Re: RE: [COMMITTERS] pgsql/src/backend/access/transam ( xact.c xlog.c)
Larry Rosenman <ler@lerctr.org>
From: Larry Rosenman <ler@lerctr.org>
To: Bruce Momjian <pgman@candle.pha.pa.us>
Cc: Tom Samplonius <tom@sdf.com>, Alfred Perlstein <bright@wintelcom.net>, pgsql-hackers@postgresql.org
Date: 2000-11-17T17:26:22Z
Lists: pgsql-hackers
* Bruce Momjian <pgman@candle.pha.pa.us> [001117 11:23]: > > > sleep(3) should conform to POSIX specification, if anyone has the > > > reference they can check it to see what the effect of sleep(0) > > > should be. > > > > Yes, but Posix also specifies sched_yield() which rather explicitly > > allows a process to yield its timeslice. No idea how well that is > > supported. > > I have it on BSDI. We could add a configure check, and use it if it is > there. Another idea is to add a shared memory flag when someone enters > the 'commit' section of the transaction code. That way, a backend could > check to see if another process is _about_ to commit, and wait. On UnixWare, it requires the -Kthread or -Kpthread command, which then links in the threads library... I'm not sure that this is a good thing or not.... LER -- Larry Rosenman http://www.lerctr.org/~ler Phone: +1 972-414-9812 (voice) Internet: ler@lerctr.org US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749