[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

Emily Lamancusa <emily.lamancusa at montgomerycountymd.gov> changed:

           What    |Removed                     |Added
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 Attachment #145950|0                           |1
        is obsolete|                            |

--- Comment #32 from Emily Lamancusa <emily.lamancusa at montgomerycountymd.gov> ---
Created attachment 146020
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=146020&action=edit
Bug 32558: Add ability for background_jobs_worker.pl to process multiple jobs
simultaneously up to a limit

Right now background_jobs_worker.pl only processes jobs in serial. It would
make sense to handle jobs in parallel up to a user definable limit.

Test Plan:
1) Apply this patch
2) Stop background_jobs_worker.pl
3) Generate some background jobs by editing records, placing holds, etc
4) Watch processes in a new terminal: watch -n 0.1 'ps aux | grep
background_jobs_worker.pl'
5) Run background_jobs_worker.pl with parameter -m 3 or some other
   number of max processes
6) Note the multiple forked processes in the ps output

Test notes - also tested the following on KTD:
1. Stop background_jobs_worker.pl
2. Edit /etc/koha/sites/kohadev/koha-conf.xml - set max_processes to 10
3. Generate some background jobs
4. Watch processes in a new terminal: watch -n 0.1 'ps aux | grep
background_jobs_worker.pl'
5. Restart all
6. Confirm multiple forked processes in the ps output

Both methods work as expected and generate multiple forked processes
based on the value set for max processes.

Signed-off-by: emlam <emily.lamancusa at montgomerycountymd.gov>

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