http://blog.gmora.work/tags/prometheus/Recent content in Prometheus on Mora's blogHugoen-USWed, 21 Oct 2026 14:23:41 -0600http://blog.gmora.work/cheatsheets/promql/Sat, 03 Jan 2026 00:00:00 +0000http://blog.gmora.work/cheatsheets/promql/<p>Prometheus Query Language reference for monitoring and alerting.</p> <h2 id="metric-types">Metric Types <a class="anchor" href="#metric-types" aria-label="Link to this section">#</a></h2> <table> <thead> <tr> <th>Type</th> <th>Description</th> <th>Use Case</th> </tr> </thead> <tbody> <tr> <td><strong>Counter</strong></td> <td>Monotonically increasing value</td> <td>Request counts, errors</td> </tr> <tr> <td><strong>Gauge</strong></td> <td>Value that can go up or down</td> <td>CPU usage, memory, temperature</td> </tr> <tr> <td><strong>Histogram</strong></td> <td>Distribution of observations</td> <td>Request latency, response sizes</td> </tr> <tr> <td><strong>Summary</strong></td> <td>Similar to histogram with quantiles</td> <td>Precomputed percentiles</td> </tr> </tbody> </table> <hr> <h2 id="data-types">Data Types <a class="anchor" href="#data-types" aria-label="Link to this section">#</a></h2> <p><strong>Instant Vector</strong> - Set of time series at a single timestamp</p>