Date: Thu, 27 Sep 2018 23:00:31 -0400 From: Allan Jude <allanjude@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: 12.0-ALPHA5 - ZFS default ARC max apparently forcing system to run out of memory Message-ID: <73c9d4f4-02db-1db2-419b-04167ed9216e@freebsd.org> In-Reply-To: <f3267619-8706-47d2-7b07-590937bf4df7@bluestop.org> References: <f3267619-8706-47d2-7b07-590937bf4df7@bluestop.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --iaQ1FsEl9pQo3aWqwguVBQt1iw54maDBe Content-Type: multipart/mixed; boundary="CSE4p3KCS2x1crVq3GR87aHhInRw2zyaB"; protected-headers="v1" From: Allan Jude <allanjude@freebsd.org> To: freebsd-current@freebsd.org Message-ID: <73c9d4f4-02db-1db2-419b-04167ed9216e@freebsd.org> Subject: Re: 12.0-ALPHA5 - ZFS default ARC max apparently forcing system to run out of memory References: <f3267619-8706-47d2-7b07-590937bf4df7@bluestop.org> In-Reply-To: <f3267619-8706-47d2-7b07-590937bf4df7@bluestop.org> --CSE4p3KCS2x1crVq3GR87aHhInRw2zyaB Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 2018-09-27 18:01, Rebecca Cran wrote: > I'm running 12.0-ALPHA5 on a laptop which has 32GB RAM and 2GB swap. > I've found it running out of memory when building ports via synth: I > think I've also seen it when running a buildworld. Johannes on > FreeBSDDesktop suggested it might be related to ZFS, and setting > vfs.zfs.arc_max to 8GB *does* appear to have resolved the problem. >=20 >=20 > Shortly after running out of memory (with |"swap_pager_getswapspace(32)= : > failed" messages)|, the first few lines of 'top' were: >=20 >=20 > Mem: 4335M Active, 4854M Inact, 7751M Laundry, 9410M Wired, 48K Buf, > 5332M Free >=20 > ARC: 5235M Total, 4169M MFU, 497M MRU, 172K Anon, 97M Header, 471M Othe= r >=20 > =C2=A0=C2=A0=C2=A0=C2=A0 3479M Compressed, 5930M Uncompressed, 1.70:1 R= atio >=20 > Swap: 2048M Total, 2009M Used, 39M Free, 98% Inuse >=20 >=20 >=20 > I've not seen this happen before on ZFS systems, so is it a regression > in 12? >=20 >=20 It doesn't appear like ZFS is dominating memory usage there. Using less than the 8GB you indicated that setting the max to solved the problem... --=20 Allan Jude --CSE4p3KCS2x1crVq3GR87aHhInRw2zyaB-- --iaQ1FsEl9pQo3aWqwguVBQt1iw54maDBe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (MingW32) iQIcBAEBAgAGBQJbrZlTAAoJEBmVNT4SmAt+6EMP/1CTPP4aS8NsMSmBSPLsCNfv wfPt2i4nkkNkdwaXIByzssZdaklS73pBAdJQv1jdSq5TnyNcp/JVhM4PWTZ37Ceq 24W70n94NCgjUHqCM0iF8GHFh3MwfNKuszo2fRDTZgkLZctXkhcy3QQmiRgxw1Ji k0hjIC6854hhm/e6BPPmK8XfojHZDbFES2Jgo4jdQCvOKHfmA3JCB1/eW7NLx+a7 O3+0+yozUHEND/8wCVUbOyEu0qt0xCh3nLkUl2TcVQxJ1PIPFE3i0K8J6xnXQ6Zi Lgrna+t1JQVWuh5z/r1oJrCs/KL8LyqxGyAYCceWuWARBwfRwOEJHKBfo//uz0PH BOZdBaEAAYx0gj514c/35cL4oVcCSPfavYRiy8Wq7kl0XAnOIolEujBnCNVpKEnN qvVgWJt0fBdoOGEHedsYjZmHkWHFc4s58sWMCpnY7i/R84DLFCkh5UqpOV7bSq3d cIDR/O1H64jERuA6GE5KzfTAg1ZYXPc6PsnABHpuX5q719/5HMNPFyBXjoCHB8ok KaoB9LwyeoDMCX2Y6qXmeM8Q4t8mi11AmzeLDdrxLNsBLZOm0PKyfxEup2L9VKQC KtNT7USpJsSeO/d68dL8WZQEug0ZDUybLFy4zirNwPuExgPjCLTxY8HcQz4gFPEK s4jWPRQIzJ7Mler8yaOm =Nj26 -----END PGP SIGNATURE----- --iaQ1FsEl9pQo3aWqwguVBQt1iw54maDBe--
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