Rework MultiXactId cache code The original performs too poorly; in some scenarios it shows way too high while profiling. Try to make it a bit smarter to avoid excessive cosst. In particular, make it have a maximum size, and have entries be sorted in LRU order; once the max size is reached, evict the oldest entry to avoid it from growing too large.
Per complaint from Andres Freund in connection with new tuple freezing code. Branch ------ REL9_3_STABLE Details ------- http://git.postgresql.org/pg/commitdiff/0bc00363b9b1d5ee44a0b25ed2dfc83f81e68258 Modified Files -------------- src/backend/access/transam/multixact.c | 52 ++++++++++++++++++++++++++------ 1 file changed, 42 insertions(+), 10 deletions(-) -- Sent via pgsql-committers mailing list ([email protected]) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-committers
