Re: Hugepages usage

How large is you SGA? Also, what setting for USE_LARGE_PAGES parameter?

Set USE_LARGE_PAGES to only and see if the database will start. You may not have enough huge pages (24 GB).

Keith

> On Feb 10, 2020, at 5:20 PM, Ram K <lambu999_at_gmail.com> wrote:
>
>
> Thanks Andrew. What is 'Anonymous Hugepages'. Is it the same as Transparent Huge Pages that Oracle recommends to disable <https://docs.oracle.com/en/database/oracle/oracle-database/19/unxar/administering-oracle-database-on-linux.html#GUID-02E9147D-D565-4AF8-B12A-8E6E9F74BEEA>?
>
>
> On Mon, Feb 10, 2020 at 5:05 PM Andrew Kerber <andrew.kerber_at_gmail.com <mailto:andrew.kerber_at_gmail.com>> wrote:
> You are correct, if the DB is up and running and all the huge pages are free as shown here, they are not being used. Anonymous hugepages should be disabled for all oracle servers.
>
> Sent from my iPad
>
> > On Feb 10, 2020, at 17:03, Ram K <lambu999_at_gmail.com <mailto:lambu999_at_gmail.com>> wrote:
> >
> > 
> >
> > Hi,
> >
> > I came across this setting in a Linux server running oracle 12.
> >
> > grep Huge /proc/meminfo
> > AnonHugePages: 43008 kB
> > HugePages_Total: 12288
> > HugePages_Free: 12288
> > HugePages_Rsvd: 0
> > HugePages_Surp: 0
> > Hugepagesize: 2048 kB
> >
> > Does this mean that hugepages are not being used since all the Hugepages are free?
> > How can I find out if hugepages were ever used, to make sure I am not looking at an isolated time period when it is not being used.
> >
> > --
> > Thanks,
> > Ram.
>
>
> --
> Thanks,
> Ram.

--
http://www.freelists.org/webpage/oracle-l