Messages in this thread |  | | Date | Sun, 16 Feb 1997 02:22:57 -0500 (EST) | From | Gerry S Hayes <> | Subject | Re: I need help with RAM (I suspect a problem but ...) |
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"W. Reilly Cooley" <wcooley@navi.net> writes: > I have found that with 32MB of memory running up to "make -j 30" or so > (maybe higher, I gave up because I found little difference in the time > for a kernel make with that than without it, and often it seemed to > take several seconds _longer_ with more concurrent jobs, but I have > only one CPU) I had no swapping (but I had nothing else running on the > machine)
More than the "-j #" option is important here. RAM use will vary radically depending on what parts of the kernel you are compiling. -j 30 is excessive on a single processor machine, though; I find -j8 to be optimal on a PPro 180 with 64MB RAM. -j16 hits swap on this machine with my standard kernel options. -j12 fails to hit swap but is slower than -j8. I don't think that anyone else can get anything useful from this except that they need to try timing things themselves; -jX, where X is 4 times the number of processors in the machine, is a good place to start for machines with 16MB+ of RAM.
Cordially,
Sumner
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