[IMP] odoo_sh: recurring questions about crons
opw-2058254
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Frequent Technical Questions
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==================================
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"Automated actions do not run at the exact time they were expected"
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On the Odoo.sh platform, we cannot guarantee an exact running time for automated actions.
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This is due to the fact that there might be multiple customers on the same server, and we must guarantee a fair share of the server for every customer. Automated actions are therefore implemented slightly differently than on a regular Odoo server, and are run on a *best effort* policy.
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.. warning::
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Do not expect any automated action to be run more often than every 5 min.
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Are there "best practices" regarding automated actions?
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-------------------------------------------------------
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**Odoo.sh always limits the execution time of automated actions (*aka* crons).**
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Therefore, you must keep this fact in mind when developing your own crons.
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We advise that:
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- Your automated actions should work on small batches of records.
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- Your automated actions should commit their work after processing each batch;
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this way, if they get interrupted by the time-limit, there is no need to start over.
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- Your automated actions should be
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`idempotent <https://stackoverflow.com/a/1077421/3332416>`_: they must not
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cause side-effects if they are started more often than expected.
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Can you install pycups or some similar library linked to `CUPS <https://www.cups.org/>`_ ?
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