Lee Schermerhorn <Lee.Schermerhorn@xxxxxx> writes: > On Wed, 2010-08-18 at 23:21 +0800, Wu Fengguang wrote: > > Andi, Christoph and Lee: > > > > This looks like an "unbalanced NUMA memory usage leading to premature > > swapping" problem. > > What is the value of the vm.zone_reclaim_mode sysctl? If it is !0, the > system will go into zone reclaim before allocating off-node pages. > However, it shouldn't "swap" in this case unless (zone_reclaim_mode & 4) > != 0. And even then, zone reclaim should only reclaim file pages, not > anon. In theory... Hi. This is zero on all our machines: # sysctl vm.zone_reclaim_mode vm.zone_reclaim_mode = 0 Cheers, Chris. -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>