Date: Fri, 13 Jan 2006 23:15:33 +0100 From: Claus Guttesen <kometen@gmail.com> To: Slawek Zak <slawek.zak@gmail.com> Cc: freebsd-database@freebsd.org, freebsd-performance@freebsd.org Subject: Re: Horrible PostgreSQL performance with NFS Message-ID: <b41c75520601131415u36e2006es@mail.gmail.com> In-Reply-To: <787bbe1c0601131220j7b3a052ege5fe4683156312a7@mail.gmail.com> References: <787bbe1c0601131220j7b3a052ege5fe4683156312a7@mail.gmail.com>
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> A couple of days ago I've moved our production database from local > disks to NetAPP filer serving NFS. Performance for this server dropped > by factor of 10 if not more. From a happy 10% load, the server hit the > ceiling and sees load of 100% all the time with runqueue above 30. The > > I can provide postgresql config. Sysctl knobs remain untouched not > counting basic NFS tweaking. For mount_nfs I tried to change NFS > buffer sizes -r -w. I also tried the -L option to keep the lock > traffic local. On the postgres side, setting fsync =3D off in > postgresql.conf. It didn't change a thing. Did you try tcp? regards Claus
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