From: Alvaro Herrera <alvherre@commandprompt.com>
To: Vivek Khera <vivek@khera.org>
Cc: Pgsql performance <pgsql-performance@postgresql.org>
Subject: Re: postgresql transaction id monitoring with nagios
Date: Tue, 2 May 2006 15:03:40 -0400
Message-ID: <20060502190340.GG15291@surnet.cl> (raw)
In-Reply-To: <628A837A-9718-46BB-85D7-8A63BBB1CA32@khera.org>
References: <6d8daee30605021126o7b44e255q552dcdc676c565bf@mail.gmail.com>
<628A837A-9718-46BB-85D7-8A63BBB1CA32@khera.org>
Vivek Khera wrote:
>
> On May 2, 2006, at 2:26 PM, Tony Wasson wrote:
>
> >The script detects a wrap at 2 billion. It starts warning once one or
> >more databases show an age over 1 billion transactions. It reports
> >critical at 1.5B transactions. I hope everyone out there is vacuuming
> >*all* databases often.
>
> Something seems wrong... I just ran your script against my
> development database server which is vacuumed daily and it said I was
> 53% of the way to 2B. Seemed strange to me, so I re-ran "vacuum -a -
> z" to vacuum all databases (as superuser), reran the script and got
> the same answer.
That's right, because a database's age is only decremented in
database-wide vacuums. (Wow, who wouldn't want a person-wide vacuum if
it did the same thing ...)
--
Alvaro Herrera http://www.CommandPrompt.com/
PostgreSQL Replication, Consulting, Custom Development, 24x7 support
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To: pgsql-performance@postgresql.org
Cc: alvherre@commandprompt.com, vivek@khera.org
Subject: Re: postgresql transaction id monitoring with nagios
In-Reply-To: <20060502190340.GG15291@surnet.cl>
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