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How to change Parameters like SHMMAX in AIX

Posted on 2009-07-14
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How to change kernel Parameters like SHMMAX in AIX, i want to change it dynamically and manually and also i want to know how to change in smitty?
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Question by:umesh4exp
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by:woolmilkporc
woolmilkporc earned 500 total points
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Hi,
shmmax (max. size of a shared memory segment) is not settable on AIX.
Fixed values are 256 MB for 32-bit systems and 2 GB for 64-bit systems.
smitty can set some values. Use 'smitty chgsys' to view.
wmp
 
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woolmilkporc earned 500 total points
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More kernel and network parameters can be displayed/set using the commands vmo, ioo, lvmo, schedo, no, nfso, raso.

vmo - Manages Virtual Memory Manager tunable parameters.
ioo - Manages Input/Output tunable parameters.
lvmo - Manages lvm pbuf tunable parameters.
schedo - Manages CPU scheduler tunable parameters.
no - Manages network tuning parameters.
nfso - Manages Network File System (NFS) tuning parameters.
raso - Manages RAS options.
You can get help for each of the commands using [cmd] -h , you can list (almost) all settings using [cmd] -a , and you can get a brief description of every tunable parameter using [cmd] -h [tunable].
When making changes, you can have them take effect now (where applicable), at next reboot, or both.
Most of the above is also accessible via smitty - use
smitty tuning
Selecting the desired tuning area, selecting 'Change/Show...', positioning the cursor at the desired value and pressing <F1> gives help information.
wmp
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