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tuning-gunicorn.rst
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r1 | .. _increase-gunicorn: | |||
Increase Gunicorn Workers | ||||
------------------------- | ||||
r2205 | ||||
|RCE| comes with `Gunicorn`_ packaged in its Nix environment. | ||||
Gunicorn is a Python WSGI HTTP Server for UNIX. | ||||
r1 | ||||
r2205 | To improve |RCE| performance you can increase the number of `Gunicorn`_ workers. | |||
This allows to handle more connections concurently, and provide better | ||||
responsiveness and performance. | ||||
r1 | ||||
r2205 | By default during installation |RCC| tries to detect how many CPUs are | |||
available in the system, and set the number workers based on that information. | ||||
However sometimes it's better to manually set the number of workers. | ||||
To do this, use the following steps: | ||||
r1 | ||||
1. Open the :file:`home/{user}/.rccontrol/{instance-id}/rhodecode.ini` file. | ||||
2. In the ``[server:main]`` section, increase the number of Gunicorn | ||||
``workers`` using the following formula :math:`(2 * Cores) + 1`. | ||||
.. code-block:: ini | ||||
use = egg:gunicorn#main | ||||
r2205 | ## Sets the number of process workers. You must set `instance_id = *` | |||
## when this option is set to more than one worker, recommended | ||||
## value is (2 * NUMBER_OF_CPUS + 1), eg 2CPU = 5 workers | ||||
## The `instance_id = *` must be set in the [app:main] section below | ||||
workers = 4 | ||||
## process name | ||||
proc_name = rhodecode | ||||
## type of worker class, one of sync, gevent | ||||
## recommended for bigger setup is using of of other than sync one | ||||
r1 | worker_class = sync | |||
r2205 | ## The maximum number of simultaneous clients. Valid only for Gevent | |||
#worker_connections = 10 | ||||
## max number of requests that worker will handle before being gracefully | ||||
## restarted, could prevent memory leaks | ||||
r1 | max_requests = 1000 | |||
r2205 | max_requests_jitter = 30 | |||
## amount of time a worker can spend with handling a request before it | ||||
## gets killed and restarted. Set to 6hrs | ||||
timeout = 21600 | ||||
r1 | ||||
3. In the ``[app:main]`` section, set the ``instance_id`` property to ``*``. | ||||
.. code-block:: ini | ||||
# In the [app:main] section | ||||
[app:main] | ||||
# You must set `instance_id = *` | ||||
instance_id = * | ||||
r2205 | 4. Change the VCSServer workers too. Open the | |||
:file:`home/{user}/.rccontrol/{instance-id}/vcsserver.ini` file. | ||||
5. In the ``[server:main]`` section, increase the number of Gunicorn | ||||
``workers`` using the following formula :math:`(2 * Cores) + 1`. | ||||
.. code-block:: ini | ||||
## run with gunicorn --log-config vcsserver.ini --paste vcsserver.ini | ||||
use = egg:gunicorn#main | ||||
## Sets the number of process workers. Recommended | ||||
## value is (2 * NUMBER_OF_CPUS + 1), eg 2CPU = 5 workers | ||||
workers = 4 | ||||
## process name | ||||
proc_name = rhodecode_vcsserver | ||||
## type of worker class, currently `sync` is the only option allowed. | ||||
worker_class = sync | ||||
## The maximum number of simultaneous clients. Valid only for Gevent | ||||
#worker_connections = 10 | ||||
## max number of requests that worker will handle before being gracefully | ||||
## restarted, could prevent memory leaks | ||||
max_requests = 1000 | ||||
max_requests_jitter = 30 | ||||
## amount of time a worker can spend with handling a request before it | ||||
## gets killed and restarted. Set to 6hrs | ||||
timeout = 21600 | ||||
6. Save your changes. | ||||
7. Restart your |RCE| instances, using the following command: | ||||
r1 | ||||
.. code-block:: bash | ||||
r2205 | $ rccontrol restart '*' | |||
Gunicorn Gevent Backend | ||||
----------------------- | ||||
r1 | ||||
r2205 | Gevent is an asynchronous worker type for Gunicorn. It allows accepting multiple | |||
connections on a single `Gunicorn`_ worker. This means you can handle 100s | ||||
of concurrent clones, or API calls using just few workers. A setting called | ||||
`worker_connections` defines on how many connections each worker can | ||||
handle using `Gevent`. | ||||
To enable `Gevent` on |RCE| do the following: | ||||
1. Open the :file:`home/{user}/.rccontrol/{instance-id}/rhodecode.ini` file. | ||||
2. In the ``[server:main]`` section, change `worker_class` for Gunicorn. | ||||
r1 | ||||
.. code-block:: ini | ||||
r2205 | ## type of worker class, one of sync, gevent | |||
## recommended for bigger setup is using of of other than sync one | ||||
worker_class = gevent | ||||
## The maximum number of simultaneous clients. Valid only for Gevent | ||||
worker_connections = 30 | ||||
r1 | ||||
r2205 | ||||
.. note:: | ||||
`Gevent` is currently only supported for Enterprise/Community instances. | ||||
VCSServer doesn't yet support gevent. | ||||
r1 | ||||
.. _Gunicorn: http://gunicorn.org/ | ||||