Error Starting Weblogic Admin Server: Could not reserve enough spacefor object heap

Error

"Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine. "

Reason for this error is when we make changes memory variable and assign more memory and we don't have enough memory available... server startup is failed with this error.

Solution

You can remove this error while decreasing heap size in setSOADomainEnvt.cmd

%ORACLE_HOME%\user_projects\domains\DOMAIN\BIN\setSOADomainEnvt.cmd

set DEFAULT_MEM_ARGS=-Xms512m -Xmx1024m
set PORT_MEM_ARGS=-Xms768m -Xmx1536m

set DEFAULT_MEM_ARGS=%DEFAULT_MEM_ARGS% -XX:PermSize=128m -XX:MaxPermSize=512m
set PORT_MEM_ARGS=%PORT_MEM_ARGS% -XX:PermSize=256m -XX:MaxPermSize=512m