diff --git a/docs/config.md b/docs/config.md
index 498eb7a6d..494489aab 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -17,7 +17,7 @@ helm install vgpu-charts/vgpu vgpu --set devicePlugin.deviceMemoryScaling=5 ...
 * `devicePlugin.disablecorelimit:`
   String type, "true" for disable core limit, "false" for enable core limit, default: false
 * `scheduler.defaultMem:` 
-  Integer type, by default: 5000. The default device memory of the current task, in MB
+  Integer type, by default: 0. The default device memory of the current task, in MB.'0' means use 100% device memory
 * `scheduler.defaultCores:` 
   Integer type, by default: equals 0. Percentage of GPU cores reserved for the current task. If assigned to 0, it may fit in any GPU with enough device memory. If assigned to 100, it will use an entire GPU card exclusively.
 * `scheduler.defaultGPUNum:`
diff --git a/docs/config_cn.md b/docs/config_cn.md
index b94761fec..a60d4cc78 100644
--- a/docs/config_cn.md
+++ b/docs/config_cn.md
@@ -15,7 +15,7 @@ helm install vgpu vgpu-charts/vgpu --set devicePlugin.deviceMemoryScaling=5 ...
 * `devicePlugin.disablecorelimit:`
   字符串类型，"true"为关闭算力限制，"false"为启动算力限制，默认为"false"
 * `scheduler.defaultMem:`
-  整数类型，预设值为5000，表示不配置显存时使用的默认显存大小，单位为MB
+  整数类型，预设值为0，表示不配置显存时使用的默认显存大小，单位为MB。当值为0时，代表使用全部的显存。
 * `scheduler.defaultCores:`
   整数类型(0-100)，默认为0，表示默认为每个任务预留的百分比算力。若设置为0，则代表任务可能会被分配到任一满足显存需求的GPU中，若设置为100，代表该任务独享整张显卡
 * `scheduler.defaultGPUNum:`