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--- aix:workloadmanager [2023/07/24 11:28]
manu
+++ aix:workloadmanager [2024/04/08 18:01] (current)
manu
@@ Line 8: / Line 8: @@
 Some classes exists by default, but you can create additional, for example for DB2, Oracle....
+WLM definitions are stored into /etc/wlm/, you can use **smit wlm**
+{{:aix:aix_wlm01.png|}}
+Before applying a workload, try it in passive mode, and check the load on each class
+<cli prompt='>'>
+root@prod /root> wlmcntrl -p
+</cli>
+Watch using wlmstat
+<cli prompt='>'>
+root@prod /root> wlmstat
+         CLASS    CPU    MEM   DKIO
+  Unclassified   0.00   0.18   0.00
+     Unmanaged   0.01  26.58   0.00
+       Default   1.18  50.09   2.13
+        Shared   0.00   7.18   0.00
+        System   0.66  34.50   3.69
+         TOTAL   1.84  91.95   5.82
+</cli>
 <cli prompt='>'>
@@ Line 26: / Line 47: @@
         System   1.12   2.41   0.35
          TOTAL   3.37  28.09   0.35
+</cli>
+<cli prompt='>'>
+root@prod /root> lsclass -f
+System:
+        memorymin = 1
+Default:
+Shared:
 </cli>
@@ Line 31: / Line 60: @@
   wlmstat 3 100
   nmon (then option W)
+  topas
+<cli prompt='>'>
+root@prod /root> topas –W
+Topas Monitor for host: srv-aix-001nterval: 2      Fri Apr 17 09:08:56 2015
+WLM-Class (Passive)             CPU%      Mem%     Blk-I/O%
+clBP1                        24.70     30.67         1.31
+System                          0.59     34.76         0.00
+clPX6                        10.12     14.86         0.00
+Default                         0.03      4.48         0.00
+Unmanaged                       0.01     26.58         0.00
+Shared                          0.00      7.18         0.00
+Unclassified                    0.00      0.18         0.00
+</cli>
 Check your process class
 <cli prompt='>'>
-root@prod /root> ps -ae -o pid,user,class,args
+root@prod /root> ps -ae -o pid,user,class,args,pcpu,vsz
-     PID     USER CLASS        COMMAND
+     PID     USER CLASS        COMMAND                           %CPU   VSZ
-     root Unclassified /etc/init
+     root System       /etc/init                         0.0   804
- 2949328     root Unclassified /usr/sbin/syncd 60
+     root System       /usr/sbin/syncd 60                0.0   596
- 3211498     root Unclassified /usr/ccs/bin/shlap64
+ 2621880     root System       /usr/ccs/bin/shlap64              0.0   392
- 3801296     root Unclassified /usr/lib/errdemon
+ 3867110     root System       /usr/lib/errdemon                 0.0   928
- 4653308     root Unclassified /usr/sbin/portmap
+ 4325632     root System       /usr/sbin/srcmstr                 0.0   816
- 4849858     root Unclassified /usr/sbin/snmpd
+ 5570884     root Default      iostat -Dsal 60 1                 0.0   844
- 7209188     root System       /usr/sbin/smbd -D
+ 5636536     root System       /usr/sbin/xntpd                   0.0   388
- 7274732   nobody System       /usr/sbin/smbd -D
+ 5833142     root System       /usr/sbin/syslogd -r -n           0.0   820
- 7340260     root System       /opt/rsct/bin/rmcd -a IBM.LPCommands -r -S 1500
+ 5898680     root System       /usr/sbin/portmap                 2.0  1004
- 7405804     root System       [trspoolm]
+ 5964220     root System       /usr/sbin/aso                     0.0  1396
- 7471338     root System       ./mflm_manager
+ 6029626      mqm Default      sshd: mqm@pts/1                   0.1  1188
- 7602278      ek  Default      CONS3
+ 6095302     root System       /usr/sbin/biod 6                  0.0   120
- 7667888      ew  Default      TH
+ 6423002     root System       /usr/sbin/pfcdaemon               0.0  1172
- 7733346      ek  Default      THC
+ 6488524     root System       /usr/sbin/nfsrgyd                 3.0  1352
- 7798796     root System       /opt/rsct/bin/IBM.MgmtDomainRMd
+ 6816036     root System       /opt/rsct/bin/IBM.DRMd            0.0  1696
- 7864420     root System       /opt/rsct/bin/IBM.ServiceRMd
+ 6881784     root System       /usr/sbin/sshd                    0.0  1196
- 7929868     root System       /opt/rsct/bin/IBM.HostRMd
+</cli>
+Print memory in MB
+<cli prompt='>'>
+root@prod /root> ps -ae -o pid,user,class,pcpu,vsz,args | awk '{$5=int(100 * $5/1024)/100"MB";}{ print;}'
+PID USER CLASS %CPU 0MB COMMAND
+root System 0.0 0.8MB /etc/init
+2884068 root System 0.0 0.58MB /usr/sbin/syncd 60
+3342724 root System 0.0 0.38MB /usr/ccs/bin/shlap64
+3604962 root System 0.0 0.9MB /usr/lib/errdemon
 </cli>
@@ Line 99: / Line 151: @@
 Commands to manage classes: mkclass, chclass, rmclass ...
