It's a pretty popular search command and it is used in all sorts of situations. Below are some really cool searches that use mvcombine along with other search commands.

Size distribution of my auto_high_volume buckets

| dbinspect [
  | rest /services/data/indexes      
  | eval index=title      
  | stats values(maxDataSize) as maxDataSize by index      
  | where maxDataSize="auto_high_volume"      
  | eval index="index=".index      
  | stats values(index) as indexes      
  | mvcombine delim=" " indexes     
  | eval search=indexes ] 
| bin sizeOnDiskMB span=2log4 
| chart limit=0 count by sizeOnDiskMB index




This search was developed to visualise if buckets were being rolled early.