RSync CPU resource usage

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NismoC32

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Aug 6, 2018
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I did some file backup from my QNAP nas to my FreenNAS using rsync and
during file transfer the WEBUI was barely responding so I did run top in a shell and
noticed that the rsync process had a PRI (Priority) of 106, aren't this way high ?

My CPU is a Intel Core i7-3930K CPU @ 3.20GHz (12 cores)

What is the best way to change the default priority for rsync processes ?
 
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mav@

iXsystems
iXsystems
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Sep 29, 2011
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There is a ticket (https://redmine.ixsystems.com/issues/39932), fixing which is expected to reduce rsync CPU usage in half in FreeNAS 11.2-RC1.

Thread priorities are dynamically updated by scheduler based on their "nice" level. Those may be tuned with nice and renice utilities, but I think it is very rare when users may need to do that.
 
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