Re: [zfs-discuss] ARC de-allocation with large ram

2012-10-22 Thread Richard Elling
On Oct 22, 2012, at 6:52 AM, Chris Nagele wrote: >> If after it decreases in size it stays there it might be similar to: >> >>7111576 arc shrinks in the absence of memory pressure > > After it dropped, it did build back up. Today is the first day that > these servers are working under r

Re: [zfs-discuss] ARC de-allocation with large ram

2012-10-22 Thread Chris Nagele
> If after it decreases in size it stays there it might be similar to: > > 7111576 arc shrinks in the absence of memory pressure After it dropped, it did build back up. Today is the first day that these servers are working under real production load and it is looking much better. arcstat i

Re: [zfs-discuss] ARC de-allocation with large ram

2012-10-22 Thread Tomas Forsman
On 22 October, 2012 - Robert Milkowski sent me these 3,6K bytes: > Hi, > > If after it decreases in size it stays there it might be similar to: > > 7111576 arc shrinks in the absence of memory pressure > > Also, see document: > > ZFS ARC can shrink down without memory pressure resu

Re: [zfs-discuss] ARC de-allocation with large ram

2012-10-22 Thread Robert Milkowski
Hi, If after it decreases in size it stays there it might be similar to: 7111576 arc shrinks in the absence of memory pressure Also, see document: ZFS ARC can shrink down without memory pressure result in slow performance [ID 1404581.1] Specifically, check if arc_no_grow is set