From: | "Mark Steben" <msteben(at)autorevenue(dot)com> |
---|---|
To: | <pgsql-admin(at)postgresql(dot)org> |
Cc: | <rich(at)autorevenue(dot)com>, "'David Parks'" <dparks(at)autorevenue(dot)com>, "'Craig Brothers'" <cbrothers(at)autorevenue(dot)com> |
Subject: | reconfiguring diskspace while upgrading to 8.2.5 |
Date: | 2007-12-28 15:08:41 |
Message-ID: | 002401c84963$87fc54b0$14010a0a@dei26g028575 |
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Thread: | |
Lists: | pgsql-admin |
Admin team,
We are upgrading from Postgres 7.4.5 to 8.2.5 in mid January. We are also
adding new disks
As we go. I am investigating using the new tablespace facility to move our
biggest and most accessed
Table to the new disk. Here are the statistics. We are running RAID 10
Current database size ------------- 63 GIG
Heavy accessed table to move:
Table ----------------------- 7.4 GIG
2 indexes ------------------- 3 GIG apiece
2 other indexes ------------- 2.5 GIG apiece
Current database disk configuration
TOTAL space -------------- 404 GIG
TOTAL spindles ----------- 3
TOTAL mirrors ------------ 3
New additional disk configuration
TOTAL space ------------ 290 GIG
TOTAL spindles ----------- 2
TOTAL mirrors ----------- 2
The choices we see are:
1. Adding the two new spindles to the other three making one huge
logical partition
And all 350+ tables and 400+ indexes continue to reside there
2. Keeping the two new spindles separate and dedicating the heavy access
table
And its 4 indexes to it.
3. Keeping the two new spindles separate and dedicating the heavy access
table
To it, but keeping the 4 indexes on the old partition.
I know that maintaining almost 700 GIG of total disk space being utilized by
a 63 GIG
Database looks like disk-space overkill but we do expect massive growth
over the
Next 2 - 3 years.
Any thoughts / comments would be appreciated.
Also are there tools out there that monitor disk I/O and disk speed?
Thanks for your time,
Mark Steben
Senior Database Administrator
@utoRevenueT
A Dominion Enterprises Company
480 Pleasant Street
Suite B200
Lee, MA 01238
413-243-4800 Home Office
413-243-4809 Corporate Fax
msteben <blocked::mailto:name(at)autorevenue(dot)com> @autorevenue.com
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