Aleksandar Ivanisevic wrote:
Thanks. I was considering whether to put PAE or nonPAE kernel on a 4gb machine. I got bitten in RHEL4 where oom killer on non-bigmem kernels was killing front and center although there was plenty of free memory. I don't know if it was because of the split or there was a oom killer bug, but it got fixed once i've put a bigmem kernel on.
I don't know if this is/was your problem, but the oom killer stepping in when you seem to have loads of free memory is actually because the system is short on low memory (memory that the kernel can address directly as opposed to highmem which it can't). My preferred cure for that is to use a 64 bit kernel; 32 bits are so passé :-)
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