On 10/27/2015 07:44 AM, Andres Freund wrote:
>> Unlinking old pg_clog files is strictly an optimization. If you were to
>> > comment out every unlink() call in slru.c, the only ill effect on CLOG is the
>> > waste of disk space. Is the same true of MultiXact?
> Well, multixacts are a lot larger than the other SLRUs, I think that
> makes some sort of difference.
And by "a lot larger" we're talking like 50X to 100X. I regularly see
pg_multixact directories larger than 1GB.
--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com
