Hi Larry,
You can monitor current usage
of such resources via 'ipcs'
command. The man pages for
'ipcs' explain the meaning of
various columns in the output.
Use 'ipcs -a' to display all
columns.
On the other hand, the default
settings for the parameters:
semmns, semmap, and semmnu are
determined by formulas.
You can see this from the
output of 'kmtune':
semmap (SEMMNI+2)
semmns (SEMMNI*2)
semmnu (SEMMNI/2).
So, unless you have a reason
to change the defaults, you
just need to modify the value
for semmni, and the other
three "semaphore parameters"
will adjust automatically.
If you need to do customized
settings, it would be quite
important, I think, to
understand the meaning of
each resource. Again, the
man pages for 'ipcs' might
be helpful.
For example, the parameter
shmseg sets the maximum number
of shared memory segments per
process. If you run
'ipcs -mopb' you might be able
to determine if the number
of shared memory segments
for any process is even close
to the current shmseg setting.
I also like to use the
attached glance syntax to get
more information. If you want
to try it, save it to your
current directory as shmem.txt
and then run:
glance -adviser_only -syntax shmem.txt -iterations
