How to optimize a RAM-only (swapless) system?

AJ ONeal coolaj86 at gmail.com
Wed Dec 22 09:05:11 MST 2010


Are there any other ideas for what I might do with sysctl, the kernel
config, or things I can change it /etc?

AJ ONeal


On Tue, Dec 21, 2010 at 10:35 AM, AJ ONeal <coolaj86 at gmail.com> wrote:

> The bugs I've already been bitten by is that if you have no swap the kernel
> will default to sending the oom (out-of-memory) killer on any random process
> and kill it in a fashion that to the casual observer appears to be a
> segfault (a segfault that nor gdb nor the powers of above will tell you
> isn't a segfault at all - only the kernel log).
>
> /etc/sysctl.conf must be configured like so for a system with no swap:
> vm.overcommit_memory = 2
> vm.overcommit_ratio = 100
>
>
> I also found that /dev/shm has a memory leak in a few different versions
> of the kernel that are particularly profound if continuously writing and
> unlinking files there.
>
> I'm looking for a list of other settings sysctl and otherwise - that will
> prevent me from banging my head against the wall.
>
> AJ ONeal
>


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