Grafana Loki - Log Aggregation Docs : https://grafana.com/docs/loki/latest/ Indexes only metadata (labels), not full log content — dramatically cheaper than full-text search systems. LogQL Quick Reference Log Stream Selector (required in every query) Line Filters (pipeline stage 1 - put first for performance) Parsers Label Filters (after parsers) Line Format Label Format Drop/Keep Labels Decolorize Metric Queries Log Range Aggregations Aggregation Unwrapped Range Aggregations (numeric values from logs) Offset Modifier Practical Examples Error rate alert query Slow requests HTTP 5xx errors wit…