IBM nmon FAQ

http://www.ibm.com/developerworks/wikis/display/WikiPtype/nmon+FAQ

Summary of the questions:

• Question 1: Which nmon for my version of AIX or Linux?
• Question 2: nmon crash shortly after starting a data capture please send me the next version?
• Question 3: I have a problem with nmon running on AIX 4.0.3 (or any really old AIX versions)?
• Question 4: All I get is "nmon not found"?
• Question 5: Can you add the monitoring tape drive on AIX?
• Question 6: Can I get the adapters stats from other tools?
• Question 7: When I start nmon 9 on a system that it use to run fine I know get an error message?
• Question 8: What is the most reported error for nmon?
• Question 9: Can you add the monitoring of process priority?
• Question 10: on AIX, nmon 9 does not run, please fix?
• Question 11: Can I decide the filename it saves data too?
• Question 12: What is the default output filename?
• Question 13: I want nmon output piped into a further command, how?
• Question 14: Why do you support all these old unsupported AIX versions?
• Question 15: What if I want support?
• Question 16: Why don't you add a Java front end to nmon and get graphical output?
• Question 17: The command line options don't seem to work right for file capture?
• Question 18: What is paging to a filesystem?
• Question 19: Where can I get nmon and further information?
• Question 20: nmon crashes after about 200 snapshots on AIX?
• Question 21: TOP process stats get switched on when I request Asynchronous I/O stats?
• Question 23: nmon2rrd fails, please fix it?
• Question 24: NANQ and INF?
• Question 25: nmon and AIX commands do not agree?
• Question 26: nmon reports more than 100% for a process - clearly it is wrong?
• Question 27: On AIX the disk adapter are wrong?
• Question 28: on AIX the adapter busy goes over 100%. That is impossible surely?
• Question 29: What about nmon for HP/UX, Solaris on Sparc or x86 or Linux on Itanium?
• Question 30: What about nmon for Windows?
• Question 31: Seeing double the number of CPUs?
• Question 32: 0509-036 Cannot load program /usr/lib/drivers/nfs_kdes.ext ?
• Question 33: Hello, I am new to UNIX and want to tune AIX, what do you recommend?
• Question 34: CPU wait is too high, how can I reduce it?
• Question 35: On AIX, free memory is near zero, how do I free more memory?
• Question 36: How can I set numperm better?
• Question 37: What format is the nmon output file?
• Question 38: I have collected once a second for 8 hours but I can't get the Analyser to work?
• Question 39: nmon does not work on my Linux machine!!
• Question 40: When do we get nmon 10 for Linux?
• Question 41: The boxes and lines in nmon do not work right online with: DTterm, xterm, rvxt, putty, VNC, (whatever you have)?
• Question 42: I have 2400 disk (small SAN LUNs) and nmon is slow to collect the stats from so many, can you help?
• Question 43: Adapter stats and IOADAPT is not saved to the nmon file seems to be missing with AIX 5.1?
• Question 44: What is CharIO (a column of the TOP processes stats)?
• Question 45: On Linux the disk stats are all doubled?
• Question 46: On AIX the disk seem to be mostly on the first adapter?
• Question 47: On nmon for Linux the CPU Wait for IO number is zero or odd?
• Question 48: On nmon for Linux the paging details are missing and the PAGE lines for the capture to file are missing.
• Question 49: I want to collect data every second and then see weekly and monthly reports. How?
• Question 50: nmon will not start on AIX 5.1 due to a libperfstat error?
• Question 51: How do I work out the Physical CPU use on Linux on POWER for shared processor LPARs?
• Question 52: The Disk Busy stats are missing on AIX
• Question 53: Sort order problems with massive nmon output files.
• Question 54: AIX 5.3 updated but then nmon gives "Illegal instruction(coredump)"
• Question 54: AIX 5.3 updated but then nmon gives "Assert Failure"
• Question 55: On AIX 5.3 ML6, nmon output files contain zeros, missing CPU stats, corrupt ZZZ lines and "nfs" strings found in the stats
• Question 56: Does nmon capture point in time stats or averages?
• Question 57: Why is the Process memory percentage zero? (same for System and User percent)

• Question 100: When will nmon collect data from lots of machines or LPARs?
• Question 101: When will nmon collect data like "topas -C"?