From: Tom Lane <tgl@sss.pgh.pa.us>
To: Wells Oliver <wells.oliver@gmail.com>
cc: Ron <ronljohnsonjr@gmail.com>, pgsql-admin@lists.postgresql.org
Subject: Re: Diagnosing a massive toast file
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Comments: In-reply-to Wells Oliver <wells.oliver@gmail.com>
	message dated "Mon, 05 Aug 2019 10:03:02 -0700"
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Date: Mon, 05 Aug 2019 13:24:27 -0400
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Wells Oliver <wells.oliver@gmail.com> writes:
> As a follow up, n_dead_tup from pg_stat_sys_tables for this TOAST table is
> 7447444, live tuples, 623982, and tup_del 20823469. vacuum_count is 0.

> Why can't I free those rows up?

Old open transaction somewhere (possibly a prepared transaction?).
Or a replication slot that's holding back the xmin horizon due to
not keeping up.

			regards, tom lane