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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Ron Johnson <ronljohnsonjr@gmail.com>
cc: Pgsql-admin <pgsql-admin@lists.postgresql.org>
Subject: Re: vacuumdb and a long list of tables
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Comments: In-reply-to Ron Johnson <ronljohnsonjr@gmail.com>
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Ron Johnson <ronljohnsonjr@gmail.com> writes:
> Is there any specific order by which "vacuumdb -t t1 -t t2 -t t3 ..."
> processes those tables?

A quick look at the source code finds

	appendPQExpBufferStr(&catalog_query, " ORDER BY c.relpages DESC;");

so apparently it's trying to process them in descending size order,
although this doesn't account for indexes or toast tables.

			regards, tom lane