Re: (shared) memory and preloading modules using Mod-perl

Are you running with a threaded MPM? That uses a lot more memory. If you run with prefork MPM, the modules you load before forking will be shared by copy-on-write. This is all documented here.

Comment on Re: (shared) memory and preloading modules using Mod-perl

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Re^2: (shared) memory and preloading modules using Mod-perl by jbrugger (Parson) on Dec 29, 2004 at 18:46 UTC
Thanks. I did not know that, but i'm using the prefork MPM on one machine and threaded MPM on the other. I thought it would make no difference to mod_perl, but i'll try it out.	[reply]
Re^3: (shared) memory and preloading modules using Mod-perl by perrin (Chancellor) on Dec 29, 2004 at 19:13 UTC
Threading wastes a lot of memory because perl threads are unable to share their opcode tree as effectively as copy-on-write does. If you have an OS that supports prefork, you should stick with prefork.	[reply]