Re: Priorities for users or queries?

From: Magnus Hagander <magnus(at)hagander(dot)net>
To: Adam Rich <adam(dot)r(at)sbcglobal(dot)net>
Cc: 'Benjamin Arai' <benjamin(at)araisoft(dot)com>, pgsql-general(at)postgresql(dot)org
Subject: Re: Priorities for users or queries?
Date: 2007-02-11 09:34:51
Message-ID: 45CEE33B.8020303@hagander.net
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Most likely, you do not want to do this. You *can* do it, but you are
quite likely to suffer from priority inversion
(http://en.wikipedia.org/wiki/Priority_inversion)

//Magnus

Adam Rich wrote:
> There is a function pg_backend_pid() that will return the PID for
> the current session. You could call this from your updating app
> to get a pid to feed to the NICE command.
>
>
> -----Original Message-----
> From: pgsql-general-owner(at)postgresql(dot)org
> [mailto:pgsql-general-owner(at)postgresql(dot)org] On Behalf Of Benjamin Arai
> Sent: Saturday, February 10, 2007 6:56 PM
> To: pgsql-general(at)postgresql(dot)org; pgsql-admin(at)postgresql(dot)org
> Subject: [GENERAL] Priorities for users or queries?
>
>
> Hi,
>
> Is there a way to give priorities to queries or users? Something
> similar to NICE in Linux. My goal is to give the updating (backend)
> application a very low priority and give the web application a high
> priority to avoid disturbing the user experience.
>
> Thanks in advance!
>
> Benjamin
>
>
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