_batch(0, &keccak(b"0"), None).unwrap();
@@ -377,7 +376,7 @@ mod tests {
     #[test]
     fn fork_same_key() {
         // history is 1
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
         jdb.commit_batch(0, &keccak(b"0"), None).unwrap();
 
         let foo = jdb.insert(b"foo");
@@ -396,7 +395,7 @@ mod tests {
 
     #[test]
     fn reopen() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let bar = H256::random();
 
         let foo = {
@@ -426,7 +425,7 @@ mod tests {
 
     #[test]
     fn reopen_remove() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         let foo = {
             let mut jdb = ArchiveDB::new(shared_db.clone(), None);
@@ -460,7 +459,7 @@ mod tests {
 
     #[test]
     fn reopen_fork() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let (foo, _, _) = {
             let mut jdb = ArchiveDB::new(shared_db.clone(), None);
             // history is 1
@@ -488,7 +487,7 @@ mod tests {
 
     #[test]
     fn inject() {
-        let mut jdb = ArchiveDB::new(Arc::new(kvdb_memorydb::create(0)), None);
+        let mut jdb = ArchiveDB::new(Arc::new(ethcore_db::InMemoryWithMetrics::create(0)), None);
         let key = jdb.insert(b"dog");
         jdb.inject_batch().unwrap();
 

crates/db/journaldb/src/earlymergedb.rs

@@ -26,11 +26,11 @@ use super::{
     error_key_already_exists, error_negatively_reference_hash, traits::JournalDB, LATEST_ERA_KEY,
 };
 use bytes::Bytes;
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use hash_db::HashDB;
 use heapsize::HeapSizeOf;
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use memory_db::*;
 use parking_lot::RwLock;
 use rlp::{decode, encode};
@@ -622,7 +622,6 @@ mod tests {
     use super::{super::traits::JournalDB, *};
     use hash_db::HashDB;
     use keccak::keccak;
-    use kvdb_memorydb;
 
     #[test]
     fn insert_same_in_fork() {
@@ -913,13 +912,13 @@ mod tests {
     }
 
     fn new_db() -> EarlyMergeDB {
-        let backing = Arc::new(kvdb_memorydb::create(0));
+        let backing = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         EarlyMergeDB::new(backing, None)
     }
 
     #[test]
     fn reopen() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let bar = H256::random();
 
         let foo = {
@@ -1105,7 +1104,7 @@ mod tests {
     fn reopen_remove_three() {
         let _ = ::env_logger::try_init();
 
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let foo = keccak(b"foo");
 
         {
@@ -1166,7 +1165,7 @@ mod tests {
 
     #[test]
     fn reopen_fork() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         let (foo, bar, baz) = {
             let mut jdb = EarlyMergeDB::new(shared_db.clone(), None);

crates/db/journaldb/src/lib.rs

@@ -20,6 +20,7 @@ extern crate heapsize;
 #[macro_use]
 extern crate log;
 
+extern crate ethcore_db;
 extern crate ethereum_types;
 extern crate fastmap;
 extern crate hash_db;
@@ -147,7 +148,7 @@ impl fmt::Display for Algorithm {
 
 /// Create a new `JournalDB` trait object over a generic key-value database.
 pub fn new(
-    backing: Arc<dyn kvdb::KeyValueDB>,
+    backing: Arc<dyn ethcore_db::KeyValueDB>,
     algorithm: Algorithm,
     col: Option<u32>,
 ) -> Box<dyn JournalDB> {

crates/db/journaldb/src/overlaydb.rs

@@ -23,10 +23,10 @@ use std::{
 };
 
 use super::error_negatively_reference_hash;
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use hash_db::HashDB;
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use memory_db::*;
 use rlp::{decode, encode, Decodable, DecoderError, Encodable, Rlp, RlpStream};
 
