[Koha-bugs] [Bug 29507] Speed up auto renew cronjob via parallel processing

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

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=29507

--- Comment #1 from Nick Clemens <nick at bywatersolutions.com> ---
Created attachment 127743
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https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=127743&action=edit
Bug 28833: Speed up auto renew cronjob via parallel processing

The cron can take a very long time to run on systems with many issues. For
example, a partner with ~250k auto_renew issues is taking about 9 hours to run.

If we run that same number of holds in 5 parallel chunks ( splitting the number
of issues as evenly as possible, it could take under 2 hours.

Test Plan:
0) Install the Perl library Parallel::ForkManager
1) Generate a number of issues marked for auto_renew
2) Run the automatic_renewals.pl, use the `time` utility to track how much time
it took to run
3) Set parallel_loops to 10 in auto_renew_cronjob section of config in
koha-conf
4) Repeat step 2, note the improvement in speed
5) Experiment with other values

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