RE: Prevent ASM from using any hugepages

  • From: "CRISLER, JON A" <JC1706@xxxxxxx>
  • To: "odenysenko@xxxxxxxxx" <odenysenko@xxxxxxxxx>, "Christopher.Taylor2@xxxxxxxxxxxx" <Christopher.Taylor2@xxxxxxxxxxxx>
  • Date: Fri, 17 May 2013 19:16:55 +0000

Starting in 11.2.0.2 you can set a parameter to regulate hugepages usage, 
including to ONLY use hugepages.  I.E. if hugepages is not available, do not 
start up instance.
USE_LARGE_PAGES To Enable HugePages In 11.2 [ID 1392497.1]

-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Oleksandr Denysenko
Sent: Friday, May 17, 2013 3:09 PM
To: Christopher.Taylor2@xxxxxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx; ora_kclosson@xxxxxxxxx
Subject: RE: Prevent ASM from using any hugepages

Taylor,
ASM uses memory anyway so why not give hugepages to it ?
I see at least one benefit - if there will be paging on the system
your ASM's SGA will not be paged out.

Oleksandr Denysenko
17.05.2013 21:56 ÐÏÌØÚÏ×ÁÔÅÌØ <Christopher.Taylor2@xxxxxxxxxxxx> ÎÁÐÉÓÁÌ:

> The reason for this question was nitpicky - ASM is using about 14
> hugepages when it starts up which isn't much.  Just kind of annoyed me -
> probably due to lack of sleep lol
>
> Chris
>
> -----Original Message-----
> From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]
> On Behalf Of Christopher.Taylor2@xxxxxxxxxxxx
> Sent: Friday, May 17, 2013 11:29 AM
> To: oracle-l@xxxxxxxxxxxxx
> Subject: Prevent ASM from using any hugepages
>
> Guys/Gals,
> I'm in the process of configuring hugepages in 10.2.0.4 RAC.
>
> Since ASM starts up first, how I do prevent it from using any of the
> hugepages?
>
> Regards!
>
> Chris Taylor
> Oracle DBA
> Parallon IT&S
>
>
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