configurable state cache size

parity/cli/config.full.toml

@@ -79,6 +79,7 @@ pruning = "auto"
 cache_size_db = 64
 cache_size_blocks = 8
 cache_size_queue = 50
+cache_size_state = 25
 cache_size = 128 # Overrides above caches with total size
 fast_and_loose = false
 db_compaction = "ssd"

parity/cli/config.toml

@@ -48,6 +48,7 @@ pruning = "fast"
 cache_size_db = 128
 cache_size_blocks = 16
 cache_size_queue = 100
+cache_size_state = 25
 db_compaction = "ssd"
 fat_db = "off"
 

parity/cli/mod.rs

@@ -211,6 +211,8 @@ usage! {
 			or |c: &Config| otry!(c.footprint).cache_size_blocks.clone(),
 		flag_cache_size_queue: u32 = 50u32,
 			or |c: &Config| otry!(c.footprint).cache_size_queue.clone(),
+		flag_cache_size_state: u32 = 25u32,
+			or |c: &Config| otry!(c.footprint).cache_size_state.clone(),
 		flag_cache_size: Option<u32> = None,
 			or |c: &Config| otry!(c.footprint).cache_size.clone().map(Some),
 		flag_fast_and_loose: bool = false,
@@ -361,6 +363,7 @@ struct Footprint {
 	cache_size_db: Option<u32>,
 	cache_size_blocks: Option<u32>,
 	cache_size_queue: Option<u32>,
+	cache_size_state: Option<u32>,
 	db_compaction: Option<String>,
 	fat_db: Option<String>,
 }
@@ -532,6 +535,7 @@ mod tests {
 			flag_cache_size_db: 64u32,
 			flag_cache_size_blocks: 8u32,
 			flag_cache_size_queue: 50u32,
+			flag_cache_size_state: 25u32,
 			flag_cache_size: Some(128),
 			flag_fast_and_loose: false,
 			flag_db_compaction: "ssd".into(),
@@ -686,6 +690,7 @@ mod tests {
 				cache_size_db: Some(128),
 				cache_size_blocks: Some(16),
 				cache_size_queue: Some(100),
+				cache_size_state: Some(25),
 				db_compaction: Some("ssd".into()),
 				fat_db: Some("off".into()),
 			}),

parity/cli/usage.txt

@@ -209,6 +209,8 @@ Footprint Options:
                            megabytes (default: {flag_cache_size_blocks}).
   --cache-size-queue MB    Specify the maximum size of memory to use for block
                            queue (default: {flag_cache_size_queue}).
+  --cache-size-state MB    Specify the maximum size of memory to use for
+                           the state cache (default: {flag_cache_size_state}).
   --cache-size MB          Set total amount of discretionary memory to use for
                            the entire system, overrides other cache and queue
                            options.a (default: {flag_cache_size:?})