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From: Murthy Nunna <mnunna@fnal.gov>
To: pgsql-admin@postgresql.org <pgsql-admin@postgresql.org>
Subject: Vacuumdb on a table
Date: Wed, 18 Oct 2023 20:05:53 +0000
Message-ID: <DM8PR09MB66773DD56212C1EEF997ECDBB8D5A@DM8PR09MB6677.namprd09.prod.outlook.com> (raw)

Hi,

The first table in the following query resulted in age(c.relfrozenxid) = 148795396. But when I manually run vacuumdb command (vacuumdb -d db1 -t tab1) on that table it is not lowering the relfrozenxid. There is no indication in the pglog that vacuumdb failed.

SELECT c.oid::regclass
    , age(c.relfrozenxid)
    , pg_size_pretty(pg_total_relation_size(c.oid))
FROM pg_class c
JOIN pg_namespace n on c.relnamespace = n.oid
WHERE relkind IN ('r', 't', 'm')
AND n.nspname NOT IN ('pg_toast')
ORDER BY 2 DESC ;

I am wondering why vacuumdb is unable to lower relfrozenxid on this table? It seems to work on other tables though.

Thank you!

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  Cc: mnunna@fnal.gov
  Subject: Re: Vacuumdb on a table
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