Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions

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От Prabhjot Sheena
Тема Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions
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Msg-id CAOf_bQZOzUfLSe9cQJ6hLJ9UuVhbCTQFGm=hm5df3GZoZnMcRg@mail.gmail.com
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Ответ на Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions
Re: [ADMIN] WARNING: database must be vacuumed within 8439472 transactions
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So this is what i did but my problem is still not going away.

i shutdown the database and started it in single user mode and issued command vacuum full

The command completed but the issue still exists

The thing i noticed is that whenever i start the database autovaccum automatically starts on one table all the time like this
autovacuum: VACUUM public.hotel_site_market (to prevent wraparound)

This same auto vacuum is running since the problem started. i tried to cancel it using pg_cancel_backend but it starts again. i did a vacuum full public.hotel_site_market and the statement completes but again it starts running.

i checked the stats using this

caesius=# select relname, age(relfrozenxid) from pg_class where relkind = 'r' order by 2 desc;
WARNING:  database "caesius" must be vacuumed within 1648680 transactions
HINT:  To avoid a database shutdown, execute a full-database VACUUM in "caesius".
                      relname                       |    age
----------------------------------------------------+------------
 hotel_site_market                                  | 2145834967
 cc_table_data                                      |    198017413

Even after running the full vacuum the stats are not changing and this autovacuum: VACUUM public.hotel_site_market (to prevent wraparound) keeps coming back i m getting this message as well

WARNING:  database prod01 must be vacuumed within 1648687 transactions

Pls let me know what i should do on this

Thanks
avi



On Mon, Jul 7, 2014 at 4:14 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
John R Pierce <pierce@hogranch.com> writes:
> On 7/7/2014 2:14 PM, Prabhjot Sheena wrote:
>> i will run full vacuum than and see how it goes.

> do make sure there aren't any OLD pending transactions hanging around.

Not only regular transactions, but prepared transactions:

select * from pg_prepared_xacts;

8.3 was the last release in which max_prepared_transactions was nonzero
by default, thereby allowing people to shoot themselves in the foot
this way without having taken off the safety first :-(

                        regards, tom lane


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