Re: PostgreSQL vs MySQL, and FreeBSD - Mailing list pgsql-performance

From Ow Mun Heng
Subject Re: PostgreSQL vs MySQL, and FreeBSD
Date
Msg-id 1195206185.29253.56.camel@neuromancer.home.net
Whole thread Raw
In response to Re: PostgreSQL vs MySQL, and FreeBSD  (Sebastian Hennebrueder <usenet@laliluna.de>)
Responses Re: PostgreSQL vs MySQL, and FreeBSD  ("Dave Dutcher" <dave@tridecap.com>)
List pgsql-performance
On Fri, 2007-11-09 at 16:41 +0100, Sebastian Hennebrueder wrote:

> If the queries are complex, this is understable. I had a performance
> review of a Hibernate project (Java Object Relation Mapping) using
> MySQL. ORM produces easily "complex" queries with joins and subqueries.
> MySQL uses nested loops for subqueries which lead to performance issues
> with growing database size.

Even for Postgresql, nested loops are still evil and hampers
performance.




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