@@ -88,7 +88,7 @@ impl OverlayDB {
     /// Create a new instance of OverlayDB with an anonymous temporary database.
     #[cfg(test)]
     pub fn new_temp() -> OverlayDB {
-        let backing = Arc::new(::kvdb_memorydb::create(0));
+        let backing = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         Self::new(backing, None)
     }
 

crates/db/journaldb/src/overlayrecentdb.rs

@@ -23,12 +23,12 @@ use std::{
 };
 
 use super::{error_negatively_reference_hash, JournalDB, DB_PREFIX_LEN, LATEST_ERA_KEY};
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use fastmap::H256FastMap;
 use hash_db::HashDB;
 use heapsize::HeapSizeOf;
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use memory_db::*;
 use parking_lot::RwLock;
 use rlp::{decode, encode, Decodable, DecoderError, Encodable, Rlp, RlpStream};
@@ -554,11 +554,10 @@ mod tests {
     use super::*;
     use hash_db::HashDB;
     use keccak::keccak;
-    use kvdb_memorydb;
     use JournalDB;
 
     fn new_db() -> OverlayRecentDB {
-        let backing = Arc::new(kvdb_memorydb::create(0));
+        let backing = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         OverlayRecentDB::new(backing, None)
     }
 
@@ -832,7 +831,7 @@ mod tests {
 
     #[test]
     fn reopen() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let bar = H256::random();
 
         let foo = {
@@ -1015,7 +1014,7 @@ mod tests {
     fn reopen_remove_three() {
         let _ = ::env_logger::try_init();
 
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         let foo = keccak(b"foo");
 
         {
@@ -1076,7 +1075,7 @@ mod tests {
 
     #[test]
     fn reopen_fork() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         let (foo, bar, baz) = {
             let mut jdb = OverlayRecentDB::new(shared_db.clone(), None);
@@ -1146,7 +1145,7 @@ mod tests {
 
     #[test]
     fn earliest_era() {
-        let shared_db = Arc::new(kvdb_memorydb::create(0));
+        let shared_db = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
 
         // empty DB
         let mut jdb = OverlayRecentDB::new(shared_db.clone(), None);

crates/db/journaldb/src/refcounteddb.rs

@@ -23,11 +23,11 @@ use std::{
 };
 
 use super::{traits::JournalDB, LATEST_ERA_KEY};
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use hash_db::HashDB;
 use heapsize::HeapSizeOf;
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use memory_db::MemoryDB;
 use overlaydb::OverlayDB;
 use rlp::{decode, encode};
@@ -252,11 +252,10 @@ mod tests {
     use super::*;
     use hash_db::HashDB;
     use keccak::keccak;
-    use kvdb_memorydb;
     use JournalDB;
 
     fn new_db() -> RefCountedDB {
-        let backing = Arc::new(kvdb_memorydb::create(0));
+        let backing = Arc::new(ethcore_db::InMemoryWithMetrics::create(0));
         RefCountedDB::new(backing, None)
     }
 

crates/db/journaldb/src/traits.rs

@@ -18,10 +18,10 @@
 
 use std::{io, sync::Arc};
 
+use ethcore_db::{DBTransaction, DBValue, KeyValueDB};
 use ethereum_types::H256;
 use hash_db::{AsHashDB, HashDB};
 use keccak_hasher::KeccakHasher;
-use kvdb::{self, DBTransaction, DBValue};
 use std::collections::{BTreeMap, HashMap};
 
 /// expose keys of a hashDB for debugging or tests (slow).
@@ -86,7 +86,7 @@ pub trait JournalDB: KeyedHashDB {
     }
 
     /// Get backing database.
-    fn backing(&self) -> &Arc<dyn kvdb::KeyValueDB>;
+    fn backing(&self) -> &Arc<dyn KeyValueDB>;
 
     /// Clear internal strucutres. This should called after changes have been written
     /// to the backing strage

crates/ethcore/blockchain/Cargo.toml

@@ -26,6 +26,7 @@ rlp = { version = "0.3.0", features = ["ethereum"] }
 rlp_compress = { path = "../../util/rlp-compress" }
 rlp_derive = { path = "../../util/rlp-derive" }
 triehash-ethereum = { version = "0.2",  path = "../../util/triehash-ethereum" }
+stats = { path = "../../util/stats" }
 
 [dev-dependencies]
 env_logger = "0.5"

crates/ethcore/blockchain/src/blockchain.rs

@@ -41,6 +41,7 @@ use common_types::{
     views::{BlockView, HeaderView},
     BlockNumber,
 };
+use db::{DBTransaction, KeyValueDB};
 use ethcore_db::{
     self as db,
     cache_manager::CacheManager,
@@ -50,13 +51,13 @@ use ethcore_db::{
 use ethereum_types::{Bloom, BloomRef, H256, U256};
 use heapsize::HeapSizeOf;
 use itertools::Itertools;
-use kvdb::{DBTransaction, KeyValueDB};
 use log::{info, trace, warn};
 use parity_bytes::Bytes;
 use parking_lot::{Mutex, RwLock};
 use rayon::prelude::*;
 use rlp::RlpStream;
 use rlp_compress::{blocks_swapper, compress, decompress};
+use stats::PrometheusMetrics;
 
 use crate::{
     best_block::{BestAncientBlock, BestBlock},
@@ -66,7 +67,7 @@ use crate::{
 };
 
