Root cause of ServletException java.lang.OutOfMemoryError解决方法

王朝java/jsp·作者佚名 2006-01-09

问题描述:下载电子报表,当电子报表过大发生"Root cause of

ServletException java.lang.OutOfMemoryError"

问题状态:已解决

解决方法:调整bea/weblogic/common中CommEnv中参数

:sun

if "%PRODUCTION_MODE%" == "true" goto sun_prod_mode

set JAVA_VM=-client

set MEM_ARGS=-Xms256m -Xmx512m -XX:MaxPermSize=256m

set JAVA_OPTIONS=%JAVA_OPTIONS% -Xverify:none

goto continue

:sun_prod_mode

set JAVA_VM=-server

set MEM_ARGS=-Xms256m -Xmx512m -XX:MaxPermSize=256m

goto continue

即解决此问题

reference:

MaxPermSize:

The permanent space is memory allocated outside the regular

heap (i.e. in addition to the -Xmx setting), so it is important

to ensure there is enough physical RAM on the machine.

The permanent space is used to primarily store classes and

objects created for reflection support (methods etc.). If

you have a large number of classes in a Java application,

an OOM can occur if the PermSize is too small.

From one of your previous posts, you seem to have 8 applications,

so yes, setting the PermSize and/or MaxPermSize could help.

Also, 256MB sounds small for a server with 8 applications.

The OOM could simply indicate that your heap is too small.

Hope this helps,

Arunabh