hj all,
i executed the vmstat commandline,

i get:
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 31188 35236 53136 906604 0 0 146 48 1015 881 1 2 95 2 0


so can anyone for me know how calculate RAM free( output Megabyte)?

You can use the "free" command, like so:
Read the man page about it to learn more.

Cheers,

Josh

Hi, I notice this was posted in the AIX forum. The free command unfortunately doesn't come installed on AIX.

Install/use nmon and press 'm' for memory, output on the left hand side will look like the below example,

Physical
│% Used 86.1%
│% Free 13.9%
│MB Used 7057.4MB
│MB Free 1134.6MB
│Total(MB) 8192.0MB

On the right hand side you will see something like below,

| FileSystemCache
| (numperm) 42.8%
| Process 20.7%
| System 22.7%
| Free 13.9%
| Total 100.0%

So in this example, there is 8192MB RAM assigned to the lpar and 7057MB is used. Of the 7057MB used, 42.8% (numperm%) of that is actually filesystem cache (buffer) so a large portion of this technically can also be used if a process needs it.

The topas command will also give this output as well as commands like vmstat -v and svmon -G.

Hope that helps.

G

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