optimize the size of iavl cache (#137)

* expand the size of iavl cache

* format code

server/start.go

@@ -4,6 +4,7 @@ package server
 
 import (
 	"fmt"
+	"github.com/cosmos/cosmos-sdk/store/iavl"
 	"os"
 	"runtime/pprof"
 
@@ -127,6 +128,8 @@ which accepts a path for the resulting pprof file.
 	cmd.Flags().String(FlagEvmImportMode, "default", "Select import mode for evm state (default|files|db)")
 	cmd.Flags().String(FlagEvmImportPath, "", "Evm contract & storage db or files used for InitGenesis")
 	cmd.Flags().Uint64(FlagGoroutineNum, 0, "Limit on the number of goroutines used to import evm data(ignored if evm-import-mode is 'default')")
+	cmd.Flags().IntVar(&iavl.IavlCacheSize, iavl.FlagIavlCacheSize, 1000000, "Max size of iavl cache")
+
 	viper.BindPFlag(FlagTrace, cmd.Flags().Lookup(FlagTrace))
 	viper.BindPFlag(FlagPruning, cmd.Flags().Lookup(FlagPruning))
 	viper.BindPFlag(FlagPruningKeepRecent, cmd.Flags().Lookup(FlagPruningKeepRecent))

store/iavl/store.go

@@ -1,10 +1,10 @@
 package iavl
 
 import (
+	"errors"
+	"fmt"
 	"io"
 	"sync"
-	"fmt"
-	"errors"
 
 	"github.com/tendermint/iavl"
 	abci "github.com/tendermint/tendermint/abci/types"
@@ -18,8 +18,9 @@ import (
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
 
-const (
-	defaultIAVLCacheSize = 10000
+var (
+	FlagIavlCacheSize = "iavl-cache-size"
+	IavlCacheSize     = 1000000
 )
 
 var (
@@ -45,7 +46,7 @@ func LoadStore(db dbm.DB, id types.CommitID, lazyLoading bool, startVersion int6
 // to the one given. Internally, it will load the store's version (id) from the
 // provided DB. An error is returned if the version fails to load.
 func LoadStoreWithInitialVersion(db dbm.DB, id types.CommitID, lazyLoading bool, initialVersion uint64) (types.CommitKVStore, error) {
-	tree, err := iavl.NewMutableTreeWithOpts(db, defaultIAVLCacheSize, &iavl.Options{InitialVersion: initialVersion})
+	tree, err := iavl.NewMutableTreeWithOpts(db, IavlCacheSize, &iavl.Options{InitialVersion: initialVersion})
 	if err != nil {
 		return nil, err
 	}