Re: Estimating HugePages Requirements?

On 9/6/21, 11:24 PM, "Kyotaro Horiguchi" <horikyota.ntt@gmail.com> wrote:
> At Fri, 3 Sep 2021 17:46:05 +0000, "Bossart, Nathan" <bossartn@amazon.com> wrote in
>> On 9/2/21, 10:12 PM, "Kyotaro Horiguchi" <horikyota.ntt@gmail.com> wrote:
>> > I noticed that postgres -C shared_memory_size showed 137 (= 144703488)
>> > whereas the error message above showed 148897792 bytes (142MB). So it
>> > seems that something is forgotten while calculating
>> > shared_memory_size.  As the consequence, launching postgres setting
>> > huge_pages_required (69 pages) as vm.nr_hugepages ended up in the
>> > "could not map anonymous shared memory" error.
>>
>> Hm.  I'm not seeing this with the v5 patch set, so maybe I
>> inadvertently fixed it already.  Can you check this again with v5?
>
> Thanks! I confirmed that the numbers match with v5.

Thanks for confirming.

Nathan