On Thu, May 15, 2014 at 11:36:51PM +0900, Amit Langote wrote: > > No, all memory allocat is per-process, except for shared memory. We > > probably need a way to record our large local memory allocations in > > PGPROC that other backends can see; same for effective cache size > > assumptions we make. > > > > I see. I thought there would be some centralised way to traverse, say, > a linked list of contexts that individual backends create or something > like that. But, I suppose it would not be straightforward to make any > of that work for what we are after here.
The problem is locking overhead between sessions. Right now we avoid all of that, and I think if we just put the value in PGPROC, it will be good enough with limited locking required. -- Bruce Momjian <br...@momjian.us> http://momjian.us EnterpriseDB http://enterprisedb.com + Everyone has their own god. + -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
