On Oct 4, 2010, at 11:06, Greg Stark <gsst...@mit.edu> wrote: > I guess by "lock-free in the uncontended case" they mean the buffer > cache manager is lock-free unless you're actually contending on the > same buffer?
That refers to being able to acquire non-conflicting row/table locks without needing an exclusive LWLock, and acquiring shared LWLocks without spinlocks if possible. I think the buffer cache manager is the next bottleneck after the row/table lock manager. Seems like it would also be a good candidate for similar techniques, but that's totally uninformed speculation on my part. Dan -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
