Re: postgresql transaction id monitoring with nagios

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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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