I have a jboss 5 application server running on RHEL 6 64 bit.It is running on a 24 GB redhat box having heap size of (initial + final) of 16 GB.The application used to run fine few days and suddenly the client reports that they are unable to access the application.They have to wait after they access application the application in browser.

When the jboss server is restarted the application starts with a blazing speed.I am unable to detect the issue and didn't find any thing wrong.