Hello, By default all the cache objects specified in the liferay-multi-vm-clustered.xml or in the liferay-single-vm.xml are set to default idle time out for 600 seconds (5 mins). Which means if a key in the cahe is not accessed for 5 minutes will be removed from the cache. If you want to extends the time out or want to add your your own cache you can follow the below steps. I am doing it for the liferay-multi-vm-clustered.xml 1. Goto liferay-portal-6.2-ee-sp10\tomcat-7.0.42\webapps\ROOT\WEB-INF\classes 2. Inside the classes create a folder, i have created a folder with the name ehcache. 3. Now copy liferay-multi-vm-clustered.xml file from the portal source. If you don't have the poral source code available with you, you can download it from here. https://github.com/agmip/liferay-portal-impl/blob/master/src/ehcache/liferay-multi-vm-clustered.xml 4. ...