feat: add TrieCommitInterval configuration, commit trie every TrieCommitInterval blocks.

core/blockchain.go

@@ -143,6 +143,8 @@ type CacheConfig struct {
 
 	SnapshotNoBuild bool // Whether the background generation is allowed
 	SnapshotWait    bool // Wait for snapshot construction on startup. TODO(karalabe): This is a dirty hack for testing, nuke it
+
+	TrieCommitInterval uint64 // Define a block height interval, commit trie every TrieCommitInterval block height.
 }
 
 // defaultCacheConfig are the default caching values if none are specified by the
@@ -1424,7 +1426,7 @@ func (bc *BlockChain) writeBlockWithState(block *types.Block, receipts []*types.
 			chosen := current - bc.cacheConfig.TriesInMemory
 			flushInterval := time.Duration(atomic.LoadInt64(&bc.flushInterval))
 			// If we exceeded time allowance, flush an entire trie to disk
-			if bc.gcproc > flushInterval {
+			if bc.gcproc > flushInterval || (bc.cacheConfig.TrieCommitInterval != 0 && chosen%bc.cacheConfig.TrieCommitInterval == 0) {
 				// If the header is missing (canonical chain behind), we're reorging a low
 				// diff sidechain. Suspend committing until this operation is completed.
 				header := bc.GetHeaderByNumber(chosen)

eth/backend.go

@@ -199,6 +199,7 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 			TriesInMemory:       config.TriesInMemory,
 			SnapshotLimit:       config.SnapshotCache,
 			Preimages:           config.Preimages,
+			TrieCommitInterval:  config.TrieCommitInterval,
 		}
 	)
 	// Override the chain config with provided settings.

eth/ethconfig/config.go

@@ -84,6 +84,7 @@ var Defaults = Config{
 	TrieDirtyCache:          256,
 	TrieTimeout:             60 * time.Minute,
 	TriesInMemory:           128,
+	TrieCommitInterval:      0,
 	SnapshotCache:           102,
 	FilterLogCacheSize:      32,
 	Miner:                   miner.DefaultConfig,
@@ -168,6 +169,7 @@ type Config struct {
 	TrieDirtyCache          int
 	TrieTimeout             time.Duration
 	TriesInMemory           uint64 // How many tries keeps in memory
+	TrieCommitInterval      uint64 // Define a block height interval, commit trie every TrieCommitInterval block height.
 	SnapshotCache           int
 	Preimages               bool