Im using AS4.0 Kernel 2.6.16.20 and my uptime is 11 days... Ive notice that the memory usage only increase, increase and didnt get free. Googling i found this: ============================================================ Writing to this will cause the kernel to drop clean caches, dentries and inodes from memory, causing that memory to become free. To free pagecache: * echo 1 > /proc/sys/vm/drop_caches To free dentries and inodes: * echo 2 > /proc/sys/vm/drop_caches To free pagecache, dentries and inodes: * echo 3 > /proc/sys/vm/drop_caches As this is a non-destructive operation and dirty objects are not freeable, the user should run "sync" first. ================================================================= My system with 5 days uptime got 50MB free, doing a sync and then echo 3 > /proc/sys/vm/drop_caches frees all the memory making 1683452k free memory =D It free all the cached memory shown in "top". -- []'s Luiz Henrique Ozaki