diff --git a/chain/vm/vm.go b/chain/vm/vm.go
index c566ec1eb..44979454f 100644
--- a/chain/vm/vm.go
+++ b/chain/vm/vm.go
@@ -241,7 +241,7 @@ func (vm *VM) send(ctx context.Context, msg *types.Message, parent *Runtime,
 
 	if parent != nil {
 		defer func() {
-			parent.gasUsed += rt.gasUsed
+			parent.gasUsed = rt.gasUsed
 		}()
 	}
 	if gasCharge != nil {
diff --git a/cmd/lotus-bench/import.go b/cmd/lotus-bench/import.go
index 6af1bfc02..94dae0d98 100644
--- a/cmd/lotus-bench/import.go
+++ b/cmd/lotus-bench/import.go
@@ -130,7 +130,7 @@ var importBenchCmd = &cli.Command{
 		bdgOpt.Options.DetectConflicts = false
 
 		var bds datastore.Batching
-		if false {
+		if true {
 			cache := 512
 			bds, err = pebbleds.NewDatastore(tdir, &pebble.Options{
 				// Pebble has a single combined cache area and the write
@@ -147,7 +147,7 @@ var importBenchCmd = &cli.Command{
 				// Per-level options. Options for at least one level must be specified. The
 				// options for the last level are used for all subsequent levels.
 				Levels: []pebble.LevelOptions{
-					{TargetFileSize: 2 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10)},
+					{TargetFileSize: 16 * 1024 * 1024, FilterPolicy: bloom.FilterPolicy(10), Compression: pebble.NoCompression},
 				},
 				Logger: log,
 			})
diff --git a/go.mod b/go.mod
index 3b3b4fed7..17cb2fd36 100644
--- a/go.mod
+++ b/go.mod
@@ -58,7 +58,7 @@ require (
 	github.com/ipfs/go-ds-badger2 v0.1.1-0.20200708190120-187fc06f714e
 	github.com/ipfs/go-ds-leveldb v0.4.2
 	github.com/ipfs/go-ds-measure v0.1.0
-	github.com/ipfs/go-ds-pebble v0.0.2-0.20200921211847-f1ffb3128b61
+	github.com/ipfs/go-ds-pebble v0.0.2-0.20200921225637-ce220f8ac459
 	github.com/ipfs/go-filestore v1.0.0
 	github.com/ipfs/go-fs-lock v0.0.6
 	github.com/ipfs/go-graphsync v0.2.1
diff --git a/go.sum b/go.sum
index 19e33d294..6929c9a23 100644
--- a/go.sum
+++ b/go.sum
@@ -524,8 +524,8 @@ github.com/ipfs/go-ds-leveldb v0.4.2 h1:QmQoAJ9WkPMUfBLnu1sBVy0xWWlJPg0m4kRAiJL9
 github.com/ipfs/go-ds-leveldb v0.4.2/go.mod h1:jpbku/YqBSsBc1qgME8BkWS4AxzF2cEu1Ii2r79Hh9s=
 github.com/ipfs/go-ds-measure v0.1.0 h1:vE4TyY4aeLeVgnnPBC5QzKIjKrqzha0NCujTfgvVbVQ=
 github.com/ipfs/go-ds-measure v0.1.0/go.mod h1:1nDiFrhLlwArTME1Ees2XaBOl49OoCgd2A3f8EchMSY=
-github.com/ipfs/go-ds-pebble v0.0.2-0.20200921211847-f1ffb3128b61 h1:2wNNdpETSZgnsgy7wx7O6ueu+LCSZRedWrAsIPiOeFE=
-github.com/ipfs/go-ds-pebble v0.0.2-0.20200921211847-f1ffb3128b61/go.mod h1:oh4liWHulKcDKVhCska5NLelE3MatWl+1FwSz3tY91g=
+github.com/ipfs/go-ds-pebble v0.0.2-0.20200921225637-ce220f8ac459 h1:W3YMLEvOXqdW+sYMiguhWP6txJwQvIQqhvpU8yAMGQs=
+github.com/ipfs/go-ds-pebble v0.0.2-0.20200921225637-ce220f8ac459/go.mod h1:oh4liWHulKcDKVhCska5NLelE3MatWl+1FwSz3tY91g=
 github.com/ipfs/go-filestore v1.0.0 h1:QR7ekKH+q2AGiWDc7W2Q0qHuYSRZGUJqUn0GsegEPb0=
 github.com/ipfs/go-filestore v1.0.0/go.mod h1:/XOCuNtIe2f1YPbiXdYvD0BKLA0JR1MgPiFOdcuu9SM=
 github.com/ipfs/go-fs-lock v0.0.6 h1:sn3TWwNVQqSeNjlWy6zQ1uUGAZrV3hPOyEA6y1/N2a0=