| From: | Josh Berkus <josh(at)agliodbs(dot)com> |
|---|---|
| To: | "Anjan Dave" <adave(at)vantage(dot)com>, <fred(at)redhotpenguin(dot)com>, "William Yu" <wyu(at)talisys(dot)com> |
| Cc: | <pgsql-performance(at)postgresql(dot)org> |
| Subject: | Re: Scaling further up |
| Date: | 2004-03-02 21:26:19 |
| Message-ID: | 200403021326.19998.josh@agliodbs.com |
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| Thread: | |
| Lists: | pgsql-performance |
Anjan,
> Question - Are 73GB drives supposed to give better performance because
> of higher number of platters?
Not for your situation, no. Your issue is random seek times for multiple
simultaneous seek requests and batched checkpoint updates. Things that help
with this are:
More spindles
Better controllers, both RAID and individual disks
Faster drives
Particularly, I'd check out stuff like reports from Tom's Hardware for
evaluating the real speed of drives and seek times. Often a really good
10000 RPM SCSI will beat a 15000RPM SCSI if the latter has poor onboard
programming.
--
-Josh Berkus
Aglio Database Solutions
San Francisco
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