Data history fields, parameters, rules and resolution

The MainView Middleware Monitor (MVMM) history database stores raw (high-resolution) and summarized (low-resolution) values of attributes, where they are available for querying and generating reports. At 30-minute intervals, the History Service compresses the raw data into summarized data, in accordance with the associated history rule.

Data history fields and parameters

The following table lists the History compression parameters.

Parameter	Compressed values
Last	Saves the last value sampled during the one-hour interval (default).
Total	Saves the sum of all sample values sampled during the one-hour interval (default).
Count	Saves the number of sample values taken during the one-hour interval (default).
Avg	Saves the average sample value during the one-hour interval (default).
Min	Saves the minimum (lowest) sample value during the one-hour interval (default).
Max	Saves the maximum (highest) sample value during the one-hour interval (default).
Enable ProactiveNet	Enables data to be sent to a ProactiveNet server. See MVMM ProactiveNet Service for more information.

Configuring history rule parameters

Configure the high-resolution storage duration by setting amount_of_hires_to_keep in services.cfg.

History rule errors

The following errors are possible when attaching objects to templates.

Data compression and history rules

The MVMM History Service distills summarized data from raw data by compressing data every 30 minutes in accordance with the attached history rule. 30 minutes is a non-configurable value.

History rules are essentially data compression rules. They can be created for the numerical properties of objects in the physical tree.

Example

CurrentGetRate is a property of a queue. Because it is a numeric property, it can be used in a history rule definition.

Compression parameters are accessible for each monitored object property in the History tab view pane. You can select more than one compression parameter for each property. Compression parameters are described in History fields and parameters.

The following examples illustrate how to use the compression parameters to create a history rule.

Example

Compress and store the minimum value recorded in the hour.

Select Min compression. The MVMMHistory Service tracks the minimum data value, compresses it each hour (default, unchangeable), and stores it as low-resolution data.

Compress and store the total values of a property.

Select Total as the compression value. The total of all data values reported for that preceding hour are compressed and stored for the associated property.

Compress and store the last recorded value of a property.

Select Last as the compression value. The last data value is compressed at the end of each hour for the associated property.

History rules and templates

A template is a rule holder that contains one rule for attachment to one or more monitored objects.

A template can be attached to one or more monitored objects while an object is attached to zero or one template. You can attempt to attach an object to more than one template but only the first attachment is valid.

Changes to a rule template are applied to all attached objects.

Note

If your template is corrupted, the corruption propagates to all attached objects. Ensure that your backup procedures include the template files.

During an upgrade, the default views and templates (history and event) are overwritten with new defaults. A best practice is not to modify the default templates. Instead, work on copies of the default templates or on new templates.

Data resolution

Data resolution is a measure of the number of reported samples taken of the monitored data per unit time. The higher the data resolution, the more storage resources are used and the greater the network load. Resolution of reported data is set by the sample interval.

Sample interval

The sample interval is the time between data samples of the property being monitored.

agentpref.sh --set 'WebSphere MQ Monitor' SampleInterval 60

The default, configurable sample interval is 60 seconds.