Detecting performance problems that creep up over a period of time is quite difficult with the current fault management setup that works very well for day-to-day problems such as a sudden spike in CPU Utilization, server outages, etc. It is imperative that gradual performance problems are quickly identified and fixed before it can impact your customer.
For example, if the load on the server increases over a period of time, the response time will gradually be affected and the customer would be frustrated. Anomaly detection in Applications Manager can be the key to detect performance problems like the ones mentioned above.
Anomaly detection helps you know if there is a gradual performance degradation by defining anomaly profiles on performance metrics. By creating anomaly profiles, you can define rules wherein the current data is compared with the previously reported best data (say some six months back when the system was working at optimum level).
Anomaly profiles can be created based on:
Anomaly happens when the current set of values do not conform to the baseline range values. The current Attribute values are compared against the reported data in a particular week [fixed value] or with simply the previous week's data [moving value]. After choosing the week for baseline comparison, each day's value will be compared with the corresponding day of the baseline week. For example, if you choose week 1 of August as baseline week, then every Monday's data will be compared with the value of the Monday of August 1st week.
Anomaly is detected when current data doesn't conform to the user-defined rules [based on system variables]. For example, the user can create a rule such as Anomaly is to be detected when the current Last Hour Average Value is greater than twice the Six Hours Moving Average Value. Critical and Warning alarms can be set accordingly.
Anomaly profiles that are created should be associated with the concerned performance attributes. Suitable Alarm actions like EMail are also associated. For example, if anomaly is detected with response time of the server, EMail notification will be sent to admin for troubleshooting the problem.
Anomaly Dashboard: The performance of the monitors can be viewed from Anomaly Dashboards. It helps in troubleshooting too.