diff --git a/Gopkg.lock b/Gopkg.lock
index 7ef6071ae..3b6d7d2a9 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -345,7 +345,7 @@
     "leveldb/table",
     "leveldb/util"
   ]
-  revision = "34011bf325bce385408353a30b101fe5e923eb6e"
+  revision = "169b1b37be738edb2813dab48c97a549bcf99bb5"
 
 [[projects]]
   branch = "master"
@@ -483,6 +483,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "749bac1b2eea5afcdd2fdca30c2d1b68763378c463f7c409742de028c4fe8402"
+  inputs-digest = "760ef0bfdecf48e51bf8a9e4409c04d46d1c74c8c42a8ca75447d5fd197f5095"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/Gopkg.toml b/Gopkg.toml
index 875028cc5..8c2015e56 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -138,7 +138,7 @@ ignored = [ "github.com/ethereum/go-ethereum/ethapi" ]
 
 [[override]]
   name = "github.com/syndtr/goleveldb"
-  revision = "34011bf325bce385408353a30b101fe5e923eb6e"
+  revision = "169b1b37be738edb2813dab48c97a549bcf99bb5"
 
 [[constraint]]
   branch = "master"
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/db.go b/vendor/github.com/syndtr/goleveldb/leveldb/db.go
index ea5595eb3..3655418ad 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/db.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/db.go
@@ -906,6 +906,8 @@ func (db *DB) GetSnapshot() (*Snapshot, error) {
 //		Returns the number of files at level 'n'.
 //	leveldb.stats
 //		Returns statistics of the underlying DB.
+//	leveldb.iostats
+//		Returns statistics of effective disk read and write.
 //	leveldb.writedelay
 //		Returns cumulative write delay caused by compaction.
 //	leveldb.sstables
@@ -959,6 +961,10 @@ func (db *DB) GetProperty(name string) (value string, err error) {
 				level, len(tables), float64(tables.size())/1048576.0, duration.Seconds(),
 				float64(read)/1048576.0, float64(write)/1048576.0)
 		}
+	case p == "iostats":
+		value = fmt.Sprintf("Read(MB):%.5f Write(MB):%.5f",
+			float64(db.s.stor.reads())/1048576.0,
+			float64(db.s.stor.writes())/1048576.0)
 	case p == "writedelay":
 		writeDelayN, writeDelay := atomic.LoadInt32(&db.cWriteDelayN), time.Duration(atomic.LoadInt64(&db.cWriteDelay))
 		value = fmt.Sprintf("DelayN:%d Delay:%s", writeDelayN, writeDelay)
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/db_write.go b/vendor/github.com/syndtr/goleveldb/leveldb/db_write.go
index 3662d95f0..31f4bc5ef 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/db_write.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/db_write.go
@@ -146,7 +146,7 @@ func (db *DB) unlockWrite(overflow bool, merged int, err error) {
 	}
 }
 
-// ourBatch if defined should equal with batch.
+// ourBatch is batch that we can modify.
 func (db *DB) writeLocked(batch, ourBatch *Batch, merge, sync bool) error {
 	// Try to flush memdb. This method would also trying to throttle writes
 	// if it is too fast and compaction cannot catch-up.
@@ -215,6 +215,11 @@ func (db *DB) writeLocked(batch, ourBatch *Batch, merge, sync bool) error {
 		}
 	}
 
+	// Release ourBatch if any.
+	if ourBatch != nil {
+		defer db.batchPool.Put(ourBatch)
+	}
+
 	// Seq number.
 	seq := db.seq + 1
 
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/session.go b/vendor/github.com/syndtr/goleveldb/leveldb/session.go
index ad68a8703..3f391f934 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/session.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/session.go
@@ -42,7 +42,7 @@ type session struct {
 	stTempFileNum    int64
 	stSeqNum         uint64 // last mem compacted seq; need external synchronization
 
-	stor     storage.Storage
+	stor     *iStorage
 	storLock storage.Locker
 	o        *cachedOptions
 	icmp     *iComparer
@@ -68,7 +68,7 @@ func newSession(stor storage.Storage, o *opt.Options) (s *session, err error) {
 		return
 	}
 	s = &session{
-		stor:     stor,
+		stor:     newIStorage(stor),
 		storLock: storLock,
 		fileRef:  make(map[int64]int),
 	}
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/storage.go b/vendor/github.com/syndtr/goleveldb/leveldb/storage.go
new file mode 100644
index 000000000..d45fb5dfe
--- /dev/null
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/storage.go
@@ -0,0 +1,63 @@
+package leveldb
+
+import (
+	"github.com/syndtr/goleveldb/leveldb/storage"
+	"sync/atomic"
+)
+
+type iStorage struct {
+	storage.Storage
+	read  uint64
+	write uint64
+}
+
+func (c *iStorage) Open(fd storage.FileDesc) (storage.Reader, error) {
+	r, err := c.Storage.Open(fd)
+	return &iStorageReader{r, c}, err
+}
+
+func (c *iStorage) Create(fd storage.FileDesc) (storage.Writer, error) {
+	w, err := c.Storage.Create(fd)
+	return &iStorageWriter{w, c}, err
+}
+
+func (c *iStorage) reads() uint64 {
+	return atomic.LoadUint64(&c.read)
+}
+
+func (c *iStorage) writes() uint64 {
+	return atomic.LoadUint64(&c.write)
+}
+
+// newIStorage returns the given storage wrapped by iStorage.
+func newIStorage(s storage.Storage) *iStorage {
+	return &iStorage{s, 0, 0}
+}
+
+type iStorageReader struct {
+	storage.Reader
+	c *iStorage
+}
+
+func (r *iStorageReader) Read(p []byte) (n int, err error) {
+	n, err = r.Reader.Read(p)
+	atomic.AddUint64(&r.c.read, uint64(n))
+	return n, err
+}
+
+func (r *iStorageReader) ReadAt(p []byte, off int64) (n int, err error) {
+	n, err = r.Reader.ReadAt(p, off)
+	atomic.AddUint64(&r.c.read, uint64(n))
+	return n, err
+}
+
+type iStorageWriter struct {
+	storage.Writer
+	c *iStorage
+}
+
+func (w *iStorageWriter) Write(p []byte) (n int, err error) {
+	n, err = w.Writer.Write(p)
+	atomic.AddUint64(&w.c.write, uint64(n))
+	return n, err
+}
diff --git a/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go
index bab62bfce..b82979801 100644
--- a/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go
+++ b/vendor/github.com/syndtr/goleveldb/leveldb/storage/file_storage_plan9.go
@@ -8,7 +8,6 @@ package storage
 
 import (
 	"os"
-	"path/filepath"
 )
 
 type plan9FileLock struct {
@@ -48,8 +47,7 @@ func rename(oldpath, newpath string) error {
 		}
 	}
 
-	_, fname := filepath.Split(newpath)
-	return os.Rename(oldpath, fname)
+	return os.Rename(oldpath, newpath)
 }
 
 func syncDir(name string) error {