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How to improve db performance with $7K?

From: Steve Poe <spoe(at)sfnet(dot)cc>
To: performance pgsql <pgsql-performance(at)postgresql(dot)org>
Subject: How to improve db performance with $7K?
Date: 2005-03-25 16:12:19
Message-ID: 42443863.4040302@sfnet.cc (view raw or flat)
Thread:
Lists: pgsql-performance
Situation:  An 24/7 animal hospital (100 employees) runs their business 
on Centos 3.3 (RHEL 3) Postgres 7.4.2 (because they have to) off a 2-CPU 
Xeon 2.8MHz, 4GB of RAM, (3) SCSI disks RAID 0 (zcav value 35MB per 
sec). The databse is 11GB comprised over 100 tables and indexes from 1MB 
to 2GB in size.

I recently told the hospital management team worst-case scenerio they 
need to get the database on its own drive array since the RAID0 is a 
disaster wating to happen. I said ideally a new dual AMD server with 
6/7-disk configuration would be ideal for safety and performance, but 
they don't have $15K.  I said a seperate drive array offer the balance 
of safety and performance.

I have been given budget of $7K to accomplish a safer/faster database 
through hardware upgrades.  The objective is to get a drive array, but I 
can use the budget any way I see fit to accomplish the goal.

Since I am a dba novice, I did not physically build this server, nor did 
I write the application the hospital runs on, but I have the opportunity 
to make it better, I'd thought I should seek some advice from those who 
have been down this road before.  Suggestions/ideas anyone?

Thanks.

Steve Poe

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Subject: Re: Delete query takes exorbitant amount of time
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