This article is still under construction........
Let's have a look at different points:
- Apache with PHP module consumes a lot of memory because each request is handled by one process.
- The worker MPM uses a thread based architecture as opposed to the pre-fork MPM which uses a process based architecture; the architectural differences between the two Multi-Processing Modules means that the worker MPM has a lower memory footprint.
- The pool of fcgid-invoked programs is shared between all httpd workers.
Related links.
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