Thanks for the information, my pod is already requesting 24gb and the host 
it's running on has 32gb available, so I'm running out of space to maneuver 
on these machines. 
I can create a dedicated node group for prometheus alone but I'm trying to 
avoid that if possible since it will make it more of a special creature 
inside our cluster, and I'm usually try to avoid that whenever possible.

On Saturday, July 31, 2021 at 12:24:44 PM UTC+3 [email protected] wrote:

> There is no single correct answer. It depends on your ingestion rate and 
> labels.
>
> Just give the pod more memory so that it does not crash. You do not want 
> to be too tight on memory anyway, as Prometheus needs some non-process 
> memory for page cache in the pod in order to perform queries.
>
> On Fri, Jul 30, 2021 at 9:21 PM 'Yaron Idan' via Prometheus Users <
> [email protected]> wrote:
>
>> I have a prometheus pod running on my cluster requesting 24gb of memory. 
>> It runs great most of the time but when it needs to read a large WAL it 
>> OOMs and the WAL has to be deleted manually. 
>> I've saw multiple messages suggesting that the instance just needs more 
>> memory in order to replay the WAL, but I wanted to get a better grasp of 
>> how the size of WAL relates to the memory the pod needs - if I can find out 
>> said ratio, I can probably alert well in advance if the WAL grows too big 
>> and needs to be handled with before we get in a crashloop.
>>
>> Any idea how can I find out this information?
>>
>> Thanks.
>>
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