Our Mail server is a Multi server installation , with a master, replica ldaps and one Mailstore. We have around 2000 users. But the highest number of active sessions will not go beyond 400 as the users works in shifts.
The CPU usage in our Mailstore is observed to be higher than 100% all the time, some times it tends to go more than 200%. The server has four cores.
For your reference , I am pasting out put from top command.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7299 zimbra 18 0 2187m 1.8g 17m S 169.1 30.4 1768:08 java
Can anyone suggest , Is this normal or do we have to do any tuning to get rid of this?