...
Classifies the search query result events into time buckets of the specified time period.
Syntax
interval N [milliseconds, seconds,minutes,days,weeks,months] starting TIME
...
Description: The number of units of time into which to classify the search query result events
Unit of time
Syntax: milliseconds, seconds, minutes, days, weeks, or months
...
From the events in access log, shows the number of events per day starting at 08:00:00.
Example 3:
* in log.memoryUsage | avg usage | interval 50 milliseconds
From the events in memoryUsage log, shows the average of used memory (usage) in 50 milliseconds interval.