+^Command^ Description^ Usage^
+|mkclass |Creates a WLM class|mkclass <class name> ; mkclass -a inheritance=yes -a localshm =yes <class name>|
+|wlmassign |Assigns a process to a WLM class |wlmassign <class name> <process id>|
+|lsclass |Returns the list of superclasses |lsclass|
+|wlmcheck |Checks WLM settings |wlmcheck|
+|rmclass |Removes a WLM class |rmclass <class name>|
+|wlmcntrl -p |Starts WLM in passive mode|wlmcntrl -p|
+|wlmcntrl -a |Starts WLM in active mode |wlmcntrl -a|
+|wlmcntrl -o |Stops WLM |wlmcntr -o|
+|wlmcntrl -u |Update WLM (refresh after modifications) |wlmcntr -u|
+===== Monitoring =====
+Multiple tools to monitor WLM
+Here example of the class **app1**
+<cli prompt='>'>
+[p630n02][/work]> acctcom -w | grep app1
+prog1 user1 app1.Default pts/2 12:02:48 12:05:22 154.12 144.55 10008.00
+prog1 user1 app1.Default pts/2 12:05:42 12:07:19 97.16 111.80 7705.00
+prog1 user1 app1.Default pts/2 12:09:27 12:10:04 37.20 32.22 4370.00
+prog1 user1 app1.Default pts/2 12:10:14 12:14:42 268.50 233.17 10256.00
+prog1 user1 app1.Default pts/2 12:17:51 12:20:45 174.62 250.88 13296.00
+</cli>
+<cli prompt='>'>
+[p630n02][/work]> acctcom -c app1
+COMMAND START END REAL CPU MEAN
+NAME USER TTYNAME TIME TIME (SECS) (SECS) SIZE(K)
+prog1 user1 pts/2 12:02:48 12:05:22 154.12 144.55 10008.00
+prog1 user1 pts/2 12:05:42 12:07:19 97.16 111.80 7705.00
+prog1 user1 pts/2 12:09:27 12:10:04 37.20 32.22 4370.00
+prog1 user1 pts/2 12:10:14 12:14:42 268.50 233.17 10256.00
+</cli>
+Topas
+<cli prompt='>'>
+[p630n02][/work]> topas -W
+Topas Monitor for host: p630n02 Interval: 2 Mon Oct 25 15:13:04
+WLM-Class (Passive) CPU% Mem% Disk-I/O%
+app1                  47    1         0
+app2                  23    0         0
+app3                  12   55         0
+System                 0    7         0
+Shared                 0    1         0
+Default                0    0         0
+Unmanaged              0   14         0
+Unclassified           0    0         0
+</cli>
+wlmstat
+<cli prompt='>'>
+p630n02][/etc/wlm/current]> wlmstat
+CLASS       CPU MEM DKIO
+Unmanaged     0  14    0
+Default       0   0    0
+Shared        0   1    0
+System        0   7    0
+app1         44   1    0
+app2         22   0    0
+app3          8  55    0
+TOTAL        74  64    0
+</cli>
+<cli prompt='>'>
+[p630n02][/etc/wlm/current]> wlmstat -Svc
+CLASS tr i #pr CPU sha min smx hmx des rap urap pri
+Unmanaged 0 0 0 0 -1 0 100 100 100 100 0 10
+Default 0 0 0 0 -1 0 100 100 100 100 0 0
+Shared 0 0 0 0 -1 0 100 100 100 100 0 0
+System 0 0 80 0 -1 0 100 100 100 100 0 0
+app1 0 1 2 43 -1 0 100 100 100 100 0 0
+app2 0 1 2 19 -1 0 100 100 100 100 0 0
+app3 0 1 1 06 -1 0 100 100 100 100 0 0
+</cli>
+===== Example of config =====
+<cli prompt='>'>
+root@aixtest /etc/wlm/current> cat /etc/wlm/current/classes
+System:
+Default:
+splunk:
+        inheritance = "yes"
+        authuser = "splunk"
+root@aixtest /etc/wlm/current> cat /etc/wlm/current/limits
+System:
+        memory = 1%-100%;100%
+splunk:
+        CPU    = 0%-10%;10%
+root@aixtest /etc/wlm/current> cat /etc/wlm/current/rules
+* class resvd user group application type tag
+splunk   -    splunk -    -           -   -
+System   -    root   -    -           -   -
+Default  -    -      -    -           -   -
+root@aixtest /etc/wlm/current> cat /etc/wlm/current/shares
+* IBM_PROLOG_BEGIN_TAG
+</cli>

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