Re: Problems with autovacuum and vacuum

Hello, Filip

2011/1/1 Filip Rembiałkowski <plk(dot)zuber(at)gmail(dot)com>

>
> 2010/12/30 JotaComm <jota(dot)comm(at)gmail(dot)com>
>
>> Hello,
>>
>> Last week I had a serious problem with my PostgreSQL database. My
>> autovacuum is OFF, but in September it started to prevent the transaction
>> wraparoud; however last week the following message appeared continuously in
>> my log:
>>
>> WARNING: database "production" must be vacuumed within 4827083
>> transactions
>> HINT: To avoid a database shutdown, execute a full-database VACUUM in
>> "production".
>>
>> This message appeared for five to six hours; after that, the message
>> disappeared from log. Any idea about what could have happened?
>>
>>
>
> probably another "wraparaund-forced" autovacuum worker did the job, so the
> warnings disappeared
>
>
>
>> Every day the vacuum is executed on some tables; and on Sundays it's
>> executed on all tables. But as the autovacuum is running since September,
>> and it runs for a long time, the vacuum was blocked because autovacuum had
>> been running on the same table. How should I procede in this case?
>>
>
>
> hmm. single vacuum process runs for more than 3 months on a table with
> 1000000000 rows?
> this is ... less than 128 rows/second, not good.
>
> I would rather terminate this old process, and start a VACUUM VERBOSE when
> the database is less loaded.
>
>
> How many INS/UPD/DEL you have on this table?
>

About 15 millions rows inserted by day.

>
>
>
> PS. When you fix this, enable autovacuum, to avoid more problems...
>
>
>
>
Regards,

João Paulo

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