Metrics. Both methods are called synchronously on the request path, so they must not throw or
block — buffer and ship out of band. count accumulates; observe records one point-in-time
sample (the core observes wall times in milliseconds and backlog gauges as row counts).
Metrics. Both methods are called synchronously on the request path, so they must not throw or block — buffer and ship out of band.
countaccumulates;observerecords one point-in-time sample (the core observes wall times in milliseconds and backlog gauges as row counts).