wlmperf
These reports are generated from data that is collected using the same mechanism as the wlmstat command. However, the wlmmon and wlmperf commands use recordings made by a daemon that must operate at all times to collect WLM data. For the wlmmon command, this daemon is called xmwlm, and ships with the base AIX. For the wlmperf command, this daemon is called xmtrend and ships with the PTX.
Report Browser menu options:
| Save | Save the current report |
| Cancel | Exit the report browser |
| OK | Display a selected report |
| Copy | Copy the selected report to a new name |
| Delete | Delete a selected report |
| Trend Box | Indicates that a trend report of the selected type will be generated. Trend reports allow the comparison of two different time periods on the same display. Selecting this box enables the End of first interval field for editing. |
| Width of interval | Represents the period of time covered
by any display type measuring either from the latest values available in
the recording, or from user-input time selections. Interval widths are
selected from this menu. The available selections vary, depending upon
the tool being used:
|
| End of first interval | Represents the end time of a period of interest for generating a trend report. The first interval always represents a time period ending earlier than the last interval. This field can only be edited if the Trend Box is selected. |
| End of last interval |
|
| Scope | Allows the user to select a tier or class-based scope for the display. This display will vary, as tier and class concepts vary between the AIX releases (AIX 4.3 classes versus AIX 5.1 superclass and subclass definitions). |
| Selection | Allows selection of including and excluding the WLM tiers or classes available in the recording. |
| WLM Console | Selections for printing or closing the display. |
| Time Period | Displays the time period defined in the Report Properties Panel. For trend reports comparing two time periods, two time displays are shown. |
| Tier Column | Displays the tier number associated with a class. For AIX 5.1, the column has two entries, for superclass tier (left) and subclass tier (right). |
| Class Column | Displays the class name. |
| Resource Columns | Displays the resource information based off of the type of graphical report selection chosen. These are described below. |
| Status Area | Displays a set of global system performance metrics that are also recorded to aid in analysis. The set displayed may vary between AIX releases, but will include metrics such as run, queue, swap queue, and CPU busy. |
If the snapshot display is trended, the earlier (first) analysis period is shown by an arrow pointing from the earlier measurement to the later (second) measurement. If there has been no change between the periods, no arrow is shown.
| Number Sampled | Number of recorded samples for this period |
| Share Value | Computed share value target by WLM |
| Mean Value | Calculated average over the sample period |
| Standard Deviation | Computed standard deviation |
| Defined Min | Class minimum defined in WLM limits |
| Observed Min | Actual observed minimum across time period |
| Defined Soft Max | Class soft maximum defined in WLM limits |
| Defined Hard Max | Class hard maximum defined in WLM limits |
| Observed Max | Actual observed minimum across time period |
For the Performance Toolbox tool wlmperf, these recordings are limited to 1 year. For the PTX, the xmtrend daemon is used, and uses a configuration file for recording preferences. A sample of this configuration file for WLM-- related recordings is located at /usr/lpp/perfagent.server/xmtrend_wlm.cf. Recording customization, startup, and operation are the same as those described for the xmtrend daemon.
For the base AIX, the xmwlm daemon is used to collect WLM data and cannot be customized.
For recordings to be created, adequate disk allocations must be made for the /etc/perf/wlm directory, allowing at least 10 MB of disk space. Alternatively, you can create link or special filesystem for recordings and mount it to /etc/perf/wlm. The recording daemon should be started from an /etc/inittab entry so that recordings can automatically restart after system reboots. The daemon will operate whether the WLM subsystem is in active, passive, or disabled (off) modes. However, recording activity is limited when WLM is off.
| /usr/bin/wlmmon | base AIX |
| /usr/bin/xmwlm | base AIX |
| /usr/bin/wlmperf | Performance Toolbox |
| /usr/lpp/perfagent.server/xmtrend.cf | Performance Toolbox |
| wlmmon and xmwlm | Located in the perfagent.tools fileset. |
| wlmperf and xmtrend | Available only with the Performance Toolbox product media. |