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qdrant-indexing-performance-optimization

Diagnoses and fixes slow Qdrant indexing and data ingestion. Use when someone reports 'uploads are slow', 'indexing takes forever', 'optimizer is stuck', 'HNSW build time too long', or 'data uploaded but search is bad'. Also use when optimizer status shows errors, segments won't merge, or indexing threshold questions arise.

skills/qdrant-performance-optimization/indexing-performance-optimization/SKILL.md

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# What to Do When Qdrant Indexing Is Too Slow

Qdrant does NOT build HNSW indexes immediately. Small segments use brute-force until they exceed `indexing_threshold_kb` (default: 20 MB). Search during this window is slower by design, not a bug.

- Understand the indexing optimizer [Indexing optimizer](https://search.qdrant.tech/md/documentation/operations/optimizer/?s=indexing-optimizer)


## Uploads/Ingestion Too Slow

Use when: upload or upsert API calls are slow.
Identify bottleneck: client-side (network, batching) vs server-side (CPU, disk I/O)

For client-side, optimize batching and parallelism: