Filing this here to document a change request for Envoy.

LightStep engineering has observed small reports from new Envoy installations at several customers. These reports are created in the LightStep C++ tracer library, although it is an Envoy configuration default which controls this setting.:

https://github.com/envoyproxy/envoy/blob/master/source/extensions/tracers/lightstep/lightstep_tracer_impl.cc#L153

The LightStep C++ tracer itself uses a default of 2000 for the maximum buffer size. As Envoy is using a per-CPU tracer, we recommend a default of 2000/std::thread::hardware_concurrency() if the tracing.lightstep.min_flush_spans variable is not set.