RE: Implementing ADDRESS WINDOWING EXTENSIONS (AWE) for increased memory

From: kathy duret <>
Date: Wed, 6 Feb 2008 13:43:41 -0800 (PST)
Message-ID: <>


  You might have to get your sga target lower as well.   I had issues with hyperthreading and the sga target and had to lower my sga size.    

  Look at your pools - large, java, you might be able to lower those.    

  I didn't have great success with /PAE switch but I was on and it had memory leaks that supposedly were fixed in    

  I used the /3G switch, used orastack and some other tricks to stretch my virtual bytes in Windows.    


"Koivu, Lisa" <> wrote:

        v\:* {behavior:url(#default#VML);}  o\:* {behavior:url(#default#VML);}  w\:* {behavior:url(#default#VML);}  .shape {behavior:url(#default#VML);}                Hi David, 

  If you’ve tried to bring the database up once and received this error, you will need to reboot the host to clear out memory. Set the db service to not start upon reboot so you can control the restart when the host is back.    

  Ensure that your settings are not too large for the amount of memory you have available also. Remember, db_block_buffers is the number of blocks, not the size of the pool. That’s bit me more than once.    

  Good luck.    



  From: [] On Behalf Of David Grosser Sent: Friday, February 01, 2008 4:23 PM
Subject: Implementing ADDRESS WINDOWING EXTENSIONS (AWE) for increased memory    


I'm trying to implement ADDRESS WINDOWING EXTENSIONS (AWE) to take advantage of all of the memory on my server. The server details are: Windows server 2003 enterprise edition, 4 processors, 8 GB memory, Oracle  

I tried to implement awe according to metalink note 225349.1 but my instance is not coming up. I did the following:       

   added switches /PAE and /3GB to the boot.ini       

   removed sga_target from the spfile
added USE_INDIRECT_DATA_BUFFERS=TRUE to the spfile       

   added DB_BLOCK_BUFFERS to the spfile

  The error I get when I start the database is :

ORA-27102: out of memory
OSD-00034: additional error information
O/S-Error: (OS 8) Not enough storage is available to process this command.

I've tried raising and lowering the memory but nothing works.  

Has anyone implemented AWE? If so, how did you get it to work?  

David Grosser
NSTAR Electric and Gas         


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Received on Wed Feb 06 2008 - 15:43:41 CST

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