# Aurabase Observability & Logs Reference

> Engines: ClickHouse (analytics store) + Vector (log collector) + PostgreSQL `pg_stat_statements`

## Metrics & Tracing
- **HTTP Traffic**: Request counts, response status codes, P50/P95/P99 latency percentiles.
- **Slow Query Profiling**: `pg_stat_statements` integration accessible in Studio, via CLI (`aura db slowqueries`), and via MCP (`list_slow_queries`).
- **Query Plan Inspection**: `explain_query` tool for PostgreSQL `EXPLAIN ANALYZE` execution plans.
- **Immutable Audit Trail**: Access attempts, schema mutations, and console administrative events.