>> - Which OS filesystem are you using? Do you have noatime mount option >> turned on? > ext3 , no and i dont know how to turn it on noatime in /etc/fstab in the mount options field >> - Is it still slow with a different storage scheme (aufs, diskd)? > i didnt realy try aufs or diskd , do i have to? UFS is quite old, the other two are newer, and in most cases, better options, especially on Linux. >> - What's the memory usage? Is the machine swapping heavily? A 30G disk >> memory usage around 50% >yes its swapping heavily And here is the true reason for slowness: Memory shortage. Add more memory, or make the cache smaller. See the FAQ for memory requirement guesses: http://www.squid-cache.org/Doc/FAQ/FAQ-8.html#ss8.11. Joost
