DBAsupport.com Forums - Powered by vBulletin
Results 1 to 6 of 6

Thread: How to free up memory?

  1. 07-03-2008, 06:02 AM #1
    reeshe
    reeshe is offline Member
    Join Date
    Oct 2007
    Posts
    114

    How to free up memory?

    Hi Friends,

    DB = Oracle 10g
    Apps=EBS R12
    OS = Linux RHEL 4

    My server physical RAM is 4Gb.
    At fresh reboot the Memory consumption is 80M only.
    When I started DB is goes up to 800Mb memory usage.
    When I started Apps is goes up to 2Gb.
    But when I shutdown DB and Apps I am expecting is will go back to 80M.
    but still the 2Gb is used.
    When I startup DB and Apps again the usage goes up to 4Gb.
    and when I shutdown both again the 4gb is not released.

    How do I resolve this please :(

    What is command in Linux that will list all memory usage per module/apps sorted memory size ?

    Thanks a lot
    Reply With Quote Reply With Quote
  2. 07-03-2008, 06:53 AM #2
    PAVB's Avatar
    PAVB
    PAVB is offline Senior Advisor
    Join Date
    Mar 2007
    Location
    Ft. Lauderdale, FL
    Posts
    3,555
    "...you should never worry about the amount of free memory on Linux. The kernel attempts to keep this slightly above zero by keeping the cache as large as possible. This is a feature not a bug" (*)

    (*) http://sourcefrog.net/weblog/softwar.../free-mem.html
    Pablo (Paul) Berzukov

    Author of Understanding Database Administration available at amazon and other bookstores.

    Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
    Reply With Quote Reply With Quote
  3. 07-03-2008, 10:36 AM #3
    reeshe
    reeshe is offline Member
    Join Date
    Oct 2007
    Posts
    114
    thanks dear, your mean if I have 4GB mem it will used all of it? coz I only see 100M free, maybe If I have 8Gb it will also pre-allocate all?
    Last edited by reeshe; 07-03-2008 at 10:49 AM.
    Reply With Quote Reply With Quote
  4. 07-03-2008, 10:50 AM #4
    PAVB's Avatar
    PAVB
    PAVB is offline Senior Advisor
    Join Date
    Mar 2007
    Location
    Ft. Lauderdale, FL
    Posts
    3,555
    Anticipating your question I provided a hyperlink, would you mind in reading the target document?
    Pablo (Paul) Berzukov

    Author of Understanding Database Administration available at amazon and other bookstores.

    Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.
    Reply With Quote Reply With Quote
  5. 07-04-2008, 12:59 AM #5
    reeshe
    reeshe is offline Member
    Join Date
    Oct 2007
    Posts
    114

    Apps Developer vs DBA

    You are so clever dear
    Can I have the link please? Oh...it is there above, im so blinded


    By the way...
    I have read something... that "A good DBA is a bad Developer and vice-versa
    a good Developer is a bad DBA" What does it mean?

    Thanks a lot
    Last edited by reeshe; 07-04-2008 at 01:02 AM.
    Reply With Quote Reply With Quote
  6. 07-07-2008, 11:34 AM #6
    BV1963
    BV1963 is offline Senior Member
    Join Date
    Nov 2001
    Posts
    335
    If you look into free +- buffers/cache how much free memory do you see? Can you post output of the free command?
    One, who thinks that the other one who thinks that know and does not know, does not know either!
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Click Here to Expand Forum to Full Width