Re: Need help to decide Mysql vs Postgres

Hi all,

Thanks for your replies.

I ran a very prelimnary test, and found following results. I feel they are
wierd and I dont know what I am doing wrong !!!

I made a schema with 5 tables. I have a master data table with foreign keys
pointing to other 4 tables. Master data table has around 4 million records.
When I run a select joining it with the baby tables,

postgres -> returns results in 2.8 seconds
mysql -> takes around 16 seconds !!!! (This is with myisam ... with innodb
it takes 220 seconds)

I am all for postgres at this point, however just want to know why I am
getting opposite results !!! Both DBs are on the same machine

Thanks,
Amit

-----Original Message-----
From: Jeffrey Tenny [mailto:jeffrey.tenny@comcast.net]
Sent: Monday, June 06, 2005 11:51 AM
To: pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Need help to decide Mysql vs Postgres


Re: your JDBC wishes: Consider IBM Cloudscape (now Apache Derby) too,
which has an apache license.  It's all pure java and it's easy to get going.


As to MySql vs Postgres: license issues aside, if you have
transactionally complex needs (multi-table updates, etc), PostgreSQL
wins hands down in my experience.  There are a bunch of things about
MySQL that just suck for high end SQL needs. (I like my subqueries,
and I absolutely demand transactional integrity).

There are some pitfalls to pgsql though, especially for existing SQL
code using MAX and some other things which can really be blindsided
(performance-wise) by pgsql if you don't use the workarounds.


MySQL is nice for what I call "raw read speed" applications. But that
license is an issue for me, as it is for you apparently.


Some cloudscape info:
http://www-306.ibm.com/software/data/cloudscape/

Some info on pitfalls of MySQL and PostgreSQL, an interesting contrast:
http://sql-info.de/postgresql/postgres-gotchas.html
http://sql-info.de/mysql/gotchas.html


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