Date: Thu, 29 Aug 2013 16:03:46 -0600 From: Eric Browning <ericbrowning@skaggscatholiccenter.org> To: Freddie Cash <fjwcash@gmail.com> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: NFS on ZFS pure SSD pool Message-ID: <CAM=5oeCKRkhoRPaOaTYFDO%2BF5OAD9HT%2BZw82Lvop=J5T62=3%2BA@mail.gmail.com> In-Reply-To: <CAOjFWZ5dRTybK=Wg7MWQZS%2B1JVCue0DjkWLu5asRp%2BkxZPdgZQ@mail.gmail.com> References: <CAOFF%2BZ3jNvnWbE5C8LarRE7-SQbB4Q9NJTn01J=FGP9uppKdaw@mail.gmail.com> <1079189088.15197172.1377784177805.JavaMail.root@uoguelph.ca> <CAOFF%2BZ0SRDUNuaT73e4jU%2BFZESR35OS8Vo9cU-bV2-zn-HhWDw@mail.gmail.com> <CAOjFWZ6sigqx8LxMHmDvvH7XoNi-GCW=q1YzoXUoDq%2BOOBsC9Q@mail.gmail.com> <877gf4cj7o.wl%berend@pobox.com> <CAM=5oeCDScex=dv6NXM415MkUu3_qrnAm0DX3r7M8CoYzvUYsw@mail.gmail.com> <CAOjFWZ5dRTybK=Wg7MWQZS%2B1JVCue0DjkWLu5asRp%2BkxZPdgZQ@mail.gmail.com>
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Oops forgot to include the limit value sysctl vfs.zfs.arc_meta_limit vfs.zfs.arc_meta_limit: 14217216000 so using about 7 gig, limit is 14 gig. On Thu, Aug 29, 2013 at 3:58 PM, Freddie Cash <fjwcash@gmail.com> wrote: > On Thu, Aug 29, 2013 at 2:55 PM, Eric Browning < > ericbrowning@skaggscatholiccenter.org> wrote: > >> sysctl vfs.zfs.arc_meta_used yeilds: >> >> vfs.zfs.arc_meta_used: 6916698888 >> >> There is 56GB of RAM dedicated to ARC >> > > So that's using the full 12.5% (one eighth) of the ARC. Depending on how > efficient your ARC is (high data hit rates, low data hit rates, low actual > memory usage, etc), you may want to test increasing this to see if it helps > with the NFS cache hit rates stuff. > > -- Eric Browning Systems Administrator 801-984-7623 Skaggs Catholic Center Juan Diego Catholic High School Saint John the Baptist Middle Saint John the Baptist Elementary
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