[Koha-bugs] [Bug 32558] Allow background_jobs_worker.pl to process multiple jobs simultaneously up to a limit

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=32558

--- Comment #41 from Marcel de Rooy <m.de.rooy at rijksmuseum.nl> ---
(In reply to David Cook from comment #40)
> (In reply to Marcel de Rooy from comment #35)
> > Not sure (yet) but should the default not be zero? Just do not fork like we
> > currently do?
> 
> The job needs to run in a forked process. The memory used by the job can be
> reclaimed when the child process ends - whereas the memory will never be
> reclaimed by the OS if the process doesn't fork. (The memory can be re-used
> if it's internally freed within Perl but can't be reclaimed by the OS.)

Probably you misread my comment ;) My formulations are compact.
Note that this patch leaves the original fork in the process_job sub. To keep
current behavior (parent process, 1 fork in process_job) the default should be
zero. Not one.
"Just do not fork" refers to the extra fork that we introduce here around
calling process_job. And that actually introduces a double fork that we might
want to get rid of too..
So the default could be 1 IF we remove the fork in the sub.

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