diff --git a/actpool/actpool.go b/actpool/actpool.go
index c524d86c74..0a3b33d6a9 100644
--- a/actpool/actpool.go
+++ b/actpool/actpool.go
@@ -141,7 +141,7 @@ func NewActPool(g genesis.Genesis, sf protocol.StateReader, cfg Config, opts ...
 	ap.timerFactory = timerFactory
 
 	for i := 0; i < _numWorker; i++ {
-		ap.jobQueue[i] = make(chan workerJob, ap.cfg.MaxNumActsPerAcct)
+		ap.jobQueue[i] = make(chan workerJob, ap.cfg.WorkerBufferSize)
 		ap.worker[i] = newQueueWorker(ap, ap.jobQueue[i])
 		if err := ap.worker[i].Start(); err != nil {
 			return nil, err
diff --git a/actpool/config.go b/actpool/config.go
index 4ee79675ef..453f8d3efc 100644
--- a/actpool/config.go
+++ b/actpool/config.go
@@ -14,6 +14,7 @@ var (
 		MaxNumActsPerPool:  32000,
 		MaxGasLimitPerPool: 320000000,
 		MaxNumActsPerAcct:  2000,
+		WorkerBufferSize:   2000,
 		ActionExpiry:       10 * time.Minute,
 		MinGasPriceStr:     big.NewInt(unit.Qev).String(),
 		BlackList:          []string{},
@@ -28,6 +29,8 @@ type Config struct {
 	MaxGasLimitPerPool uint64 `yaml:"maxGasLimitPerPool"`
 	// MaxNumActsPerAcct indicates maximum number of actions an account queue can hold
 	MaxNumActsPerAcct uint64 `yaml:"maxNumActsPerAcct"`
+	// WorkerBufferSize indicates the buffer size for each worker's job queue
+	WorkerBufferSize uint64 `yaml:"bufferPerAcct"`
 	// ActionExpiry defines how long an action will be kept in action pool.
 	ActionExpiry time.Duration `yaml:"actionExpiry"`
 	// MinGasPriceStr defines the minimal gas price the delegate will accept for an action