Generating, aggregating, and querying virtualization service execution metrics for cloud diagnostics at scale

A computer storage medium storing computer-useable instructions that, when used by a computing device, cause the computing device to perform operations comprising:

• tracking execution times of a plurality of types of virtualization service operations executed by a virtualization service provider handling requests from a virtualization service client running in a computer system emulator;
• generating an aggregated representation of the execution times for each type of the plurality of types of the virtualization service operations executed during an interval of time;
• and
• storing the aggregated representation in memory.

A method comprising:

• intercepting an execution call from a virtualization service client running in a child partition to a virtualization service provider running in a parent partition;
• determining an execution metric representing performance of the virtualization service provider in executing a virtualization service operation triggered by the execution call;
• aggregating the execution metric into an aggregation entry representing aggregated performance of instances of the virtualization service operation that were completed during an interval;
• and
• detecting anomalous behavior of the virtualization service operation based on the aggregation entry.