> It would require only very minor changes in the main backend code to
> eliminate entirely the hard-wired upper bound MAXBACKENDS. This would
> be nice since there'd never be any need to recompile in order to
> increase the soft limit MaxBackends (-N). However I see that the
> SysV-semaphore em
> > Conditional variables seem to be more portable
>
> Really? Which standard are they specified in?
POSIX - they are in pthread library (eg man pthread_cond_init).
For sem_init I see in man (on Solaris and AIX):
ENOSYS The sem_init() function is not supported
what is exactly I've got on AIX
"Mikheev, Vadim" <[EMAIL PROTECTED]> writes:
>> What I'd like to look at sometime soon is using POSIX semaphores
>> instead of SysV semaphores. But we need stateful semaphores,
>> not signals.
> Conditional variables seem to be more portable
Really? Which standard are they specified in?
I hav
> > Did you ever consider remove per-backend semaphores at all?
> > We use them to sleep waiting for lock (ie when someone awake
> > us by changing our semaphore) - why don't use sigpause and
> > some signal?
>
> That'll fail if the signal arrives before the sigpause(), no?
Ops, you're right.
>
"Mikheev, Vadim" <[EMAIL PROTECTED]> writes:
> Did you ever consider remove per-backend semaphores at all?
> We use them to sleep waiting for lock (ie when someone awake
> us by changing our semaphore) - why don't use sigpause and
> some signal?
That'll fail if the signal arrives before the sigpa
> I'm not thinking about getting this done in time for 7.1, but I think
> it'd be a nice cleanup for 7.2.
>
> Bruce, a TODO item please:
> * Remove compile-time upper limit on number of backends
> (MAXBACKENDS)
Did you ever consider remove per-backend semaphores at all?
We use them to sleep w
It would require only very minor changes in the main backend code to
eliminate entirely the hard-wired upper bound MAXBACKENDS. This would
be nice since there'd never be any need to recompile in order to
increase the soft limit MaxBackends (-N). However I see that the
SysV-semaphore emulation co
