On 14/07/2015 03:18, Karl Denninger wrote:
The ARC is supposed to auto-size and use all available free memory. The problem is that the VM system and ARC system both make assumptions that under certain load patterns fight with one another, and when this happens and ARC wins the system gets in trouble FAST. The pattern is that the system will start to page RSS out rather than evict ARC, ARC will fill the freed space, it pages more RSS out..... you see where this winds up heading yes?
Something I noticed was that vfs.zfs.arc_free_target is smaller than vm.v_free_target on my desktop with 8GB I get vfs.zfs.arc_free_target: 14091 vm.v_free_target: 43195 Doesn't that cause arc allocation to trigger swapping leaving space for arc allocation.... -- FreeBSD - the place to B...Storing Data Shane Ambler _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
