diff --git a/configs/deformable_detr/_base_/deformable_detr_reader.yml b/configs/deformable_detr/_base_/deformable_detr_reader.yml
index 5a7199296ae..3822df4235e 100644
--- a/configs/deformable_detr/_base_/deformable_detr_reader.yml
+++ b/configs/deformable_detr/_base_/deformable_detr_reader.yml
@@ -1,4 +1,4 @@
-worker_num: 0
+worker_num: 2
 TrainReader:
   sample_transforms:
   - Decode: {}
diff --git a/configs/mot/jde/_base_/jde_reader_1088x608.yml b/configs/mot/jde/_base_/jde_reader_1088x608.yml
index 922f08b986c..e34e2a36621 100644
--- a/configs/mot/jde/_base_/jde_reader_1088x608.yml
+++ b/configs/mot/jde/_base_/jde_reader_1088x608.yml
@@ -1,4 +1,4 @@
-worker_num: 2
+worker_num: 8
 TrainReader:
   sample_transforms:
     - Decode: {}
diff --git a/configs/solov2/_base_/solov2_reader.yml b/configs/solov2/_base_/solov2_reader.yml
index 3c96396ac21..f21516235f4 100644
--- a/configs/solov2/_base_/solov2_reader.yml
+++ b/configs/solov2/_base_/solov2_reader.yml
@@ -1,4 +1,4 @@
-worker_num: 2
+worker_num: 8
 TrainReader:
   sample_transforms:
   - Decode: {}