 /// Database backing `BlockChain`.
-pub trait BlockChainDB: Send + Sync {
+pub trait BlockChainDB: Send + Sync + PrometheusMetrics {
     /// Generic key value store.
     fn key_value(&self) -> &Arc<dyn KeyValueDB>;
 
@@ -1950,6 +1951,9 @@ mod tests {
             &self.trace_blooms
         }
     }
+    impl PrometheusMetrics for TestBlockChainDB {
+        fn prometheus_metrics(&self, _: &mut stats::PrometheusRegistry) {}
+    }
 
     /// Creates new test instance of `BlockChainDB`
     pub fn new_db() -> Arc<dyn BlockChainDB> {
@@ -1961,7 +1965,9 @@ mod tests {
             trace_blooms: blooms_db::Database::open(trace_blooms_dir.path()).unwrap(),
             _blooms_dir: blooms_dir,
             _trace_blooms_dir: trace_blooms_dir,
-            key_value: Arc::new(kvdb_memorydb::create(ethcore_db::NUM_COLUMNS.unwrap())),
+            key_value: Arc::new(ethcore_db::InMemoryWithMetrics::create(
+                ethcore_db::NUM_COLUMNS.unwrap(),
+            )),
         };
 
         Arc::new(db)

crates/ethcore/src/client/client.rs

@@ -33,12 +33,12 @@ use blockchain::{
 };
 use bytes::{Bytes, ToPretty};
 use call_contract::CallContract;
+use db::{DBTransaction, DBValue, KeyValueDB};
 use error::Error;
 use ethcore_miner::pool::VerifiedTransaction;
 use ethereum_types::{Address, H256, H264, U256};
 use hash::keccak;
 use itertools::Itertools;
-use kvdb::{DBTransaction, DBValue, KeyValueDB};
 use parking_lot::{Mutex, RwLock};
 use rand::OsRng;
 use rlp::{PayloadInfo, Rlp};
@@ -88,7 +88,7 @@ use snapshot::{self, io as snapshot_io, SnapshotClient};
 use spec::Spec;
 use state::{self, State};
 use state_db::StateDB;
-use stats::{prometheus, prometheus_counter, prometheus_gauge, PrometheusMetrics};
+use stats::{PrometheusMetrics, PrometheusRegistry};
 use trace::{
     self, Database as TraceDatabase, ImportRequest as TraceImportRequest, LocalizedTrace, TraceDB,
 };
@@ -3236,41 +3236,36 @@ impl IoChannelQueue {
 }
 
 impl PrometheusMetrics for Client {
-    fn prometheus_metrics(&self, r: &mut prometheus::Registry) {
+    fn prometheus_metrics(&self, r: &mut PrometheusRegistry) {
         // gas, tx & blocks
         let report = self.report();
 
         for (key, value) in report.item_sizes.iter() {
-            prometheus_gauge(
+            r.register_gauge(
-                r,
                 &key,
                 format!("Total item number of {}", key).as_str(),
                 *value as i64,
             );
         }
 
-        prometheus_counter(
+        r.register_counter(
-            r,
             "import_gas",
             "Gas processed",
             report.gas_processed.as_u64() as i64,
         );
-        prometheus_counter(
+        r.register_counter(
-            r,
             "import_blocks",
             "Blocks imported",
             report.blocks_imported as i64,
         );
-        prometheus_counter(
+        r.register_counter(
-            r,
             "import_txs",
             "Transactions applied",
             report.transactions_applied as i64,
         );
 
         let state_db = self.state_db.read();
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "statedb_cache_size",
             "State DB cache size",
             state_db.cache_size() as i64,
@@ -3278,32 +3273,27 @@ impl PrometheusMetrics for Client {
 
