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Setup of four 15k SAS disk with LSI raid controller - Mailing list pgsql-performance

From Niels Kristian Schjødt
Subject Setup of four 15k SAS disk with LSI raid controller
Date
Msg-id AF0D49A8-1E14-4170-B122-B318C52360C5@autouncle.com
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Responses Re: Setup of four 15k SAS disk with LSI raid controller
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I have a server with 32GB ram, one intel E3-1245 and four 15k SAS disks with a BB LSI MegaRaid controller. I wan't the
optimalperformance for my server, which will be pretty write heavy at times, and less optimized for redundancy, as my
datais not very crucial and I will be running a streaming replication along side. 

Now what would you prefer:

1) 3 disks in RAID 0 containing PGDATA + 1 containing SYSTEM and WAL
2) All four in RAID 10 containing both PGDATA, SYSTEM AND WAL
3) 2 disks in RAID 1 containing PGDATA + 2 disks in RAID 1 containing SYSTEM and WAL
4) Something different?

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