non root user for AIX performance tuning

[aixbuff]

HI
Can any one give me the steps for creating an non root user
for AIX performance tuning?
TX in Advance.

 

[DSMARWAY]

hi,

what do you want the non-root user to tune ?
or do you just want the non-root user to have the capability of running system performance commands ?

 

[aixbuff]

the non user should be able to use the vmtune command for tuning performance related variables.

AIXBUFF

 

[DSMARWAY]

The vmtune command can only be executed by root

see following

http://usgibm.nersc.gov/doc_link/en_US/a_doc_lib/aixbman/prftungd/vmtune.htm

 

[Guest_imported]

HI Thanks

But what if my boss wants a performance specialist to be given exclusive ID for performance tuning of course non root user account.

If I make a user member of system group will it work or I need to change file permission ....

please reply

 

[DSMARWAY]

you can try it BUT , vmtune may require access to other system files, and libraries on the operating system and you will update certain kernel parameters which require a reboot to take affect .

As you are probably ware , performance tuning is a big area and can be a fine art , but to get there in the first place you must analyse your system and see where the bottlenecks are before you start tuning your system , because you can make it worse .

What i would say to your boss , is that we must monitor the system on a regular basis ( you can run sar , vmstat , iostat , lsps , other monitoring tools from cron which writes the data to a file(s) , you can then maniplulate the data to see where the bottlenecks if any ,are . From this you can tune your system , hopefully will only need to do it once . There are other tools like perfstat ( need to have filesets , perfagent.tools , bos.perf.diag_tool bos.perf.perfstat installed)
which produces a report on basic performance problems on your system , have a look at thread52-297333

 

[aixat]

Hello,
You can make the user part of system group and performance specialist will be able to tune the system.

 

[aixbuff]

aixat
Can you give reasons for you logic of making the user into system group.Have you ever tried this out...

I also thought on the same lines but to confirm threw the question to AIX experts on the forum.If any body has tried this out please confirm so that I can do it on my production server...

AIXBUFF

 

[aixat]

Hello Aixbuff,

How much money your company is paying the performance specialist.

GOOD and HONEST performance specialist is not going to mess up someone's system. He is going to make only few changes. If he mess up things he will have to fix it.

To test things out. One needs a good test system. Excellent company do keep a test system to test this out before doing this on production system.

As a Ex support person i use to get this question all the time. People were always scare to make changes to production system and if something goes wrong they can blame someone else even if that person is responsible or not.

Even if the change is right and one make change and something else goes wrong that has nothing to do with the change made.

There is no gureentee in life.

If you want to tune the system your self go to

http://www.redbooks.ibm.com

then find book on AIX performance.

 

[ElgisRamon]

I think the best bet here is to use sudo to enable a root command -vmtune in this case- for the user.
I hope it works...
Unix was made by and for smart people.

 

[Guest_imported]

Hi Guys,

I am getting complex answer to my straight questions.

My Q is simple and I apreciate if one can give me straight answer.

aixbuff