On Tue, Mar 7, 2017 at 9:44 PM, Robert Haas <robertmh...@gmail.com> wrote: > I mean, IIUC, the call to PrefetchBuffer() is not done under any lock. > And that's the slow part. The tiny amount of time we spend updating > the prefetch information under the mutex should be insignificant > compared to the cost of actually reading the buffer. Unless I'm > missing something.
Okay, but IIUC, the PrefetchBuffer is an async call to load the buffer if it's not already in shared buffer? so If instead of one process is making multiple async calls to PrefetchBuffer, if we make it by multiple processes will it be any faster? Or you are thinking that at least we can make BufTableLookup call parallel because that is not an async call. -- Regards, Dilip Kumar EnterpriseDB: http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers