|worker MPM||prefork MPM|
How it works
Uses multiple child processes. It's multi-threaded within each child, and each thread handles a single connection.
Uses multiple child processes, each child handles one connection at a time.
fast and highly scalable
speed is comparable to that of worker
Memory footprint is comparatively low
Memory usage is high, and more traffic leads to greater memory usage
less tolerant of faulty modules, and a faulty thread can affect all the threads in a child process.
highly tolerant of faulty modules and crashing children
single or double CPU systems
Thursday, November 15, 2007
Apache - Multi-Processing Modules (MPMs)
MPMs are Responsible for binding to network ports on the machine, accepting requests, and dispatching children to handle the requests. For Linux, two types: worker (threaded MPM) and prefork (non-threaded MPM)