[erlang-questions] max timeout
Tue Aug 19 13:39:53 CEST 2008
Matt, thanks, that was the thread! And this was Ulf's statement that
seemed to have settled in my memory:
"...you cannot use timeout values that are larger than a smallint."
So from that thread and your "executive summary" below, it's still not
clear which one is the upper limit for the timeout:
1. 2^32 (this is what's documented, but only seems to work in the shell)
2. 2^32-1 = 49.5 days
3. Erlang's small integers (2^27-1 = 1.5 days)
I still claim that the reference manual documentation ch. 6.10 is not
accurate and leaves room for questions.
Matthias Lang wrote:
> On Monday, August 18, Serge Aleynikov wrote:
>> For some reason I have a vague recollection (that may very well be
>> wrong) that when this subject was discussed on the list before the
>> actual timeout number was less then 2^32... I have a case when I need
>> to put a process to sleep for up to a couple of days (e.g. not to run on
>> a weekend) - in practice I am doing a loop sleep with a smaller timeout
>> to compensate for time drifts and clock adjustments, but nevertheless
>> this question came up about a practical upper bound.
> This may be the thread you remember, it starts here:
> Executive summary: In R11B-2, a timeout of 16#ffffFFFF doesn't work as
> expected on a 32-bit machine. Something changed between R11B-2 and
> R11B-5 which made it work in the shell, but still not in compiled
> code. I haven't noticed anything in the release notes saying it's
> been fixed for real.
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