Обсуждение: Howto get tranaction rate in postgres

Hello,

I've been asked to give the transaction rate of a deployed system. How can I mesure this in postgres. Could not find anything in the documentation. Are there any tools for this.

Thanx for your help

Marco

On Tue, May 23, 2006 at 09:18:19AM +0200, Meyer Marco wrote:
> I've been asked to give the transaction rate of a deployed system. How
> can I mesure this in postgres. Could not find anything in the
> documentation. Are there any tools for this.

What transaction rate?  The current rate over some time interval?
The maximum possible rate for a particular set of statements?  What
are you trying to measure?

--
Michael Fuhr

Hi,

I mean the transactions over time interval. Say the current db
transactions per minute.

Thanks
Marco

-----Original Message-----
From: Michael Fuhr [mailto:mike@fuhr.org]
Sent: Tuesday, May 23, 2006 3:41 PM
To: Meyer Marco
Cc: pgsql-admin@postgresql.org
Subject: Re: [ADMIN] Howto get tranaction rate in postgres

On Tue, May 23, 2006 at 09:18:19AM +0200, Meyer Marco wrote:
> I've been asked to give the transaction rate of a deployed system. How

> can I mesure this in postgres. Could not find anything in the
> documentation. Are there any tools for this.

What transaction rate?  The current rate over some time interval?
The maximum possible rate for a particular set of statements?  What are
you trying to measure?

--
Michael Fuhr

On Tue, May 23, 2006 at 03:49:20PM +0200, Meyer Marco wrote:
> I mean the transactions over time interval. Say the current db
> transactions per minute.

See the "Monitoring Database Activity" chapter in the documentation:

http://www.postgresql.org/docs/8.1/interactive/monitoring.html

One way would be to query pg_stat_database periodically and track
how fast xact_commit and xact_rollback are changing.  With monitoring
software like MRTG you could write a script to query pg_stat_database
and let the monitor track the rate of change and draw activity graphs.

Pgfouine generates usage reports but I haven't used it so I don't
know anything about it other than what its web site says.  See
"Sample reports" at the following link:

http://pgfouine.projects.postgresql.org/

--
Michael Fuhr