Tom Lane wrote: > > Gregory Stark wrote: > >> I wonder how hard it would be to shove the clog into regular shared memory > >> pages and let the clock sweep take care of adjusting the percentage of > >> shared > >> mem allocated to the clog versus data pages.
> My recollection is that we didn't do that because the standard buffer > manager has some assumptions that are violated by clog/etc pages --- > notably the lack of LSNs on the pages. Not sure how hard that is to > fix. I also note that we'd not really be removing any contention, > rather just pushing it into the bufmgr. Maybe the bufmgr is now > scalable enough that it could take the extra load better than SLRU can, > but this is hardly a given. Well, in the case of pg_subtrans, I don't think the problem is contention -- rather, the fact that the number of buffers is fixed and small. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc. ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
