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runserver_plus constantly uses about 30% of one CPU

See original GitHub issue

Hey there,

I’m really pleased with runserver_plus but found today that it uses 30% of one CPU (according to top & htop)

When I run strace on the process, I see thousands of stat calls. I guess it’s checking all my files (even libraries) for changes.

I’m on Linux – Ubuntu 14.04 “trusty”. Is there any way to enable an alternative to this exhaustive polling on my platform, other than --noreload?

Thanks! Evan

Issue Analytics

State:
Created 9 years ago
Reactions:1
Comments:8 (8 by maintainers)

Top GitHub Comments

1reaction

ezheidtmanncommented, Feb 19, 2015

I think I may have answered my own question: The problem lies in werkzeug, which once supported inotify but no longer does.

In the 0.10 release notes, this is the latest mention of inotify:

Version 0.7.1 (bugfix release, released on July 26th 2011)

Fixed a problem with newer versions of IPython. Disabled pyinotify based reloader which does not work reliably.

http://werkzeug.pocoo.org/docs/0.10/changes/

0reactions

sbnbcommented, Feb 27, 2015

Thanks a lot trbs.

Passing ‘–reloader-interval N’ works as expected.

as does putting RUNSERVERPLUS_POLLER_RELOADER_INTERVAL = 5 in the settings file.