How to Debug Qdrant with Metrics

First check optimizer status. Most production issues trace back to active optimizations competing for resources. If optimizer is clean, check memory, then request metrics.

Optimizer Stuck or Too Slow

Use when: optimizer running for hours, not finishing, or showing errors.

• Use /collections/{collection_name}/optimizations endpoint (v1.17+) to check status Optimization monitoring
• Query with optional detail flags: ?with=queued,completed,idle_segments
• Returns: queued optimizations count, active optimizer type, involved segments, progress tracking
• Web UI has an Optimizations tab with timeline view and per-task duration metrics Web UI
• If optimizer_status shows an error in collection info, check logs for disk full or corrupted segments
• Large merges and HNSW rebuilds legitimately take hours on big datasets. Check progress before assuming it's stuck.

Memory Seems Too High