Skip site navigation (1) Skip section navigation (2)

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 (view raw or flat)
Thread:
Lists: pgsql-performance
>>>>> "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.

-- 
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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/

In response to

pgsql-performance by date

Next:From: Pierre-Frédéric CaillaudDate: 2004-09-14 19:27:55
Subject: Re: Large # of rows in query extremely slow, not using
Previous:From: aaron wermanDate: 2004-09-14 18:20:50
Subject: Re: Data Warehouse Reevaluation - MySQL vs Postgres -- merge tables

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group