| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Samplonius <tom(at)sdf(dot)com> |
| Cc: | Alfred Perlstein <bright(at)wintelcom(dot)net>, Larry Rosenman <ler(at)lerctr(dot)org>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: RE: [COMMITTERS] pgsql/src/backend/access/transam ( xact.c xlog.c) |
| Date: | 2000-11-17 17:16:06 |
| Message-ID: | 200011171716.MAA25108@candle.pha.pa.us |
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| Thread: | |
| Lists: | pgsql-hackers |
> > 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.
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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