[jira] [Resolved] (SLING-5255) Jobs: allow to configure queue.maxparallel in terms of % of number of CPU cores

["Carsten Ziegeler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SLING-5255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Carsten Ziegeler resolved SLING-5255.
-------------------------------------
    Resolution: Fixed

Thanks for your patch, it's applied

> Jobs: allow to configure queue.maxparallel in terms of % of number of CPU cores 
> --------------------------------------------------------------------------------
>
>                 Key: SLING-5255
>                 URL: https://issues.apache.org/jira/browse/SLING-5255
>             Project: Sling
>          Issue Type: Improvement
>          Components: Extensions
>            Reporter: Alexander Klimetschek
>            Assignee: Carsten Ziegeler
>             Fix For: Event 4.1.0
>
>         Attachments: SLING-5255.patch
>
>
> The {{queue.maxparallel}} setting (how many concurrent threads can run for a given job queue) currently supports a fixed number of threads or -1 which means "as many CPU cores present on the machine". The latter is in our case used as a crucial default, but it's too aggressive, since it might take over all CPU processing.
> Since every machine has different numbers of CPUs and cores, it would be useful to express this config as % of number of CPU cores. This allows for example for a default setting of 50% that should work well on different machines without having to manually configure it on each instance.
> This could either be a separate setting or (better) maybe allow floating point numbers between 0.0 and 1.0 to express the percentage for the existing {{queue.maxparallel}}. E.g. 0.5 means 50% of the cores. If it's an integer, continue to use it as an exact number of threads to use.



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