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A simple uwsgi access log analyzer

Project description

uwsgi-sloth is a realtime uwsgi log analyer, designed for helping optimization of uwsgi app’s performance.

It can both generates a static report file or analyze your log file in realtime(demo).

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You should consider using uwsgi-sloth if your website are running under uwsgi and have no conception of how slow/fast your website is.



uwsgi-sloth is written in python, to install it, simply use pip:

# Install a stable version
$ pip install uwsgi-sloth

# Install the latest version from github
$ pip install -e git+

uwsgi-sloth now only supports Python3.5 and above, for Python2 users, please install uwsgi-sloth<3.0.0 instead.

Static report

After installation, you can analyzing your uwsgi log using uwsgi-sloth analyze command.

# Generate a report
$ uwsgi-sloth analyze -f uwsgi_access.log --output=report.html

# Specify threshold for request process time
$ uwsgi-sloth analyze -f uwsgi_access.log --output=report.html --min-msecs=400

Check more: uwsgi-sloth analyze

Realtime reports

We do support a more powerful feature: realtime uwsgi log report. It’s a little more complicated to configure.

First, create a default config file using uwsgi-sloth echo_conf:

uwsgi-sloth echo_conf > /data/uwsgi_sloth/myblog.conf

The default config file are like this:

# A sample uwsgi-sloth config file

# uwsgi log path, only support default log format
uwsgi_log_path = '/your_uwsgi_logs/web.log'

# All HTML files and data files will store here, must have read/write permissions
data_dir = '/you_data/uwsgi-sloth/'

# Minimal msecs for detect slow requests, default to 200
# min_msecs = 200

# Domain for your website, best given
domain = ''

# Custom url regular expressions file
# url_file = '/your_custom_url_file_path'

After modified uwsgi_log_path and data_dir, your can start uwsgi-sloth worker via uwsgi-sloth start -c /data/uwsgi_sloth/myblog.conf command, if everything goes fine, you will see some messages like this:

[2014-06-26 01:32:56,851] uwsgi_sloth INFO: Start from last savepoint, last_log_datetime: 2014-06-26 09:32:04
[2014-06-26 01:32:58,859] uwsgi_sloth INFO: Rendering HTML file /data/uwsgi_sloth/myblog/html/latest_5mins.html...
... ...

This may take several seconds if your log file are big.


uwsgi-sloth does not support built-in deamonize option, so you may need tools like supervisor to manage this process.

Serve your reports

Now, HTML files have been generated, we should configure our webserver so we can visit it, this configuration is for nginx:

$ cat /etc/nginx/sites-enabled/sloth_myblog.conf
server {

    listen   80;

    location / {
        root /data/uwsgi_sloth/myblog/html/;
        index "latest_5mins.html";

After reloading your nginx config, open your browser then you will see the fancy reports waiting for you.


uwsgi-sloth analyze

Available arguments

usage: uwsgi-sloth analyze [-h] -f FILEPATH [--output OUTPUT]
                           [--min-msecs MIN_MSECS] [--domain DOMAIN]
                           [--url-file URL_FILE]

optional arguments:
  -h, --help            show this help message and exit
  -f FILEPATH, --filepath FILEPATH
                        Path of uwsgi log file
  --output OUTPUT       HTML report file path
  --min-msecs MIN_MSECS
                        Request serve time lower than this value will not be
                        counted, default: 200
  --domain DOMAIN       Make url in report become a hyper-link by settings a
  --url-file URL_FILE   Customized url rules in regular expression
  --limit-url-groups LIMIT_URL_GROUPS
                        Number of url groups considered, default: 200
  --limit-per-url-group LIMIT_PER_URL_GROUP
                        Number of urls per group considered, default: 20

Using a customized url rules

First, get a list of url regular expressions.

$ cat url_rules
# A valid url_rules file are seperated regular expressions

Using –url-file to specify this url_rules

$ uwsgi-sloth analyze -f uwsgi_access.log --output=report.html --url-file=url_rules

uwsgi-sloth echo_conf

Print a default config file

uwsgi-sloth start

Start uwsgi-sloth worker to generate realtime report

$ uwsgi-sloth start -h
usage: uwsgi-sloth start [-h] -c CONFIG

optional arguments:
  -h, --help            show this help message and exit
  -c CONFIG, --config CONFIG
                        uwsgi-sloth config file, use "uwsgi-sloth echo_conf"
                        for a default one


  • Only default uwsgi log format is supported at present.
  • Tested under python 2.6/2.7
  • By default, uwsgi-sloth will classify url_path by replacing sequential digits part by ‘(d+)’: /users/3074/ -> /users/(\d+)

Any feedbacks are greatly welcomed!

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