Re: [GENERAL] Table not cleaning up drom dead tuples

On Tue, Mar 14, 2017 at 5:09 AM, Антон Тарабрин <tarabanton@gmail.com> wrote:

Good day. It seems that we have some strange case of VACUUM malfunction and table bloating.

PostgreSQL 9.5.3

Are you using replication slots?

See this, fixed in 9.5.5:

commit de396a1cb34626619ddc6fb9dec6d12abee8b589

Author: Andres Freund <andres@anarazel.de>

Date:   Wed Aug 17 13:15:03 2016 -0700

    Properly re-initialize replication slot shared memory upon creation.

    Slot creation did not clear all fields upon creation. After start the

    memory is zeroed, but when a physical replication slot was created in

    the shared memory of a previously existing logical slot, catalog_xmin

    would not be cleared. That in turn would prevent vacuum from doing its

    duties.

Cheers,

Jeff