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users/faq: Mention scanning and syncthing-inotify in relation to CPU usage

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GitHub-Pull-Request: https://github.com/syncthing/docs/pull/167
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Jakob Borg
2016-05-11 11:44:45 +00:00
committed by Stefan Tatschner
parent 0231d12897
commit 076ac1aa14
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@@ -129,6 +129,11 @@ Why does it use so much CPU?
#. There is a certain amount of housekeeping that must be done to track the #. There is a certain amount of housekeeping that must be done to track the
current and available versions of each file in the index database. current and available versions of each file in the index database.
#. By default Syncthing uses periodic scanning every 60 seconds to detect
file changes. This means checking every file's modification time and
comparing it to the database. This can cause spikes of CPU usage for large
folders.
Hashing, compression and encryption cost CPU time. Also, using the GUI Hashing, compression and encryption cost CPU time. Also, using the GUI
causes a certain amount of extra CPU usage to calculate the summary data it causes a certain amount of extra CPU usage to calculate the summary data it
presents. Note however that once things are *in sync* CPU usage should be presents. Note however that once things are *in sync* CPU usage should be
@@ -140,6 +145,11 @@ Syncthing should use at any given moment. For example, ``GOMAXPROCS=2`` on a
machine with four cores will limit Syncthing to no more than half the machine with four cores will limit Syncthing to no more than half the
system's CPU power. system's CPU power.
To reduce CPU spikes from scanning activity, use a filesystem notifications
plugin. This is delivered by default via Synctrayzor, Syncthing-GTK and on
Android. For other setups, consider using `syncthing-inotify
<https://github.com/syncthing/syncthing-inotify>`_.
Should I keep my device IDs secret? Should I keep my device IDs secret?
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