 last <code class="highlighter-rouge">expiration</code> duration exceed <code class="highlighter-rouge">maxAmount</code>, Mixer returns a <code class="highlighter-rouge">RESOURCE_EXHAUSTED</code> message to the proxy. The proxy in turn returns status <code class="highlighter-rouge">HTTP 429</code> to the caller.</p><p>The <code class="highlighter-rouge">memquota</code> adapter uses a sliding window of sub second resolution to enforce rate limits.</p><p>The <code class="highlighter-rouge">maxAmount</code> in