I check the memory and get as follow.
It seems there is little memory left. But one can see the free buffers is still very big. Should increase the memory?
Code:
[root@s003ap06 iplanet6]# free
total used free shared buffers cached
Mem: 8199576 8158592 40984 0 309740 7149292
-/+ buffers/cache: 699560 7500016
Swap: 2096472 0 2096472