Re: 11g RedHat 5 and Hugepages? anybody successful ?
Date: Mon, 11 Oct 2010 16:06:12 -0500
If you have HugePages properly configured, then these parameters aren't required.
From note 361468.1:
On Linux and some other platforms the Oracle Database initialization
> parameters PRE_PAGE_SGA and LOCK_SGA3 can be set to TRUE to pin the SGA
> pages into memory. HugePages already makes the SGA pages non-swappable, so
> those parameters are not needed to have SGA pages unswappable. But those
> parameters still can provide additional performance advantages for the
> internal mechanism of Oracle Database memory management.
I'd like to see the output of these 4 commands:
grep Huge /proc/meminfo
grep huge /etc/sysctl.conf
grep memlock /etc/security/limits.conf
On Mon, Oct 11, 2010 at 3:53 PM, Crisler, Jon <Jon.Crisler_at_usi.com> wrote:
> Jared- both lock_sga and pre_page_sga are set to FALSE.
> *From:* Jared Still [mailto:jkstill_at_gmail.com]
> *Sent:* Monday, October 11, 2010 3:54 PM
> *To:* Crisler, Jon
> *Subject:* Re: 11g RedHat 5 and Hugepages? anybody successful ?
> Do you have the LOCK_SGA and PRE_PAGE_SGA parameters set?
> On Mon, Oct 11, 2010 at 10:59 AM, Crisler, Jon <Jon.Crisler_at_usi.com>
> I have been trying to get hugepages working on 11gR1 without success.
> Has anybody been able to get this to work properly? In order to use
> hugepages, you have to turn off 11g ASMM which uses the /dev/shm memory
> Hugepages are configured properly in OS, /etc/security/limits.conf
> updated for hugepages. If I attempt to set memory_target and
> memory_max_target to zero (or reset them) then I get ORA-00849
> SGA_TARGET ### cannot be set to more than MEMORY_MAX_TARGET. I am
> following technote 749851.1, and even opened a support case with Oracle,
> and I am not getting anywhere.
> Any clues as to what I am missing? Thanks- Jon
-- Don Seiler http://seilerwerks.wordpress.com ultimate: http://www.mufc.us -- http://www.freelists.org/webpage/oracle-lReceived on Mon Oct 11 2010 - 16:06:12 CDT