Re: To avoid a database shutdown, execute a database-wide VACUUM

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2016-03-02 15:01 GMT+01:00 Jean-Baptiste Vedel <jb(dot)vedel(at)gmail(dot)com>:

> Hello,
>
> I was unable to execute VACUUM in zabbix database because VACUUM process
> was stuck in WAITING status.
> Using vacuum in "single user mode" seems to solve this problem.
>
> /usr/pgsql-9.4/bin/postgres --single -D /dbzab/data -O zabbix backend>
> VACUUM FULL;
>
> I hope everything will be ok, i m waiting the end of VACUUM process.
>
>
You didn't need to launch a VACUUM FULL. A VACUUM would have been enough.

> Do you think that i need to commit somme transactions after VACUUM ends ?
>
>
Which transactions as you said you were in single mode? :)

Moreover, there's no way you can commit transactions on other sessions.

> < 2016-03-02 07:04:19.406 CET >WARNING: database "zabbix" must be
> vacuumed within 7989357 transactions
> < 2016-03-02 07:04:19.406 CET >HINT: To avoid a database shutdown,
> execute a database-wide VACUUM in that database.
> -> You might also need to commit or roll back old prepared transactions.
>
>
Oh, so you were speaking about prepared transactions. I'm pretty sure you
don't have any.

> Best Regards,
>
>
>
> 2016-03-02 10:05 GMT+01:00 Guillaume Lelarge <guillaume(at)lelarge(dot)info>:
>
>> Hi,
>>
>> 2016-03-02 8:04 GMT+01:00 Jean-Baptiste Vedel <jb(dot)vedel(at)gmail(dot)com>:
>>
>>> Hello,
>>>
>>> I've got a problem with my postgresql database 9.4 this morning.
>>> Few days ago we've moved many data in the database to create new data
>>> partitions and delete many entries.
>>> Auto-vacuum seems to be inefficient and i am unable to vacuum my zabbix
>>> database.
>>> Do you have any idea about this problem ?
>>>
>>> < 2016-03-02 07:04:19.406 CET >WARNING: database "zabbix" must be
>>> vacuumed within 7989357 transactions
>>> < 2016-03-02 07:04:19.406 CET >HINT: To avoid a database shutdown,
>>> execute a database-wide VACUUM in that database.
>>>
>>>
>> Why are you unable to VACUUM your zabbix database? because it is the
>> solution to your issue.
>>
>>
>> --
>> Guillaume.
>> http://blog.guillaume.lelarge.info
>> http://www.dalibo.com
>>
>
>

--
Guillaume.
http://blog.guillaume.lelarge.info
http://www.dalibo.com