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Re: How to improve db performance with $7K?

From: PFC <lists(at)boutiquenumerique(dot)com>
To: "Steve Poe" <spoe(at)sfnet(dot)cc>, "Cott Lang" <cott(at)internetstaff(dot)com>
Cc: pgsql-performance(at)postgresql(dot)org
Subject: Re: How to improve db performance with $7K?
Date: 2005-03-29 09:48:34
Message-ID: op.sod768rgth1vuj@localhost (view raw or flat)
Thread:
Lists: pgsql-performance
> With hardware tuning, I am sure we can do better than 35Mb per sec. Also

	WTF ?

	My Laptop does 19 MB/s (reading <10 KB files, reiser4) !

	A recent desktop 7200rpm IDE drive
# hdparm -t /dev/hdc1
/dev/hdc1:
  Timing buffered disk reads:  148 MB in  3.02 seconds =  49.01 MB/sec

# ll "DragonBall 001.avi"
-r--r--r--    1 peufeu   users        218M mar  9 20:07 DragonBall 001.avi

# time cat "DragonBall 001.avi" >/dev/null
real    0m4.162s
user    0m0.020s
sys     0m0.510s

(the file was not in the cache)
	=> about 52 MB/s (reiser3.6)

	So, you have a problem with your hardware...

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Subject: coalesce alternative
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Subject: Re: Delete query takes exorbitant amount of time

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