         // blockchain cache
         let blockchain_cache_info = self.blockchain_cache_info();
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "blockchaincache_block_details",
             "BlockDetails cache size",
             blockchain_cache_info.block_details as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "blockchaincache_block_recipts",
             "Block receipts size",
             blockchain_cache_info.block_receipts as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "blockchaincache_blocks",
             "Blocks cache size",
             blockchain_cache_info.blocks as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "blockchaincache_txaddrs",
             "Transaction addresses cache size",
             blockchain_cache_info.transaction_addresses as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "blockchaincache_size",
             "Total blockchain cache size",
             blockchain_cache_info.total() as i64,
@@ -3321,22 +3311,19 @@ impl PrometheusMetrics for Client {
                     .map(|last| (first, U256::from(last)))
             });
         if let Some((first, last)) = gap {
-            prometheus_gauge(
+            r.register_gauge(
-                r,
                 "chain_warpsync_gap_first",
                 "Warp sync gap, first block",
                 first.as_u64() as i64,
             );
-            prometheus_gauge(
+            r.register_gauge(
-                r,
                 "chain_warpsync_gap_last",
                 "Warp sync gap, last block",
                 last.as_u64() as i64,
             );
         }
 
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "chain_block",
             "Best block number",
             chain.best_block_number as i64,
@@ -3344,14 +3331,12 @@ impl PrometheusMetrics for Client {
 
         // prunning info
         let prunning = self.pruning_info();
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "prunning_earliest_chain",
             "The first block which everything can be served after",
             prunning.earliest_chain as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "prunning_earliest_state",
             "The first block where state requests may be served",
             prunning.earliest_state as i64,
@@ -3359,36 +3344,34 @@ impl PrometheusMetrics for Client {
 
         // queue info
         let queue = self.queue_info();
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "queue_mem_used",
             "Queue heap memory used in bytes",
             queue.mem_used as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "queue_size_total",
             "The total size of the queues",
             queue.total_queue_size() as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "queue_size_unverified",
             "Number of queued items pending verification",
             queue.unverified_queue_size as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "queue_size_verified",
             "Number of verified queued items pending import",
             queue.verified_queue_size as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "queue_size_verifying",
             "Number of items being verified",
             queue.verifying_queue_size as i64,
         );
+
+        // database info
+        self.db.read().key_value().prometheus_metrics(r);
     }
 }
 

crates/ethcore/src/client/evm_test_client.rs

@@ -25,7 +25,6 @@ use executive;
 use factory::{self, Factories};
 use journaldb;
 use kvdb::{self, KeyValueDB};
-use kvdb_memorydb;
 use pod_state;
 use spec;
 use state;
@@ -181,7 +180,7 @@ impl<'a> EvmTestClient<'a> {
         spec: &'a spec::Spec,
         factories: &Factories,
     ) -> Result<state::State<state_db::StateDB>, EvmTestError> {
-        let db = Arc::new(kvdb_memorydb::create(
+        let db = Arc::new(ethcore_db::InMemoryWithMetrics::create(
             db::NUM_COLUMNS.expect("We use column-based DB; qed"),
         ));
         let journal_db =
@@ -211,7 +210,7 @@ impl<'a> EvmTestClient<'a> {
         factories: &Factories,
         pod_state: pod_state::PodState,
     ) -> Result<state::State<state_db::StateDB>, EvmTestError> {
-        let db = Arc::new(kvdb_memorydb::create(
+        let db = Arc::new(ethcore_db::InMemoryWithMetrics::create(
             db::NUM_COLUMNS.expect("We use column-based DB; qed"),
         ));
         let journal_db =

crates/ethcore/src/client/test_client.rs

@@ -34,7 +34,6 @@ use ethtrie;
 use hash::keccak;
 use itertools::Itertools;
 use kvdb::DBValue;
-use kvdb_memorydb;
 use parking_lot::RwLock;
 use rlp::RlpStream;
 use rustc_hex::FromHex;
@@ -75,7 +74,7 @@ use miner::{self, Miner, MinerService};
 use spec::Spec;
 use state::StateInfo;
 use state_db::StateDB;
-use stats::{prometheus, PrometheusMetrics};
+use stats::{PrometheusMetrics, PrometheusRegistry};
 use trace::LocalizedTrace;
 use verification::queue::{kind::blocks::Unverified, QueueInfo};
 
