Understand how to get insights on PI Analysis Service performance

You can view a summary of your PI Analysis Service's performance on the Service Summary tab. Information such as startup time, number of calculations performed, and other details are listed on this tab.

1. Navigate to the Management plug-in, then select the Analyses option in the left pane

   The Analyses tab opens.

2. Select the Service Summary tab.

   The Service Summary tab opens and displays current information about your PI Analysis Service operations and performance.

3. Hover over a tile title to view a pop-up description of the information shown on the tile.

   Tile title	Description
   Service Startup Time	The amount of time between the initial startup of the AF Analysis Service and when the calculation of analytics began.
   Calculations per Second	The average number of analytics calculations evaluated per second.
   Skipped Calculations	The total number of calculations skipped by the AF Analysis Service since its startup.
   Max. Calculation Lag	The latency of the worst-performing analysis since the startup of the AF Analysis Service. This metric includes a built-in wait time of 5 seconds.
   Cache Hit to Miss Ratio	The ratio of the number of AF analysis inputs retrieved from the cache to the number of analysis inputs not in the cache.
   Max. Update Duration	The time taken to update the cache for any AF analysis input.
   Highest Trigger Ratio	The AF analysis template with the highest average trigger ratio. This ratio should be less than 1. This ratio is defined as the template's average elapsed time divided by its average trigger time.