Re: Kernel cached memory

From: Bill Davidsen (davidsen_at_tmr.com)
Date: 07/25/05

  • Next message: Steven Rostedt: "Re: xor as a lazy comparison" 
    Date:	Mon, 25 Jul 2005 14:02:19 -0400
To: Paolo Ornati <ornati@fastwebnet.it>

    Paolo Ornati wrote:

    >On Mon, 25 Jul 2005 12:47:50 -0400
    >Bill Davidsen <davidsen@tmr.com> wrote:
    >
    >
    >
    >>And IMHO Linux is *way* too willing to evicy clean pages of my
    >>programs to use as disk buffer, so that when system memory is full I
    >>pay the overhead of TWO disk i/o's, one to finally write the data to
    >>the disk and one to read my program back in. If free software is
    >>about choice, I wish there was more in the area of how memory is
    >>used.
    >>
    >>
    >
    >isn't this tuned enough by "/proc/sys/vm/swappiness" ?
    >
    >
    >
    Let me generate some data points for discussion. But the general answer
    is no, I just want to try to have some numbers to discuss. I also want
    to go back to some 2.4.xx-aa kernels, Andrea had some very nice things
    in his bdflush code, and he was kind enough to explain to me how to tune
    them so I avoided the worst case events. 

    -- 
bill davidsen <davidsen@tmr.com>
  CTO TMR Associates, Inc
  Doing interesting things with small computers since 1979
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