On 30 June 2015 at 08:22, Simon Riggs <si...@2ndquadrant.com> wrote:
> This contention is masked by contention elsewhere, e.g. ProcArrayLock, so > the need for testing here should come once other patches ahead of this are > in. > Let me explain more clearly. Andres' patch to cache snapshots and reduce ProcArrayLock was interesting, but not initially compelling. We now have a solution that commits in batches, which will reduce the number of times the ProcArray changes - this will heighten the benefit from Andres' snapshot cache patch. So the order of testing/commit should be Queued commit patch ProcArray cache patch Clog shared commit patch (this one) I didn't hear recent mention of Robert's chash patch, but IIRC it was effective and so we hope to see it again soon also. -- Simon Riggs http://www.2ndQuadrant.com/ <http://www.2ndquadrant.com/> PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
