Date: Wed, 16 Jan 2019 18:11:46 +0000 From: Steve O'Hara-Smith <steve@sohara.org> To: byrnejb@harte-lyne.ca Cc: freebsd-questions@freebsd.org Subject: Re: Memory usage appears a bit high Message-ID: <20190116181146.375e2358d2091380c74a8291@sohara.org> In-Reply-To: <0c45ab67b1480d39dd87059495f6a27c.squirrel@webmail.harte-lyne.ca> References: <35c451bc1733004b7d868f60da68c639.squirrel@webmail.harte-lyne.ca> <20190116173621.9d90157c1adf526298763415@sohara.org> <0c45ab67b1480d39dd87059495f6a27c.squirrel@webmail.harte-lyne.ca>
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On Wed, 16 Jan 2019 12:46:39 -0500 "James B. Byrne" <byrnejb@harte-lyne.ca> wrote: > > > On Wed, January 16, 2019 12:36, Steve O'Hara-Smith wrote: > > On Wed, 16 Jan 2019 12:31:14 -0500 > > "James B. Byrne via freebsd-questions" <freebsd-questions@freebsd.org> > > wrote: > > > >> We have an Cyrus IMAP service running on a BHyve FreeBSD-11.2p7 vm. > >> It has 4 Gb allocated. I have noticed that top reports this: > >> > >> Mem: 164M Active, 204M Inact, 22M Laundry, 3426M Wired, 111M Free > > > > Are you running ZFS ? If so then most of the wired memory is > > probably ARC. > > > > Yes, we are running the vm using zfs. > > ARC: 2432M Total, 451M MFU, 1683M MRU, 8480K Anon, 38M Header, > 252M Other > 1828M Compressed, 3768M Uncompressed, 2.06:1 Ratio The ARC - ZFS cache is always in wired memory because it's kernel space buffers and it does have a tendency to eat all the memory it can get unless you constrain it by setting vfs.zfs.arc_max sysctl. -- Steve O'Hara-Smith | Directable Mirror Arrays C:\>WIN | A better way to focus the sun The computer obeys and wins. | licences available see You lose and Bill collects. | http://www.sohara.org/
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