Ron Johnson <ronljohnsonjr(at)gmail(dot)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