Date: Tue, 11 Nov 2014 13:47:59 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-current@freebsd.org Cc: Steven Hartland <killing@multiplay.co.uk>, Andriy Gapon <avg@freebsd.org> Subject: Re: r273165. ZFS ARC: possible memory leak to Inact Message-ID: <201411111347.59169.jhb@freebsd.org> In-Reply-To: <5459F372.1010405@FreeBSD.org> References: <5458c456.25b9340a.54d5.6310SMTPIN_ADDED_BROKEN@mx.google.com> <5458CCB6.7020602@multiplay.co.uk> <5459F372.1010405@FreeBSD.org>
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On Wednesday, November 05, 2014 4:52:50 am Andriy Gapon wrote: > On 04/11/2014 14:55, Steven Hartland wrote: > > This is likely spikes in uma zones used by ARC. > > > > The VM doesn't ever clean uma zones unless it hits a low memory condition, which > > explains why your little script helps. > > > > Check the output of vmstat -z to confirm. > > Steve, > > this is nonsense :-) You know perfectly well that UMA memory is Wired not Inactive. Grab the code at www.freebsd.org/~jhb/vm_objects/. Build and load the kld and then use the vm_objects binary to generate a list of the active VM objects in the system along with counts of how many active / inactive pages each object contains. For your case with lots of inactive memory, you probably want something like 'vm_objects | sort -n -k 2'. -- John Baldwin
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