Khushil Dep
2010-Nov-16 07:57 UTC
[zfs-discuss] ZFS - Sudden decrease in write performancep
Can you do an iostat -xCzn 3 from the start of test till it drops speed pls? Can you also show: echo "::interrupts" ? mdb -k On 16 Nov 2010 01:45, "Louis Carreiro" <carreirolt at gmail.com> wrote: That''s for pointing me towards that site! Saying that "txg_synctime_ms" controls zfs''s breathing was how I was thinking about it. Great way to describe it! Unfortunately setting txg_synctime_ms to 1000 or even 1 didn''t make an improvement. I tried adding the "disable-ohci=true" to the GRUB boot menu via SSH and it didn''t come back from it''s reboot so I''m not going to be able to due much more tonight (I''m working remotely). I do notice that when the ARC size reaches capacity, that''s when things slow down. Also, it never appears to drop after I kill the IO. If I stop all IO, arcstat shows all numbers but the arcsz drop. Should arcsz drop at all? On Mon, Nov 15, 2010 at 7:27 PM, Khushil Dep <khushil.dep at gmail.com> wrote:> > That controls zfs ...-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.opensolaris.org/pipermail/zfs-discuss/attachments/20101116/dd22faf5/attachment.html>