@@ -409,7 +408,7 @@ impl TestBlockChainClient {
 
 /// Get temporary db state1
 pub fn get_temp_state_db() -> StateDB {
-    let db = kvdb_memorydb::create(NUM_COLUMNS.unwrap_or(0));
+    let db = ethcore_db::InMemoryWithMetrics::create(NUM_COLUMNS.unwrap_or(0));
     let journal_db = journaldb::new(Arc::new(db), journaldb::Algorithm::EarlyMerge, COL_STATE);
     StateDB::new(journal_db, 1024 * 1024)
 }
@@ -1132,5 +1131,5 @@ impl super::traits::EngineClient for TestBlockChainClient {
 }
 
 impl PrometheusMetrics for TestBlockChainClient {
-    fn prometheus_metrics(&self, _r: &mut prometheus::Registry) {}
+    fn prometheus_metrics(&self, _r: &mut PrometheusRegistry) {}
 }

crates/ethcore/src/lib.rs

@@ -73,8 +73,6 @@ extern crate ethcore_accounts as accounts;
 extern crate ethcore_stratum;
 #[cfg(feature = "json-tests")]
 extern crate globset;
-#[cfg(any(test, feature = "test-helpers"))]
-extern crate kvdb_memorydb;
 #[cfg(any(test, feature = "kvdb-rocksdb"))]
 extern crate kvdb_rocksdb;
 #[cfg(test)]

crates/ethcore/src/snapshot/consensus/authority.rs

@@ -32,9 +32,9 @@ use snapshot::{Error, ManifestData, Progress};
 
 use blockchain::{BlockChain, BlockChainDB, BlockProvider};
 use bytes::Bytes;
+use db::KeyValueDB;
 use ethereum_types::{H256, U256};
 use itertools::{Itertools, Position};
-use kvdb::KeyValueDB;
 use rlp::{Rlp, RlpStream};
 use types::{
     encoded, header::Header, ids::BlockId, receipt::TypedReceipt, transaction::TypedTransaction,

crates/ethcore/src/snapshot/consensus/work.rs

@@ -32,9 +32,9 @@ use std::{
 
 use blockchain::{BlockChain, BlockChainDB, BlockProvider};
 use bytes::Bytes;
+use db::KeyValueDB;
 use engines::EthEngine;
 use ethereum_types::H256;
-use kvdb::KeyValueDB;
 use rand::OsRng;
 use rlp::{Rlp, RlpStream};
 use snapshot::{block::AbridgedBlock, Error, ManifestData, Progress};

crates/ethcore/src/snapshot/mod.rs

@@ -35,12 +35,12 @@ use engines::EthEngine;
 use types::{header::Header, ids::BlockId};
 
 use bytes::Bytes;
+use db::{DBValue, KeyValueDB};
 use ethereum_types::H256;
 use ethtrie::{TrieDB, TrieDBMut};
 use hash_db::HashDB;
 use journaldb::{self, Algorithm, JournalDB};
 use keccak_hasher::KeccakHasher;
-use kvdb::{DBValue, KeyValueDB};
 use num_cpus;
 use parking_lot::Mutex;
 use rlp::{Rlp, RlpStream};

crates/ethcore/src/snapshot/tests/state.rs

@@ -82,8 +82,11 @@ fn snap_and_restore() {
 
     let db_path = tempdir.path().join("db");
     let db = {
-        let new_db = Arc::new(Database::open(&db_cfg, &db_path.to_string_lossy()).unwrap());
+        let new_db = Database::open(&db_cfg, &db_path.to_string_lossy()).unwrap();
-        let mut rebuilder = StateRebuilder::new(new_db.clone(), Algorithm::OverlayRecent);
+        let new_db_with_metrics: Arc<dyn ethcore_db::KeyValueDB> =
+            Arc::new(ethcore_db::DatabaseWithMetrics::new(new_db));
+        let mut rebuilder =
+            StateRebuilder::new(new_db_with_metrics.clone(), Algorithm::OverlayRecent);
         let reader = PackedReader::new(&snap_file).unwrap().unwrap();
 
         let flag = AtomicBool::new(true);
@@ -98,7 +101,7 @@ fn snap_and_restore() {
         assert_eq!(rebuilder.state_root(), state_root);
         rebuilder.finalize(1000, H256::default()).unwrap();
 
