[SOLR-8312] Add doc set size and number of buckets metrics

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.5, 6.0
• Component/s: Facet Module
• Assignee: Unassigned
• Reporter: Michael Sun
• Created: 18/Nov/15 19:41
• Updated: 09/May/16 18:58
• Resolved: 11/Jan/16 16:34

Description

The doc set size and number of buckets represents the input data size and intermediate data size for each step of facet. Therefore they are useful metrics to be included in telemetry.

The output data size is usually defined by user and not too large. Therefore the output data set size is not included.