Milvus vs Qdrant

Milvus

• Milvus query node runs out of memory when loading large collections(8/10)
• Slow search after restart, scaling or heavy filters(7/10)
• Free Zilliz Cloud cluster first query times out(4/10)

Qdrant

• Slow startup with large collections(6/10)
• gRPC slower than REST with payloads(5/10)
• Initial ingestion hiccups at large scale(5/10)

Milvus

• Search fails with 'collection not loaded' until you index and load(6/10)
• Vector dimension mismatch errors when switching embedding model(6/10)
• Freshly inserted data does not show up in search(5/10)
• Concurrent bulk inserts hit 'DataNode resource not enough'(5/10)

Qdrant

• UI is limited - no bulk operations(5/10)
• No built-in visualization capabilities(4/10)
• UI randomly stuck on loading(4/10)

Milvus

• Index not exist error after creating a collection(5/10)
• Cluster mode is heavy to run yourself(7/10)

Qdrant

• Steep learning curve for vector DB newcomers(5/10)

Milvus

• Connection refused or timeout on localhost:19530(6/10)
• etcd and MinIO dependencies cause startup crashes(8/10)

Qdrant

• Startup panic errors after version upgrades(7/10)
• Instance corruption after container restarts(8/10)
• Server stops responding under normal load(6/10)

Milvus

• Zilliz Cloud Dedicated starts at $126/month and scales with vectors(6/10)

Qdrant

No signals

Milvus

• Many production questions stay open on GitHub(5/10)

Qdrant

No signals