-        new_db
+        new_db_with_metrics
     };
 
     let new_db = journaldb::new(db, Algorithm::OverlayRecent, ::db::COL_STATE);
@@ -163,10 +166,11 @@ fn get_code_from_prev_chunk() {
 
     let tempdir = TempDir::new("").unwrap();
     let db_cfg = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
-    let new_db = Arc::new(Database::open(&db_cfg, tempdir.path().to_str().unwrap()).unwrap());
+    let new_db = Database::open(&db_cfg, tempdir.path().to_str().unwrap()).unwrap();
-
+    let new_db_with_metrics = Arc::new(db::DatabaseWithMetrics::new(new_db));
     {
-        let mut rebuilder = StateRebuilder::new(new_db.clone(), Algorithm::OverlayRecent);
+        let mut rebuilder =
+            StateRebuilder::new(new_db_with_metrics.clone(), Algorithm::OverlayRecent);
         let flag = AtomicBool::new(true);
 
         rebuilder.feed(&chunk1, &flag).unwrap();
@@ -175,7 +179,11 @@ fn get_code_from_prev_chunk() {
         rebuilder.finalize(1000, H256::random()).unwrap();
     }
 
-    let state_db = journaldb::new(new_db, Algorithm::OverlayRecent, ::db::COL_STATE);
+    let state_db = journaldb::new(
+        new_db_with_metrics,
+        Algorithm::OverlayRecent,
+        ::db::COL_STATE,
+    );
     assert_eq!(state_db.earliest_era(), Some(1000));
 }
 
@@ -214,8 +222,10 @@ fn checks_flag() {
     let tempdir = TempDir::new("").unwrap();
     let db_path = tempdir.path().join("db");
     {
-        let new_db = Arc::new(Database::open(&db_cfg, &db_path.to_string_lossy()).unwrap());
+        let new_db = Database::open(&db_cfg, &db_path.to_string_lossy()).unwrap();
-        let mut rebuilder = StateRebuilder::new(new_db.clone(), Algorithm::OverlayRecent);
+        let new_db_with_metrics = Arc::new(db::DatabaseWithMetrics::new(new_db));
+        let mut rebuilder =
+            StateRebuilder::new(new_db_with_metrics.clone(), Algorithm::OverlayRecent);
         let reader = PackedReader::new(&snap_file).unwrap().unwrap();
 
         let flag = AtomicBool::new(false);

crates/ethcore/src/spec/spec.rs

@@ -970,7 +970,7 @@ impl Spec {
 
         let factories = Default::default();
         let mut db = journaldb::new(
-            Arc::new(kvdb_memorydb::create(0)),
+            Arc::new(db::InMemoryWithMetrics::create(0)),
             journaldb::Algorithm::Archive,
             None,
         );

crates/ethcore/src/test_helpers.rs

@@ -23,12 +23,12 @@ use blockchain::{
 };
 use blooms_db;
 use bytes::Bytes;
+use db::KeyValueDB;
 use ethereum_types::{Address, H256, U256};
 use ethkey::KeyPair;
 use evm::Factory as EvmFactory;
 use hash::keccak;
 use io::IoChannel;
-use kvdb::KeyValueDB;
 use kvdb_rocksdb::{self, Database, DatabaseConfig};
 use parking_lot::RwLock;
 use rlp::{self, RlpStream};
@@ -350,6 +350,10 @@ impl BlockChainDB for TestBlockChainDB {
     }
 }
 
+impl stats::PrometheusMetrics for TestBlockChainDB {
+    fn prometheus_metrics(&self, _: &mut stats::PrometheusRegistry) {}
+}
+
 /// Creates new test instance of `BlockChainDB`
 pub fn new_db() -> Arc<dyn BlockChainDB> {
     let blooms_dir = TempDir::new("").unwrap();
@@ -360,7 +364,9 @@ pub fn new_db() -> Arc<dyn BlockChainDB> {
         trace_blooms: blooms_db::Database::open(trace_blooms_dir.path()).unwrap(),
         _blooms_dir: blooms_dir,
         _trace_blooms_dir: trace_blooms_dir,
-        key_value: Arc::new(::kvdb_memorydb::create(::db::NUM_COLUMNS.unwrap())),
+        key_value: Arc::new(ethcore_db::InMemoryWithMetrics::create(
+            ::db::NUM_COLUMNS.unwrap(),
+        )),
     };
 
     Arc::new(db)
@@ -374,13 +380,13 @@ pub fn new_temp_db(tempdir: &Path) -> Arc<dyn BlockChainDB> {
 
     let db_config = DatabaseConfig::with_columns(::db::NUM_COLUMNS);
     let key_value_db = Database::open(&db_config, key_value_dir.to_str().unwrap()).unwrap();
-
+    let key_value_db_with_metrics = ethcore_db::DatabaseWithMetrics::new(key_value_db);
     let db = TestBlockChainDB {
         blooms: blooms_db::Database::open(blooms_dir.path()).unwrap(),
         trace_blooms: blooms_db::Database::open(trace_blooms_dir.path()).unwrap(),
         _blooms_dir: blooms_dir,
         _trace_blooms_dir: trace_blooms_dir,
-        key_value: Arc::new(key_value_db),
+        key_value: Arc::new(key_value_db_with_metrics),
     };
 
