Re: Inserting 8MB bytea: just 25% of disk perf used?

2010/1/15 Pierre Frédéric Caillaud <lists(at)peufeu(dot)com>:
> On Thu, 14 Jan 2010 22:28:07 +0100, fkater(at)googlemail(dot)com <fkater(at)googlemail(dot)com> wrote:
>
>> Pierre Frédéric Caillaud:
>>
>>> > 4 Core CPU 3 Ghz, WinXP, 1 TB SATA disk.
>>>
>>>        Big CPU and slow disk...
>>>
>>>        You should add another disk just for the WAL -- disks are pretty cheap
>>> these days.
>>>        Writing the WAL on a second disk is the first thing to do on a
>>> configuration like yours, if you are limited by writes.
>>>        It also reduces the fsync lag a lot since the disk is only doing WAL.
>>
>> Good idea -- where can I set the path to WAL?
>
>        At install, or use a symlink (they exist on windows too !...)
>
>        http://stackoverflow.com/questions/1901405/postgresql-wal-on-windows
>
>        I've no idea of the other needed NTFS tweaks, like if there is a noatime/nodiratime ?...

It does. See http://www.hagander.net/talks/Advanced%20PostgreSQL%20on%20Windows.pdf

--
Magnus Hagander
Me: http://www.hagander.net/
Work: http://www.redpill-linpro.com/