| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | Arjen van der Meijden <acmmailing(at)tweakers(dot)net> |
| Cc: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>, Rajesh Kumar Mallah <mallah(dot)rajesh(at)gmail(dot)com>, pgsql-performance(at)postgresql(dot)org |
| Subject: | Re: suggestions for postgresql setup on Dell 2950 , PERC6i controller |
| Date: | 2009-02-16 13:31:37 |
| Message-ID: | 87tz6ucxty.fsf@oxford.xeocode.com |
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| Lists: | pgsql-performance |
Arjen van der Meijden <acmmailing(at)tweakers(dot)net> writes:
> When we purchased our Perc 5/e with MD1000 filled with 15 15k rpm sas disks, my
> colleague actually spend some time benchmarking the PERC and a ICP Vortex
> (basically a overclocked Adaptec) on those drives. Unfortunately he doesn't
> have too many comparable results, but it basically boiled down to quite good
> scores for the PERC and a bit less for the ICP Vortex.
> IOMeter sequential reads are above 300MB/s for the RAID5 and above 240MB/s for
> a RAID10 (and winbench99 versions range from 400+ to 600+MB/s).
FWIW those are pretty terrible numbers for fifteen 15k rpm drives. They're
about what you would expect if for a PCI-X card which was bus bandwidth
limited. A PCI-e card should be able to get about 3x that from the drives.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
Ask me about EnterpriseDB's RemoteDBA services!
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