Re: Linux OOM-Killer

basti wrote:
>>> Since a few days we had problems with the Linux OOM-Killer.
>>> Some simple query that normally take around 6-7 minutes now takes 5 hours.
>>> We did not change any configuration values the last days.
>>>
>>> First of all I have set
>>>
>>> vm.overcommit_memory=2
>>> vm.overcommit_ratio=80

> Swap is disabled.
> free -m
>              total       used       free     shared    buffers     cached
> Mem:         32215      16163      16051          0         40      14842
> -/+ buffers/cache:       1281      30934
> Swap:            0          0          0

That together means that you cannot use more than 80% of your
RAM.  Are you hitting that limit?

See the description of overcommit_ratio in
https://www.kernel.org/doc/Documentation/sysctl/vm.txt

I would definitely add some swap.

Yours,
Laurenz Albe