rApache User Limit

[Cayce Koehler]

I'm trying to figure out what the limit on the number of simultaneous users for a server running rApache.

Has anyone ran tests on their R code running on rApache to see the limitations?

What is the max number of users / requests rApache can handle at one point?

 I know R is a single action service so I feel like the answer is 1, but that doesn't make sense to what I am thinking. Hopefully this makes sense.

[Jeffrey Horner]

rApache works best when using the prefork MPM:

http://httpd.apache.org/docs/2.4/mod/prefork.html

In that case, the maximum number of concurrent users is limited to how many child processes apache can maintain in memory since each child process handles one user, and in each child process is an instance of R.

Also, I wouldn't recommend any other MPM even though rApache can work with the worker MPM, for sake of completeness.

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http://biostat.mc.vanderbilt.edu/JeffreyHorner