[semprot]

Originally Posted by webizen

try increase apc.shm_size (=> 512M)

also apc.stat=0

thanks, apc.stat is 0 now, but once i changed apc.shm_size to 512m, i started getting 503 error on all domains on my server.

Eventhough i have enough free ram (i think)

root@mybox [/home/xxxxx]# free -m
total used free shared buffers cached
Mem: 12001 7501 4500 0 1229 3169
-/+ buffers/cache: 3102 8899
Swap: 2047 0 2047

Once i reverted it back to 256m, the 503 error gone. Do you think i need to upgrade my RAM although i have "enough" (IMO) ram?