| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | shridhar_daithankar(at)persistent(dot)co(dot)in |
| Cc: | pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: Performance advice |
| Date: | 2003-06-24 14:18:57 |
| Message-ID: | 19141.1056464337@sss.pgh.pa.us |
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| Lists: | pgsql-performance |
"Shridhar Daithankar" <shridhar_daithankar(at)persistent(dot)co(dot)in> writes:
>> - Would a RAID setup make the disk faster? Because top rarely shows the
>> CPUs above 50%, I suspect maybe the disk is the bottleneck.
> Yes it is. You need to move WAL to a different disk.
For an update-intensive setup, putting WAL on its own disk is definitely
your biggest win. You might then find it rewarding to fool with the
wal_sync_method and perhaps to bump up wal_buffers a little. A small
number of people have had luck with putting a nonzero commit_delay but
I have little faith in that.
regards, tom lane
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