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: <[email protected]> Branch ------ REL9_1_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/5551dac59c0601b49d57a3f897fb0a6d581e58ac Modified Files -------------- src/backend/commands/vacuum.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
