We are using access logs fields to provide durations type We are using the following

totalDuration: '%DURATION%'
upstreamTime: '%RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)%'

We are getting the values, however its identical value (exact same time ) in the access logs,, why? I guess that the duration should always be greater the upstram_service_time What am I missing here?

1 We need the total time of the calls E2E - for that we use '%DURATION%'
2. How much time it spent e2e on the upstream '%RESP(X-ENVOY-UPSTREAM-SERVICE-TIME)%'

Is it possible to print microseconds ? maybe there we could see the differences