     Arc::new(db)
@@ -413,13 +419,14 @@ pub fn restoration_db_handler(
             &self.trace_blooms
         }
     }
+    impl stats::PrometheusMetrics for RestorationDB {
+        fn prometheus_metrics(&self, _: &mut stats::PrometheusRegistry) {}
+    }
 
     impl BlockChainDBHandler for RestorationDBHandler {
         fn open(&self, db_path: &Path) -> io::Result<Arc<dyn BlockChainDB>> {
-            let key_value = Arc::new(kvdb_rocksdb::Database::open(
+            let key_value = kvdb_rocksdb::Database::open(&self.config, &db_path.to_string_lossy())?;
-                &self.config,
+            let key_value = Arc::new(db::DatabaseWithMetrics::new(key_value));
-                &db_path.to_string_lossy(),
-            )?);
             let blooms_path = db_path.join("blooms");
             let trace_blooms_path = db_path.join("trace_blooms");
             fs::create_dir_all(&blooms_path)?;

crates/ethcore/sync/src/api.rs

@@ -42,7 +42,7 @@ use ethkey::Secret;
 use io::TimerToken;
 use network::IpFilter;
 use parking_lot::{Mutex, RwLock};
-use stats::{prometheus, prometheus_counter, prometheus_gauge, PrometheusMetrics};
+use stats::{PrometheusMetrics, PrometheusRegistry};
 
 use std::{
     net::{AddrParseError, SocketAddr},
@@ -323,11 +323,11 @@ impl SyncProvider for EthSync {
 }
 
 impl PrometheusMetrics for EthSync {
-    fn prometheus_metrics(&self, r: &mut prometheus::Registry) {
+    fn prometheus_metrics(&self, r: &mut PrometheusRegistry) {
         let scalar = |b| if b { 1i64 } else { 0i64 };
         let sync_status = self.status();
 
-        prometheus_gauge(r,
+        r.register_gauge(
 			"sync_status",
 			"WaitingPeers(0), SnapshotManifest(1), SnapshotData(2), SnapshotWaiting(3), Blocks(4), Idle(5), Waiting(6), NewBlocks(7)", 
 			match self.eth_handler.sync.status().state {
@@ -342,59 +342,50 @@ impl PrometheusMetrics for EthSync {
         });
 
         for (key, value) in sync_status.item_sizes.iter() {
-            prometheus_gauge(
+            r.register_gauge(
-                r,
                 &key,
                 format!("Total item number of {}", key).as_str(),
                 *value as i64,
             );
         }
 
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "net_peers",
             "Total number of connected peers",
             sync_status.num_peers as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "net_active_peers",
             "Total number of active peers",
             sync_status.num_active_peers as i64,
         );
-        prometheus_counter(
+        r.register_counter(
-            r,
             "sync_blocks_recieved",
             "Number of blocks downloaded so far",
             sync_status.blocks_received as i64,
         );
-        prometheus_counter(
+        r.register_counter(
-            r,
             "sync_blocks_total",
             "Total number of blocks for the sync process",
             sync_status.blocks_total as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "sync_blocks_highest",
             "Highest block number in the download queue",
             sync_status.highest_block_number.unwrap_or(0) as i64,
         );
 
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_download_active",
             "1 if downloading snapshots",
             scalar(sync_status.is_snapshot_syncing()),
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_download_chunks",
             "Snapshot chunks",
             sync_status.num_snapshot_chunks as i64,
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_download_chunks_done",
             "Snapshot chunks downloaded",
             sync_status.snapshot_chunks_done as i64,
@@ -408,8 +399,7 @@ impl PrometheusMetrics for EthSync {
             .manifest_block()
             .unwrap_or((0, H256::zero()));
 
