Re: howto see shmem

Robert Love (rml@tech9.net)
24 Oct 2001 19:37:26 -0400


On Wed, 2001-10-24 at 19:27, Martín Marqués wrote:
> [...]
> ------ Shared Memory Segments --------
> key shmid owner perms bytes nattch status
> 0x00000000 65536 nobody 600 46084 11 dest
> [...]
> I can see 46084 bytes in shared memory used by the apache.
> Am I wrong?

Nope. Applications know how much the are sharing because they can
easily see what region of memory is shared/mapped into their's.

The reason the kernel can't figure out the net shared memory is because
there is no simple way -- it has to add up the shared regions of all
applications, counting each shared segment only once. Too much work.

Robert Love

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