Hi John, On Mon, Mar 28, 2011 at 10:50:56PM +0400, John Lepikhin wrote: > 2011/3/28 Jeffrey Hundstad <jeffrey.hundstad@xxxxxxxx>: > > > I'd take a look here: > > http://www.linuxinsight.com/proc_sys_vm_hierarchy.html > > Yes, I already played with dirty_*, min_free_kbytes (3000kb), > swappiness (0..100), vfs_cache_pressure (1..200) and zone_reclaim_mode > (currently 0). Other parameters are set to defaults. > > By the way, there is no swap enabled. Instead of just dropping 50% of > page caches, kernel was intensively swapping then there was a swap > device. Is your memory usage balanced across the nodes? You can check it via /sys/devices/system/node/node*/meminfo. Are there lots of high-order memory allocations? /proc/buddyinfo will disclose some of them. Thanks, Fengguang -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>