If greater than 0, a hint to the Tracer to do its best to capture the trace.
If 0, a hint to the trace to not-capture the trace.
If absent, the Tracer should use its default sampling mechanism.
If greater than 0, a hint to the Tracer to do its best to capture the trace.
If 0, a hint to the trace to not-capture the trace.
If absent, the Tracer should use its default sampling mechanism.