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Description:

pyuwsgimemhog 0.3.0

pyuwsgimemhog

Do you want to find out which path of your application running under uWSGI
is leaking memory?
pyuwsgimemhog parses uWSGI logs to point out which paths contributes to
uWSGI processes RSS memory increase.

Installation
pip install pyuwsgimemhog

Requirements
In order to have the needed information you have to run uWSGI with the
memory-report enabled.
Please note that it’s possible to have meaningful results only if you
are using one thread per process.

Use from the command line
You need to pass a single uWSGI log file to pyuwsgimemhog:
pyuwsgimemhog --logfile /path/to/log
/api 975 200 4.9
/another-api 502 2 251
That means that /api contributed to increase the memory usage by 975 MB,
it has been accounted 200 times and it contributed 4.9 MB per call.
/another-api contributed 502 MB in two occurences so 251MB per call.

Use as a library
In addition to using pyuwsgimemhog as a command line utility, it can also be
used as a library. This allows passing a custom path normalization function
into the log analyzer in order to group requests based on that URL path.
A trivial example of using the Django URL resolver in order to normalize URLs
would be the following:
from django.urls import resolve, Resolver404
from pyuwsgimemhog.pyuwsgimemhog import normalize_path, uwsgimemhog
from urllib.parse import urlparse

def normalize(url):
try:
return resolve(urlparse(url).path).view_name
except Resolver404:
# This view was not handled by Django so fall back to the default
# normalization. Use normalize_path_with_nums to normalize numbers
# in path to 0.
return normalize_path(url)

with open(logfile, 'r') as f:
for view, memory, count in uwsgimemhog(
f, threshold * 1_000_000, normalize):
print('{} {} {} {:.1f}'.format(
view, memory // 1_000_000, count, memory / count / 1_000_000
))

License
MIT license

Credits
This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

History

0.3.0 (2021-04-24)

Make it possible to pass a custom normalization function (Terence D. Honles)
Fix regular expression to require RSS (Terence D. Honles)
Use Github actions instead of Travis (Terence D. Honles)

0.2.0 (2020-01-10)

Count and show occurrences and per call leak count.

0.1.0 (2019-04-12)

First release on PyPI.