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    SubjectRe: Where's all my memory going?
    On Thu, Jan 10, 2002 at 03:36:39PM -0700, Andreas Dilger wrote:
    > In any case, you also pointed out the same thing I did, namely that these
    > slab entries (while having some high numbers) do not account for the large
    > amount of used memory in the system. Maybe SysRQ-M output can help a bit?

    Running this on the box after it's settled down a bit, (over the weekend,
    the usage hasn't altered), with all mail delivered and collected so the box
    is currently quiet, produces the following 'free' output:

    root@plum:~# free
    total used free shared buffers cached
    Mem: 1029524 965344 64180 0 45204 22936
    -/+ buffers/cache: 897204 132320
    Swap: 2097136 116 2097020

    And SysRQ+M yields the following:

    SysRq : Show Memory
    Free pages: 66612kB ( 4424kB HighMem)
    Zone:DMA freepages: 4848kB min: 128kB low: 256kB high: 384kB
    Zone:Normal freepages: 57340kB min: 1020kB low: 2040kB high: 3060kB
    Zone:HighMem freepages: 4424kB min: 1020kB low: 2040kB high: 3060kB
    ( Active: 160155, inactive: 58253, free: 16653 )
    124*4kB 98*8kB 41*16kB 13*32kB 3*64kB 0*128kB 1*256kB 0*512kB 0*1024kB 1*2048kB = 4848kB)
    11029*4kB 1097*8kB 140*16kB 7*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB = 57340kB)
    328*4kB 55*8kB 19*16kB 10*32kB 2*64kB 3*128kB 0*256kB 1*512kB 1*1024kB 0*2048kB = 4424kB)
    Swap cache: add 48, delete 24, find 13/14, race 0+0
    Free swap: 2097020kB
    262128 pages of RAM
    32752 pages of HIGHMEM
    4747 reserved pages
    20447 pages shared
    24 pages swap cached
    0 pages in page table cache
    Buffer memory: 44424kB
    CLEAN: 209114 buffers, 836405 kbyte, 188 used (last=209112), 0 locked, 0 dirty
    ^^^^^^ Is this our magic value?
    DIRTY: 8 buffers, 32 kbyte, 0 used (last=0), 0 locked, 8 dirty


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