LagLens

LagLens is a web app (with lightweight agents) that continuously verifies the freshness and completeness of time-series data pipelines across popular TSDBs. Instead of monitoring only CPU or query latency, it measures “data truth”: end-to-end ingest delay, missing intervals, late-arriving points, and cardinality explosions that silently degrade performance and analytics. It connects to InfluxDB, TimescaleDB, Prometheus remote-write, ClickHouse, and Kafka to compare expected vs. observed event rates per metric, tag set, and source. It alerts when SLAs like “99% of points available within 60 seconds” are violated, and provides a root-cause view that pinpoints where lag starts (agent, broker, write path, compaction, retention, or query layer). It’s a traditional app with optional AI-assisted anomaly explanations and suggested remediation steps, but it doesn’t pretend to auto-fix everything.