Fetch XIDs atomically during vac_truncate_clog(). Because vac_update_datfrozenxid() updates datfrozenxid and datminmxid in-place, it's unsafe to assume that successive reads of those values will give consistent results. Fetch each one just once to ensure sane behavior in the minimum calculation. Noted while reviewing Alexander Korotkov's patch in the same area.
Discussion: <8564.1464116...@sss.pgh.pa.us> Branch ------ REL9_5_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/bbbe2c97eba37fd8a9e580a596f48935f3d9ded8 Modified Files -------------- src/backend/commands/vacuum.c | 28 ++++++++++++++++++---------- 1 file changed, 18 insertions(+), 10 deletions(-) -- Sent via pgsql-committers mailing list (pgsql-committers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
