Date: Mon, 28 Apr 2014 17:12:02 +0100 From: Matthew Seaman <matthew@freebsd.org> To: freebsd-fs@freebsd.org Subject: File system deadlock -- postgresql related? Message-ID: <535E7DD2.3050600@freebsd.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --Ae9QFTg5kUCRlpVacu9NDq5mWWmk5B4Vx Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi, We've a FreeBSD-9.2-RELEASE-p3 server running postgresql-9.3.4 which is giving us some problems. I know of the performance problems with postgresql-9.3 referenced here: http://postgresql.1045698.n5.nabble.com/Perfomance-degradation-9-3-vs-9-2= -for-FreeBSD-td5800835.html and also on this list. However, we're seeing occasional system freezes for periods of maybe 5 -- 10 minutes, with many log messages like so appearing: Apr 28 16:19:57 db-17a kernel: g_vfs_done():mfid1p1[WRITE(offset=3D1058001420288, length=3D32768)]error = =3D 11 Apr 28 16:19:57 db-17a kernel: g_vfs_done():mfid1p1[WRITE(offset=3D1058001649664, length=3D32768)]error = =3D 11 Apr 28 16:19:57 db-17a kernel: g_vfs_done():mfid1p1[WRITE(offset=3D1058002010112, length=3D32768)]error = =3D 11 All I can google about that problem suggests the 'error 11' is a deadlock that occurs primarily when using disk encryption or other setups where disk IO would be more complex than normal. But that is certainly not the case here --- it's a UFS2 filesystem on a hardware RAID10 using 15k RPM SAS drives. Any clues? Am I correct to conclude that the mmap related performance problem is somehow related to the g_vfs_done() log messages? Cheers, Matthew --Ae9QFTg5kUCRlpVacu9NDq5mWWmk5B4Vx 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 (FreeBSD) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQJ8BAEBCgBmBQJTXn3aXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQxOUYxNTRFQ0JGMTEyRTUwNTQ0RTNGMzAw MDUxM0YxMEUwQTlFNEU3AAoJEABRPxDgqeTnL1kP/0DKNGlpbKg86023sH0zqjQZ +pCnBxj2Vh5RBSdvekzKKSP1WUTkOCteGIRqabJMjuQ1barDXu5mvi9E4j+MEoHY 8HhYesVlAoyFJYzI0vbRr2clSKcsZcZcxn535QvNB1NfVhRepI/5lxeZj+yUqbN3 tBfjudtNj4aMAYVeRbQnB32CoSfYJgIjHPJCHf4TbvQOTUhTFegeFqWkF32cYDKh f8JRKlyfRoT+LrbjWhBtxCkHn8Uoe6o4K16w8/PgTb150aPUaNJNy8NjdiHddGSA OGXnqbz8Vv1jHM4i2avrbak6Ssc+Wcg+gwtPmB8Tfg6oKvwu2tKUbeYrPahiEt9x zp2VssqCpyoKSPt39FYSk5bd9XIOxsWtiKsRkK6eptxzegN2taJIUaoLyiLKlcPG VWytK5iFJQnQSUyR7vXKUs5GvUtr+VzU0ul1zTeZsXfTM+OlwVPJYGx3yxkSsbLA 1o5HpXdfi29JkGyO4f6pD8aUjGbpPENuLn5UcgkCgBm4uBFVVCnfas1JPBgf6JWG 9yOsgYHIT5mBxLN4df3rWsAxbxp3G56zdIeUUuwJVu0CGcG5s2AeioCMt8OqMnwl rkXU3YvMqawRvcdJWDsRA49xpP0/XLh7MVfHixlnLVDwB11q16KnJLCrG2PqGNPr tGKhXESWBMUmD/V4G6a7 =8x3a -----END PGP SIGNATURE----- --Ae9QFTg5kUCRlpVacu9NDq5mWWmk5B4Vx--
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