Re: Sorting performance vs. MySQL

From: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
To: Yang Zhang <yanghatespam(at)gmail(dot)com>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Sorting performance vs. MySQL
Date: 2010-02-22 19:27:56
Message-ID: 20100222192756.GH4629@alvh.no-ip.org
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Yang Zhang escribió:
> I have the exact same table of data in both MySQL and Postgresql. In Postgresql:

I just noticed two things:

[snip lots of stuff]

1.

> ) ENGINE=MyISAM AUTO_INCREMENT=50410166 DEFAULT CHARSET=latin1

You're doing a comparison to MyISAM.

2.

> select * from metarelcloud_transactionlog order by transactionid;

You're reading the whole table.

This is unlikely to fly very far. I suggest you try some query that's
actually going to be used in the real world.

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.

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