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_create_block",
             "First block of the current snapshot creation",
             if let CreationStatus::Ongoing { block_number } = creation {
@@ -418,8 +408,7 @@ impl PrometheusMetrics for EthSync {
                 0
             },
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_restore_block",
             "First block of the current snapshot restoration",
             if let RestorationStatus::Ongoing { block_number, .. } = restoration {
@@ -428,8 +417,7 @@ impl PrometheusMetrics for EthSync {
                 0
             },
         );
-        prometheus_gauge(
+        r.register_gauge(
-            r,
             "snapshot_manifest_block",
             "First block number of the present snapshot",
             manifest_block_num as i64,

crates/rpc/src/v1/tests/helpers/sync_provider.rs

@@ -19,7 +19,7 @@
 use ethereum_types::H256;
 use network::client_version::ClientVersion;
 use parking_lot::RwLock;
-use stats::{prometheus, PrometheusMetrics};
+use stats::{PrometheusMetrics, PrometheusRegistry};
 use std::collections::BTreeMap;
 use sync::{EthProtocolInfo, PeerInfo, SyncProvider, SyncState, SyncStatus, TransactionStats};
 
@@ -69,7 +69,7 @@ impl TestSyncProvider {
 }
 
 impl PrometheusMetrics for TestSyncProvider {
-    fn prometheus_metrics(&self, _: &mut prometheus::Registry) {}
+    fn prometheus_metrics(&self, _: &mut PrometheusRegistry) {}
 }
 
 impl SyncProvider for TestSyncProvider {

crates/util/stats/src/lib.rs

@@ -26,39 +26,64 @@ use std::{
 extern crate log;
 pub extern crate prometheus;
 
-/// Implements a prometheus metrics collector
+pub struct PrometheusRegistry {
-pub trait PrometheusMetrics {
+    prefix: String,
-    fn prometheus_metrics(&self, registry: &mut prometheus::Registry);
+    registry: prometheus::Registry,
 }
 
-/// Adds a new prometheus counter with the specified value
+impl PrometheusRegistry {
-pub fn prometheus_counter(reg: &mut prometheus::Registry, name: &str, help: &str, value: i64) {
+    /// Create a new instance with the specified prefix
-    let c = prometheus::IntCounter::new(name, help).expect("name and help must be non-empty");
+    pub fn new(prefix: String) -> Self {
+        Self {
+            prefix,
+            registry: prometheus::Registry::new(),
+        }
+    }
+
+    /// Get internal registry
+    pub fn registry(&self) -> &prometheus::Registry {
+        &self.registry
+    }
+
+    /// Adds a new prometheus counter with the specified value
+    pub fn register_counter(&mut self, name: &str, help: &str, value: i64) {
+        let name = format!("{}{}", self.prefix, name);
+        let c = prometheus::IntCounter::new(name.as_str(), help)
+            .expect("name and help must be non-empty");
         c.inc_by(value);
-    reg.register(Box::new(c))
+        self.registry
+            .register(Box::new(c))
             .expect("prometheus identifiers must be unique");
-}
+    }
 
-/// Adds a new prometheus gauge with the specified gauge
+    /// Adds a new prometheus gauge with the specified gauge
-pub fn prometheus_gauge(reg: &mut prometheus::Registry, name: &str, help: &str, value: i64) {
+    pub fn register_gauge(&mut self, name: &str, help: &str, value: i64) {
-    let g = prometheus::IntGauge::new(name, help).expect("name and help must be non-empty");
+        let name = format!("{}{}", self.prefix, name);
+        let g = prometheus::IntGauge::new(name.as_str(), help)
+            .expect("name and help must be non-empty");
         g.set(value);
-    reg.register(Box::new(g))
+        self.registry
+            .register(Box::new(g))
             .expect("prometheus identifiers must be are unique");
-}
+    }
 
-/// Adds a new prometheus counter with the time spent in running the specified function
+    /// Adds a new prometheus counter with the time spent in running the specified function
-pub fn prometheus_optime<F: Fn() -> T, T>(r: &mut prometheus::Registry, name: &str, f: &F) -> T {
+    pub fn register_optime<F: Fn() -> T, T>(&mut self, name: &str, f: &F) -> T {
         let start = Instant::now();
         let t = f();
         let elapsed = start.elapsed();
-    prometheus_gauge(
+        self.register_gauge(
-        r,
             &format!("optime_{}", name),
             &format!("Time to perform {}", name),
             elapsed.as_millis() as i64,
         );
         t
+    }
+}
+
+/// Implements a prometheus metrics collector
+pub trait PrometheusMetrics {
+    fn prometheus_metrics(&self, registry: &mut PrometheusRegistry);
 }
 
 /// Sorted corpus of data.