diff --git a/paddle/fluid/framework/distributed_strategy.proto b/paddle/fluid/framework/distributed_strategy.proto
index 7cf8d55aeeb1d99acd2f501461f0563f87a25e78..07ea824dc7a4c32972fe0aeb8e02bbb5baa70219 100644
--- a/paddle/fluid/framework/distributed_strategy.proto
+++ b/paddle/fluid/framework/distributed_strategy.proto
@@ -140,7 +140,7 @@ message DistributedStrategy {
   optional int32 fuse_grad_size_in_MB = 19 [ default = 32 ];
   optional float fuse_grad_size_in_TFLOPS = 20 [ default = 50 ];
   optional bool cudnn_exhaustive_search = 21 [ default = true ];
-  optional int32 conv_workspace_size_limit = 22 [ default = 4000 ];
+  optional int32 conv_workspace_size_limit = 22 [ default = 512 ];
   optional bool cudnn_batchnorm_spatial_persistent = 23 [ default = true ];
   optional bool adaptive_localsgd = 24 [ default = false ];
   optional bool fp16_allreduce = 25 [ default = false ];