Sorry, Where should I do so ? This box has about 4 Gig of RAM [root@cache squid]# dmesg | grep mem Memory: 3958780k/3997664k available (1863k kernel code, 37912k reserved, 753k data, 176k init, 3080160k highmem) At this minute I stopped squid, so I have top - 19:13:44 up 1 day, 23:46, 5 users, load average: 0.00, 0.00, 0.00 Tasks: 86 total, 1 running, 85 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 99.8% id, 0.2% wa, 0.0% hi, 0.0% si Mem: 3960588k total, 459048k used, 3501540k free, 124024k buffers Swap: 8388600k total, 0k used, 8388600k free, 248816k cached Thanks to point out specifically where. Much regards, Dan