Re: Data Warehouse Reevaluation - MySQL vs Postgres -- merge tables

From: Vivek Khera <khera(at)kcilink(dot)com>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Data Warehouse Reevaluation - MySQL vs Postgres -- merge tables
Date: 2004-09-14 18:27:46
Message-ID: x7pt4ou2n1.fsf@yertle.int.kciLink.com
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>>>>> "MC" == Mark Cotner <mcotner(at)yahoo(dot)com> writes:

MC> I've finished porting the schema and am importing the
MC> data now. My estimates for just two-thirds(60 of the
MC> 90 days) of one of our 30 cable systems(MySQL dbs) is
MC> estimated to take about 16 hours. This may seem like
MC> a lot, but I'm satisfied with the performance. I've

be sure to load your data without indexes defined for your initial
import.

check your logs to see if increasing checkpoint_segments is
recommended. I found that bumping it up to 50 helped speed up my
data loads (restore from dump) significantly.

--
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Vivek Khera, Ph.D. Khera Communications, Inc.
Internet: khera(at)kciLink(dot)com Rockville, MD +1-301-869-4449 x806
AIM: vivekkhera Y!: vivek_khera http://www.khera.org/~vivek/

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