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Compared MS SQL 2000 to Postgresql 9.0 on Windows

From: Tom Polak <tom(at)rockfordarearealtors(dot)org>
To: pgsql-performance(at)postgresql(dot)org
Subject: Compared MS SQL 2000 to Postgresql 9.0 on Windows
Date: 2010-12-07 17:34:25
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
We are in the process of deciding on how to proceed on a database upgrade.
We currently have MS SQL 2000 running on Windows 2003 (on my test server).
I was shocked at the cost for MS SQL 2008 R2 for a new server (2 CPU
license).  I started comparing DB’s and came across postgresql.  It seemed
to be exactly what I was after.  All of our programming is in
Since I am running MSSQL 2000 I have no benefit for .Net integration, so it
is not a concern.

I ran a head to head test of MS SQL 2000 and Postgresql 9.0.  Both are
running on Windows 2003.  What I found was quite surprising and I am
wondering if anyone can point out what is going on here.
Here is the test I ran.
I created 2 tables, the main table had 5 fields with a serial ID field.  The
second table linked to table 1 for a state field.

I had via MSSQL create 1,000 records in the main table. Took 9.85
seconds to complete.
Next I had via Postgresql create 1,000 records.  Took .65625
Postgresql smoked MS SQL server on that test.

Next test is to use and join all 1,000 rows with table 2 and then
display the text out.

MS SQL took 0.76 seconds to display
select name,address,city,state,statename,stateid,other from pgtemp1 left
join pgtemp2 on state=stateid

Then I did the same test via Postgresql and it took 8.85 seconds!  I tried
it again as I thought I did something wrong.  I did a few tweaks such as
increasing the shared buffers.  Still the best I could get it to was 7.5
seconds.  This is insanely slow compared to MSSQL 2000.  What am I missing.
Here is my SQL statement for postgresql:
select name,address,city,state,statename,stateid,other from pgtemp1 left
join pgtemp2 on state=stateid

Any ideas on why the Postgres server is soooo much slower on the joins?   I
am trying to understand what is going on here so please don’t flame me.  Any
advice is appreciated.

Tom Polak
Rockford Area Association of Realtors
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