om happening, config changes can be canaried to a small set of Mixer instances, and then more broadly rolled out.</p><p>Mixer doesn’t yet do canarying of config changes, but we expect this to come online as part of Istio’s ongoing work on reliable config distribution.</p><h3 id="cache-tuning">Cache tuning</h3><p>We have yet to fine-tune the sizes of the sidecar and Mixer caches. This work will focus on achieving the highest performance possible using the least amount of resources.</p><h3 id="cache-shari