On Mon, Aug 7, 2017 at 1:51 PM, Alvaro Herrera <alvhe...@2ndquadrant.com> wrote: > * the whole predicate.c stuff is written using SHM_QUEUE. I suppose > SHM_QUEUE works just fine, but predicate.c was being written at about > the same time (or a bit earlier) than the newer ilist.c interface was > being created, which I think had more optimization work thrown in. > Maybe it would be good for predicate.c to ditch use of SHM_QUEUE and > use ilist.c interfaces instead? We could even think about being less > strict about holding exclusive lock on SerializableFinished for the > duration of ClearOldPredicateLocks, i.e. use only a share lock and > only exchange for exclusive if a list modification is needed.
I think we should rip SHM_QUEUE out completely and get rid of it. It doesn't make sense to have two implementations, one of which by its name is only for use in shared memory. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers