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Thread: bigpages in lilo.conf: big page setup in linux for oracle database

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  1. #1
    According to otn whitepaper:
    http://otn.oracle.com/tech/linux/pdf...h-WP-Final.PDF

    We can setup large pages for linux, to enhance performance for system with larger memory.
    But when i try to implement it, i face difficulty.
    This is my lilo.conf file:

    prompt
    timeout=50
    default=linux
    boot=/dev/sda
    map=/boot/map
    install=/boot/boot.b
    message=/boot/message
    linear
    bigpages=2MB

    image=/boot/vmlinuz-2.4.9-e.3smp
    label=linux
    initrd=/boot/initrd-2.4.9-e.3smp.img
    read-only
    root=/dev/sda2
    append="CONFIG_WATCHDOG_NOWAYOUT=Y"

    image=/boot/vmlinuz-2.4.9-e.3
    label=linux-up
    initrd=/boot/initrd-2.4.9-e.3.img
    read-only
    root=/dev/sda2
    when i type
    #lilo
    it gives out error message:
    [root@rac1 etc]# lilo
    Syntax error near line 9 in file /etc/lilo.conf
    Does someone have experience on this topic?
    www.cnoug.org

  2. #2
    Join Date
    Jun 2000
    Location
    Madrid, Spain
    Posts
    7,447
    just curious, dont you have to recompile kernel or loaded it as a kernel module?

  3. #3
    Originally posted by pando
    just curious, dont you have to recompile kernel or loaded it as a kernel module?
    According to that article, and another whitepaper
    http://otn.oracle.com/tech/linux/pdf...2_accepted.pdf
    We do not need to recompile the kernel.
    Now i tried this:
    [oracle@rac1 dbs]$ cat /etc/lilo.conf
    prompt
    timeout=50
    default=linux
    boot=/dev/sda
    map=/boot/map
    install=/boot/boot.b
    message=/boot/message
    linear
    append="bigpages=2MB"

    image=/boot/vmlinuz-2.4.9-e.3smp
    label=linux
    initrd=/boot/initrd-2.4.9-e.3smp.img
    read-only
    root=/dev/sda2
    append="CONFIG_WATCHDOG_NOWAYOUT=Y"

    image=/boot/vmlinuz-2.4.9-e.3
    label=linux-up
    initrd=/boot/initrd-2.4.9-e.3.img
    read-only
    root=/dev/sda2
    and run lilo, this time linux does not give out error message, but this is not the way oracle said, so i am not sure whether this is right, and not able to verify if bigpages are really enabled.

    Is there someone have this experience? Or have the interest to research it with me?

    www.cnoug.org

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