From: Tobias Brox <tobias@nordicbet.com>
To: Tobias Brox <tobias@nordicbet.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: "nice"/low priority Query
Date: Tue, 2 Aug 2005 21:59:15 +0200
Message-ID: <20050802195915.GA9691@tobias.lan> (raw)
In-Reply-To: <20050802160434.GD9278@tobias.lan>
References: <20050802160434.GD9278@tobias.lan>
[Tobias Brox - Tue at 06:04:34PM +0200]
> (...) and at one
> point in the code I'm even asking the database for "explain plan", grepping
> out the estimated cost number, and referring the user to take contact with
> the IT-dept if he really needs the report. But I digress.
I just came to think about some more "dirty" tricks I can do. I have turned
on stats collection in the configuration; now, if I do:
select count(*) from pg_stat_activity where not current_query like '<IDLE>%';
or, eventually:
select count(*) from pg_stat_activity
where not current_query like '<IDLE>%' and query_start+'1 second'<now();
it will give a hint about how busy the database server is, thus I can
eventually let the application sleep and retry if there are any other heavy
queries in progress.
--
Tobias Brox, +47-91700050
Nordicbet, IT dept
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To: pgsql-performance@postgresql.org
Cc: tobias@nordicbet.com
Subject: Re: "nice"/low priority Query
In-Reply-To: <20050802195915.GA9691@tobias.lan>
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