Re: instance not able to allocate LargePages

If by service you mean SystemD, then all shell limits must be specified in the SystemD service unit file. SystemD ignores /etc/security/limits.conf and /etc/security/limits.d/*

This is what I have in SystemD unit file that starts Oracle single instance database (your issue should be about LimitMEMLOCK):

[Service]
# Limits need to be here since /etc/security/limits.d/* is not applied by SystemD
LimitNPROC=131072
LimitNOFILE=131072
LimitMEMLOCK=infinity

On Mon, 28 Aug 2023 at 11:20, Laurentiu Oprea <laurentiu.oprea06_at_gmail.com> wrote:

> Dear all,
>
> I have a strange situation where if a instance is started by a script
> called via a service after OS boot is failing to allocate the HugePages:
>
> PAGESIZE AVAILABLE_PAGES EXPECTED_PAGES ALLOCATED_PAGES ERROR(s)
>
> 2048K 1942 1818 0 ORA-27125
>
> Reason for not supporting certain system pagesizes:
>
> 4K - Large pagesizes only
>
>
> looks like by whatever reason don't have permissions.
>
>
> After that if I`m connecting to the server and manually trying to start
> the instance all is working fine.
>
>
> Anyone have any idea if the linux service requires something special to be
> able to access the hugepages?
>
>
> Appreciate your help.
>

-- 
Ilmar Kerm

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