Re: Trying to figure out pgbench

I had a similar experience.

regardless of scaling, etc, I got same results. almost like flags
are not active.

did

pgbench -I template1
and
pgbench -c 10 -t 50 -v -d 1

and played around from there....

This is on IBM pSeries, AIX5.3, PG8.0.2

-----Original Message-----
From: pgsql-performance-owner(at)postgresql(dot)org [mailto:pgsql-performance-owner(at)postgresql(dot)org] On Behalf Of William Yu
Sent: Tuesday, June 21, 2005 12:05 PM
To: pgsql-performance(at)postgresql(dot)org
Subject: [PERFORM] Trying to figure out pgbench

My Dual Core Opteron server came in last week. I tried to do some
benchmarks with pgbench to get some numbers on the difference between
1x1 -> 2x1 -> 2x2 but no matter what I did, I kept getting the same TPS
on all systems. Any hints on what the pgbench parameters I should be using?

In terms of production use, it definitely can handle more load.
Previously, Apache/Perl had to run on a separate server to avoid a ~50%
penalty. Now, the numbers are +15% performance even with Apache/Perl
running on the same box as PostgreSQL. How much more load of course is
what I'd like to quantify.

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
choose an index scan if your joining column's datatypes do not
match