 role=none aria-label="Performance impact"><a href=#performance-impact>Performance impact</a><li role=none aria-label="Known limitations"><a href=#known-limitations>Known limitations</a></ol><hr></div></nav><p>Istio 1.4 adds alpha support to generate service-level HTTP metrics
directly in the Envoy proxies. This feature lets you continue to monitor your
service meshes using the tools Istio provides without needing Mixer.</p><p>The in-proxy generation of service-level metrics replaces the following HTTP
metr