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availrmem on Solaris8 - Sun Solaris

star night <star_nightmy-deja.com> wrote: > might be a dumb question.... > can someone pls tell me > why isn't availrmem equal to the total ram installed on server? > is availrmem = total ram - ram used by kernel ? I beleive it starts out that way, but it is not fixed and can change while the system is running. What are you doing that you want that value? There might be a better way to do it. -- Darren Dunham [email]ddunhamtaos.com[/email] Unix System Administrator Taos - The SysAdmin Company Got some Dr Pepper? San Francisco, CA bay area < ...

  1. #1

    Default Re: availrmem on Solaris8

    star night <star_nightmy-deja.com> wrote:
    > might be a dumb question....
    > can someone pls tell me
    > why isn't availrmem equal to the total ram installed on server?
    > is availrmem = total ram - ram used by kernel ?
    I beleive it starts out that way, but it is not fixed and can change
    while the system is running.

    What are you doing that you want that value? There might be a better
    way to do it.

    --
    Darren Dunham [email]ddunhamtaos.com[/email]
    Unix System Administrator Taos - The SysAdmin Company
    Got some Dr Pepper? San Francisco, CA bay area
    < This line left intentionally blank to confuse you. >
    Darren Dunham Guest

  2. #2

    Default Re: availrmem on Solaris8

    I am trying to understand an article on Sun web site which says

    1. "availrmem is the amount of resident and unswappable memory in the
    system"

    and

    2 "The amount of swap space that can be reserved from memory is
    availrmem - swapfs_minfree"

    My question is why does the article say " resident unswappable
    memory". My understanding is that given that "availrmem" is sort the
    amount of memory available for processes, any page can be swapped out
    when there is a need.

    Then how come it is unswappable?

    I think I kind of understand the 2nd def, i.e you only have

    availrmem(again, the total of(RAM) which is avaliable for all the user
    processes)

    -

    swapfs_minfree(an amount of memory(RAM) which is considered to be
    always required for kernel usage)

    amount of memory from RAM for swap reservation


    Again, I am trying to interpret from my understanding and I could be
    totally off.


    Thanks for your time.
    SN
    star night Guest

  3. #3

    Default Re: availrmem on Solaris8

    star night <star_nightmy-deja.com> wrote:
    > I am trying to understand an article on Sun web site which says
    > 1. "availrmem is the amount of resident and unswappable memory in the
    > system"
    > and
    > 2 "The amount of swap space that can be reserved from memory is
    > availrmem - swapfs_minfree"
    > My question is why does the article say " resident unswappable
    > memory". My understanding is that given that "availrmem" is sort the
    > amount of memory available for processes, any page can be swapped out
    > when there is a need.
    > Then how come it is unswappable?
    That confused me too. I am assuming that it is either a typo, or was
    meant differently (so that "unswappable" means "can be removed from
    VM/swap" rather than "cannot be swapped out"). I don't see how the
    standard usage of "cannot be swapped out" would work here.

    --
    Darren Dunham [email]ddunhamtaos.com[/email]
    Unix System Administrator Taos - The SysAdmin Company
    Got some Dr Pepper? San Francisco, CA bay area
    < This line left intentionally blank to confuse you. >
    Darren Dunham Guest

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