Re: Disk buffer / memory utilization

From: R. Payette (premi_at_altern.org)
Date: 10/30/04

  • Next message: R. Payette: "Re: Disk buffer / memory utilization" 
    Date: Sat, 30 Oct 2004 11:18:24 -0400
To: Eric Anderson <anderson@centtech.com>

    I've read and tried the tuning man page ( i've gained 2-3 M on the
    wired ).

    This is typical top output during a build process. It's running awfully
    slow because the system spend most of it's time swapping, while there
    still is that 14M Buf.

    CPU states: 4.7% user, 0.0% nice, 13.6% system, 1.9% interrupt,
    79.8% idle
    Mem: 29M Active, 5696K Inact, 20M Wired, 3208K Cache, 14M Buf, 404K Free
    Swap: 128M Total, 68M Used, 59M Free, 53% Inuse, 4184K In, 2448K Out

       PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU
    COMMAND
    10282 root -20 0 74700K 27336K swread 0:21 21.42% 20.41%
    cc1plus
       193 root 96 0 4284K 1536K select 108:52 0.98% 0.98% ppp

    What happened with 16-32M ram unix servers ? what's so big in modern
    unix that make it unusable on low-end hardware ? How do you build
    kernels that fit on a floppy ( mine is 3.3 M and I thought I removed
    everything that could be removed from the kernel config file )

    freebsd 5.3rc1
    p2 350
    de ethernet card ( generic dec 21041 card )
    ide 4.3G hd
    64M ram
    kernel config : http://massonerie.kicks-ass.org/kc

    Sorry if it's kind of a newbie question. I feel that I'm overlooking
    something big not just finetuning

    thanks for any help

    >
    > I would strongly suggest reading the 'tuning' man page - it's really
    > pretty good, and should answer some of your questions (maybe not
    > specifically, but indirectly about tuning some sysctl's and such).
    >
    > Which such a small amount of memory, you're going to have to work
    > harder at getting it just right.
    >
    > You should also mention what you are trying to make perform well on
    > this system, what version of FreeBSD, and maybe also the hardware
    > information.
    >
    > Eric
    >
    >
    >
    > --
    > ------------------------------------------------------------------
    > Eric Anderson Sr. Systems Administrator Centaur Technology
    > Talk sense to a fool and he calls you foolish.
    > ------------------------------------------------------------------
    >

    _______________________________________________
    freebsd-performance@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-performance
    To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"

  • Next message: R. Payette: "Re: Disk buffer / memory utilization"