I've considered it, but I have a few other processes that I'd like to swap out when they're inactive to increase disk cache etc. btw, I've managed to lock mysql into memory on the server using the memlock config option which uses mlockall. I've googled myself to death but can't find anything about mlock and apache.
altavista gave me this
http://www.itworld.com/nl/lnx_tip/05182001/
I have not tried it but one trick would be to create a process that locks memeory then execs apache into the alloced memory space. Somehow I hope/doubt this would not work but i may be worth a try as a "workaround" :-)
A quick grep of the most recent (cvs update as of 29/feb 12:43) apache2/mp2 source shows no ocurrences of 'mlock'.
Note that it should not be too difficult to add however it would make more sense to upgrade apache to a RT process if this is your objective.
Another option would be to install an SSD as swap device. This does make linux (and Cray's) go like greased weasel stuff and as memory costs are low, should not be an expensive option.
Whatever you decide to do , keep us informed- I for one am interested in how you solve the problem as I would with large AP2/MP2 apps and swap can be a problem for me as well.
Jacqui
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