> That's kind of my point. :) That 14GB isn't allocated to cache, buffers, > any process, or anything else. It's just... free. In the middle of the > day, where 800 PG threads are pulling 7000TPS on average. Based on that > scenario, I'd like to think it would cache pretty aggressively, but > instead, it's just leaving 14GB around to do absolutely nothing. > > It makes me sad. :(
Yeah, this is why I want to go to Linux Plumbers this year. The Kernel.org engineers are increasingly doing things which makes Linux unsuitable for applications which depend on the filesystem. There is a good, but sad, reason for this: IBM and Oracle and their partners are the largest employers of people hacking on core Linux memory/IO functionality, and both of those companies use DirectIO extensively in their products. -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
