On Tue, 2008-03-25 at 17:26 -0300, Alvaro Herrera wrote: > There is one hole here: contention on ProcArrayLock. Basically, for > simple transactions we will need to update MyProc after every command.
If we're just updating MyProc->xmin, we only need to acquire ProcArrayLock in shared mode, right? > Another idea is to throttle the updating of Xmin so it only happens once > in a while, but it's difficult to find a useful criterion and avoid > falling into the trap that we just neglected to update it before a large > command. Using LWLockConditionalAcquire() might help also. -Neil -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
