On Wed, 18 Mar 2009, Heikki Linnakangas wrote:
A linked list or an array of in-progress writes was my first thought as well. But the real problem is: how does the reader wait until all WAL up to X have been written? It could poll, but that's inefficient.
Good point - waiting for an exclusive lock on a page is a pretty easy way to wake up at the right time.
However, is there not some way to wait for a notify? I'm no C expert, but in Java that's one of the most fundamental features of a lock.
Matthew -- A bus station is where buses stop. A train station is where trains stop. On my desk, I have a workstation. - Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
