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Home/ Questions/Q 6250409
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Editorial Team
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Editorial Team
Asked: May 24, 20262026-05-24T13:25:05+00:00 2026-05-24T13:25:05+00:00

As part of my learning process, I thought it would be good if I

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As part of my learning process, I thought it would be good if I expand a little more knowledge on what I know about apache. I have several questions, and while I know some of the stuff may require a rather lengthy explanation, I hope you can provide an overview so I know where to go looking. (preferably reference to mod_wsgi)I have read some resources after searching on google, and what I know arrive from there, so please bear with me.

  1. What does the apache lifecyle looks like before, during, and after it receives a http request? Does it spawns a new child process to do the work, or creates a thread in one of the child process?

  2. Does apache by default runs under www-data? So if that’s the case, if I want a directory under my project folder to be used for logs, I can change just the folder group to www-data and allows write access?

  3. What user will the python interpreter run under, after being invoked by apache? And what will processes created by Popen or multiprocessing from there run under?

  4. I ran ps U www-data. Why are there so many processes with

S 0:00 /usr/sbin/apache2 -k start

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  1. Editorial Team
    Editorial Team
    2026-05-24T13:25:05+00:00Added an answer on May 24, 2026 at 1:25 pm

    Read:

    http://www.fmc-modeling.org/category/projects/apache/amp/Apache_Modeling_Project.html
    http://code.google.com/p/modwsgi/wiki/ProcessesAndThreading
    http://code.google.com/p/modwsgi/wiki/QuickConfigurationGuide#Delegation_To_Daemon_Process
    http://code.google.com/p/modwsgi/wiki/ConfigurationDirectives#WSGIDaemonProcess

    The first one will tell you all the gory details of how Apache works internally. The latter relate to mod_wsgi specifically and process/threading model.

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