[bvijaycom]

Dear All,

How to find out the memory usage in AIX 5.3.

I want to know which process is occupying how much memory. What is the command to achieve that?

bash-3.00# vmstat 5

System configuration: lcpu=2 mem=6144MB ent=1.00

kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------------------
r b avm fre re pi po fr sr cy in sy cs us sy id wa pc ec
4 0 1210606 323652 0 0 0 0 0 0 11 486 469 1 0 99 0 0.01 1.3
3 1 1210604 323654 0 0 0 0 0 0 25 392 468 0 1 98 1 0.01 1.4
2 0 1210604 323654 0 0 0 0 0 0 7 380 454 0 0 99 0 0.01 1.0
3 0 1210604 323654 0 0 0 0 0 0 10 372 436 0 0 99 0 0.01 1.0

From the above output how can we calculate free memory.

As per my understanding 323652 means 323 MB is the free memory right .Please correct me if I am wrong.

[derek]

I'm not near an AIX box but have a look at the 'svmon' command

especially with the -P flag, pipe it to more and search for your process id#.

[john.samons]

Look at the NMON toolset, I think it will provide you with quite a lot of overall info to your system....

nmon analyser -- A free tool to produce AIX performance reports
nmon performance: A free tool to analyze AIX and Linux performance

[bvijaycom]

HI All,

Thanks for your reply.

Is there any command to see the top 10 process memory usage wise.

[john.samons]

afaik, when using nmon, you can look at the top processes, and there is 6 different views.... i think one might give you that type of info....

else you'd have to work through the svmon command....

[adeel123]

did u try topas command

[bvijaycom]

hi,

I have tried topas command.But i dont know how to dfind out what are the process are occufying memory in percentage basis.

Example.

If i want to know which processes are taking memory in that servers

process 1 - 1.8 GB memory using
Process 2 - 2 GB memory using
Process 3 - 780 MB memory using

How do we find out this..

Please help me on this ...

[john.samons]

afaik, there isn't such a command. If nmon's user friendly output doesn't help, you'll have to look into svmon. Read the man page, it will enlighten you....

Some svmon commands:

Lists top usage of memory segments:


# svmon -Sau


Memory stats for the top 10 processes:

# svmon -Pau 10

[niella]

Hi John... imagine seeing a work colleague here!

The top ten memory consumers command you guys might want is:
svmon -Pt15 | perl -e 'while(<>){print if($.==2||$&&&!$s++);$.=0 if(/^-+$/)}'

[john.samons]

Hi Niel, good to see you here!

Thanks for the cool perl code!