notroot@somehost:/home/notroot# nmon -v
nmon version TOPAS-NMON build AIX
notroot@somehost:/home/notroot# oslevel -s
6100-06-05-1115
notroot@somehost:/home/notroot# which nmon
/usr/bin/nmon
notroot@somehost:/home/notroot# lslpp -w /usr/bin/nmon
  File                                        Fileset               Type
  ----------------------------------------------------------------------------
  /usr/bin/nmon                               bos.perf.tools        File
notroot@somehost:/home/notroot# nmon -h

Hint: topas_nmon [-h] [-s <seconds>] [-c <count>] [-f -d -t -r <name>] [-x]
 Command: TOPAS_NMON
        -h            FULL help information - much more than here
        Interactive-Mode:
        read startup banner and type: "h" once it is running
        For Data-Collect-Mode (-f)
        -f            spreadsheet output format [note: default -s300 -c288]
        optional
        -s <seconds>  between refreshing the screen [default 2]
        -c <number>   of refreshes [default millions]
        -t            spreadsheet includes top processes
        -x            capacity planning (15 min for 1 day = -fdt -s 900 -c 96)

For Interactive-Mode
        -s <seconds>  between refreshing the screen [default 2]
        -c <number>   of refreshes [default millions]
        -g <filename> User decided Disk Groups
                      - file = on each line: group_name <hdisk_list> space separated
                      - like: rootvg hdisk0 hdisk1 hdisk2
                      - upto 32 groups hdisks can appear more than once
        -b            black and white [default is colour]
        -B            no boxes [default is show boxes]
        example: topas_nmon -s 1 -c 100

For Data-Collect-Mode = spreadsheet format (comma separated values)
        Note: use only one of f,F,z,x or X and make it the first argument
        -f            spreadsheet output format [note: default -s300 -c288]
                         output file is <hostname>_YYYYMMDD_HHMM.nmon
        -F <filename> same as -f but user supplied filename
        -r <runname>  goes into spreadsheet file [default hostname]
        -t            include top processes in the output
        -T            as -t plus saves command line arguments in UARG section
        -Y            like -t but all commands with the same name are added up and reported
                      Note: you can have only one of -t, -T or -Y (last on the cmd line wins)
        -s <seconds>  between snap shots
        -c <number>   of refreshes
        -w <number>   Timestamp size (Tnnnn), values4 to 16, for analyser use 4 or 8
        -l <dpl>      disks/line default 150 to avoid spreadsheet issues. For EMC use 64
        -g <filename> User decided Disk Groups (see above -g)
        -d            Include Disk Service time sections
        -k <disklist> Only report these disks also works online  (Example -k hdisk3,hdisk23,hdisk44)
        -G            Use UTC/GMT standard time (not local time)
        -K            Include RAW Kernel & LPAR sections (RAWLPAR & RAWCPUTOTAL)
        -D            Skip disk configuration sections
        -E            Skip ESS  configuration sections
        -J            Skip JFS sections
        -V            Include disk Volume Group section
        -P            Include Paging Space section
        -M            Include MEMPAGES section = detailed memory stats per page size
        -N            Include NFS section, use -NN for NFSv4 stats.
        -W            Include WLM sections
        -S            Include WLM sections with SubClasses
        -^            Include Fibre Channel (FC) sections
        -O            Include Shared Ethernet Adpater (SEA) VIOS only sections
        -L            Include LARGE page section
        -I <percent>  Ignore process percent threshold (default 0.1)
                      don't save TOP stats if proc using less CPU than this %
        -A            Include Async I/O Section
        -m <dir>      nmon changes to this directory before saving data to a file
        -Z <priority> set nice priority -20=important to 20=unimportant (negative only for root user)
        example: collect for 1 hour at 30 second intervals with top procs
                 topas_nmon -f -t -r Test1 -s30 -c120

        To load into a spreadsheet like Lotus 1-2-3:
        sort -A *nmon >stats.csv
        transfer the stats.csv file to your PC
        Start 1-2-3 and then Open <char-separated-value ASCII file>

Capacity planning mode - use cron to run each day
        -x            sensible spreadsheet output for CP =  one day
                      every 15 mins for 1 day ( i.e. -ft -s 900 -c 96)
        -X            sensible spreadsheet output for CP = busy hour
                      every 30 secs for 1 hour ( i.e. -ft -s 30 -c 120)

Set-up and installation
        To enable disk stats as root: chdev -l sys0 -a iostat=true
        - this adds the disk % busy numbers (otherwise they are zero)
        If you have hundreds of disk this can take 1% to 2% CPU

Interactive Mode Commands
        key --- Toggles to control what is displayed ---
        h   = Online help information
        r   = Resources pSeries type, machine name, cache details and AIX version + LPAR
        p   = Partitions stats
        c   = CPU by processor stats with bar graphs
                 #=toggle PURR based stats (POWER5/6 shared CPUs only)
        C   = CPU by processor stats for high numbers of CPU
        l   = long term CPU (over 75 snapshots) with bar graphs
        m   = Memory and Paging stats
        M   = Multiple Page Size stats in pages - 2nd time in MB's
        k   = Kernel Internal stats
        n   = Network stats
        =   = For Network & Disk Toggle KB/s to MB/s
        O   = Shared Ethernet Adapter VIOS only
        N   = NFS Network File System stats (2nd N gets you NFSv4)
        d   = Disk I/O Graphs (see -k to limit to specific disks)
        D   = Disk I/O Stats - multiple times gets you more stats
        o   = Disk I/O Map (one character per disk showing how busy it is)
        g   = Disk Group I/O Stats (have to use -g commandline option)
        a   = Adapter I/O Stats
        ^   = Fibre Channel Adapter via fcstat command
        [   = Start an On demand nmon recording
        ]   = Stop an On demand nmon recording
        e   = ESS vpath Logical Disk I/O Stats
        V   = Disk Volume Group stats
        P   = Paging Space stats
        j   = JFS Stats
        t   = Top Process Stats  1=Basic-Details 2=Accumulated-CPU
               Performance sorted by 3=CPU 4=Size 5=I/O
        u   = Top but with command arguments shown (used with 3,4 & 5)
               to refresh arguments (for new processes) hit u twice
        U   =  as u plus Workload Classes/WPAR
        W   =  Workload Management (WLM) Stats
        S  =  WLM with SubClasses
        w   = use with top to show AIX wait processes (good for SMP)
        A   = Summarise Async I/O (aioserver) processes
        v   = Verbose this highlights problems on the machine and
              categorises them as either danger, warnings or OK
        b   = black and white mode (or use -b option)
        .   = minimum mode i.e. only busy disks and processes
        ~   = switch to topas screen

        key --- Other Controls ---
        +   = double the screen refresh time
        -   = halves the screen refresh time
        q   = quit (also x)
        0   = reset peak counts to zero (peak = ">")
        space = refresh screen now

Startup Control
        If you find you always type the same toggles every time you start
        then place them in the NMON shell variable. For example:
         export NMON=cmdrvtan

Others:
        a)   Do you want to stop nmon - kill -USR2 <nmon-pid>
        b) Use -p and nmon outputs the background process pid
        c) To limit the processes nmon lists (online and to a file)
           Either set NMONCMD0 to NMONCMD63 to the program names
           or use -C cmd:cmd:cmd etc. example: -C ksh:vi:syncd
        d) To limit the disks nmon lists up to 64 (online only)
           Use -k diskname,diskname,diskname (Example -k hdisk2,hdisk0,hdisk3)