Re: [GENERAL] [SQL] pg_multixact issues

On 09/18/2014 10:22 AM, Dev Kumkar wrote:
> On Thu, Sep 18, 2014 at 6:20 PM, Dev Kumkar <devdas(dot)kumkar(at)gmail(dot)com
> <mailto:devdas(dot)kumkar(at)gmail(dot)com>> wrote:
>
> On Thu, Sep 18, 2014 at 4:03 PM, Andres Freund
> <andres(at)2ndquadrant(dot)com <mailto:andres(at)2ndquadrant(dot)com>> wrote:
>
> I don't think that's relevant for you.
>
> Did you upgrade the database using pg_upgrade?
>
>
> That's correct! No, there is no upgrade here.

The above sentence is not clear to me.

Did you run pg_upgrade to get the data into the database?

If not, how did the database get populated?

>
> Can you show pg_controldata output and the output of 'SELECT oid,
> datname, relfrozenxid, age(relfrozenxid), relminmxid FROM
> pg_database;'?
>
>
> Here are the details:
> oid datname datfrozenxid age(datfrozenxid) datminmxid
> 16384 myDB 1673 10872259 1
>
> Additionally wanted to mention couple more points here:
> When I try to run "vacuum full" on this machine then facing
> following issue:
> INFO: vacuuming "myDB.mytable"
> ERROR: MultiXactId 3622035 has not been created yet --
> apparent wraparound
>
> No Select statements are working on this table, is the table corrupt?
>
>
> Any inputs/hints/tips here?

Have you run the query from here?:

http://www.postgresql.org/docs/9.3/interactive/release-9-3-5.html

WITH list(file) AS (SELECT * FROM pg_ls_dir('pg_multixact/offsets'))
SELECT EXISTS (SELECT * FROM list WHERE file = '0000') AND
NOT EXISTS (SELECT * FROM list WHERE file = '0001') AND
NOT EXISTS (SELECT * FROM list WHERE file = 'FFFF') AND
EXISTS (SELECT * FROM list WHERE file != '0000')
AS file_0000_removal_required;

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com