I have a mysql + django + uwsgi + nginx application and I recently had some issues with uwsgi's default configuration so I want to reconfigure it but I have no idea what the recommended values are.
Another problem is that I couldn't find the default settings that uwsgi uses and that makes debugging really hard.
Using the default configuration, the site was too slow under real traffic (too many requests stuck waiting for the uwsgi socket). So I used a configuration from some tutorial and it had cpu-affinity=1 and processes=4 which fixed the issue. The configuration also had limit-as=512 and now the app gets MemoryErrors so I guess 512MB is not enough.
My questions are:
How can I tell what the recommended settings are? I don't need it to be super perfect, just to handle the traffic in a descent way and to not crash from memory errors etc. Specifically the recommended value for limit-as is what I need most right now.
What are the default values of uwsgi's settings?
Thanks!
We run usually quite small applications... Rarely more than 2000 requests per minute. But anyway its is hard to compare different applications. Thats what we use on production:
Recommendation by the documentation
Haharakiri = 20 # respawn processes taking more than 20 seconds
limit-as = 256 # limit the project to 256 MB
max-requests = 5000 # respawn processes after serving 5000 requests
daemonize = /var/log/uwsgi/yourproject.log # background the process & log
uwsgi_conf.yml
processes: 4
threads: 4
# This part might be important too, that way you limit the log file to 200 MB and
# rotate it once
log-maxsize : 200000000
log-backupname : /var/log/uwsgi/yourproject_backup.log
We use the following project for deployment and configuration of our django apps. (No documentation here sorry... Just used it internally)
How can you tell if you configured it correctly... ? Since it depends much on your application I would recommend to use some monitoring tools such as newrelic.com and analyse it.