PATCH to allow concurrent VACUUMs to not lock each other out from cleaning old tuples - Mailing list pgsql-patches

The attached patch allows VACUUMS's on small relations to clean up dead
tuples while VACUUM or ANALYSE is running for a long time on some big
table.

This is done by adding a "bool inVacuum" to PGPROC and then making use
of it in GetOldestXmin.

This patch is against current CVS head, but should also apply to 8.0.2
with minorpach  warnings.

--
Hannu Krosing <hannu@tm.ee>