queue: CLI for auto-scaling and num verifiers

parity/cli/mod.rs

@@ -242,6 +242,8 @@ usage! {
 			or |c: &Config| otry!(c.footprint).db_compaction.clone(),
 		flag_fat_db: String = "auto",
 			or |c: &Config| otry!(c.footprint).fat_db.clone(),
+		flag_scale_verifiers: bool = false, or |_| None,
+		flag_num_verifiers: Option<usize> = None, or |_| None,
 
 		// -- Import/Export Options
 		flag_from: String = "1", or |_| None,

parity/cli/usage.txt

@@ -250,7 +250,7 @@ Footprint Options:
                            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:?})
+                           options. (default: {flag_cache_size:?})
   --fast-and-loose         Disables DB WAL, which gives a significant speed up
                            but means an unclean exit is unrecoverable. (default: {flag_fast_and_loose})
   --db-compaction TYPE     Database compaction type. TYPE may be one of:
@@ -261,6 +261,11 @@ Footprint Options:
                            of all accounts and storage keys. Doubles the size
                            of the state database. BOOL may be one of on, off
                            or auto. (default: {flag_fat_db})
+  --scale-verifiers        Automatically scale amount of verifier threads based on 
+                           workload. Not guaranteed to be faster.
+                           (default: {flag_scale_verifiers})
+  --num-verifiers INT      Amount of verifier threads to use or to begin with, if verifier
+                           auto-scaling is enabled. (default: {flag_num_verifiers:?})
 
 Import/Export Options:
   --from BLOCK             Export from block BLOCK, which may be an index or