Mladen Gogala <mladen.gogala@xxxxxxxxxxx> wrote: > May I ask what exactly is "sinval"? I took a look at Craig's > problem and your description but I wasn't able to figure out what > is sinval lock and what does it lock? I apologize if the question > is stupid. This area could probably use a README file, but you can get a good idea from the comment starting on line 30 of this file: http://git.postgresql.org/gitweb?p=postgresql.git;a=blob;f=src/backend/storage/ipc/sinvaladt.c;h=7910346dd55512be13712ea2342586d705bb0b35 It has to do with communication between processes regarding invalidation of the shared cache. -Kevin -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance