# Qdrant v1.19.1

- Product: Qdrant (https://whatsnew.fyi/product/qdrant)
- Vendor: Qdrant
- Date: 2026-09-04
- Version: v1.19.1
- Original notes: https://github.com/qdrant/qdrant/releases/tag/v1.19.1
- Permalink: https://whatsnew.fyi/product/qdrant/releases/v1.19.1

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Speed up and saturate memory bandwidth in quantized scoring with prefetching
- **changed** — Rework and batch 4-bit TurboQuant SIMD implementation for better performance
- **changed** — Limit query plane allocations for better search performance
- **changed** — Improve L2 cosine preprocessing performance on AVX
- **changed** — Batch deletion checks for faster full scans
- **changed** — Batch searches in HNSW for faster search
- **changed** — Skip bad items before pushing into HNSW priority queue
- **changed** — Skip point ID resolution in search post processing to improve search performance
- **changed** — Use raw payloads in shard transfer to make payload heavy shard transfers 1.5x faster
- **fixed** — Make set replica state and abort transfer/resharding crash safe to prevent consensus desync
- **fixed** — Make restart transfer operation crash safe to prevent consensus desync
- **changed** — Query shard status more efficiently, don't build full segment info
- **changed** — Faster memory reporting on Linux with cachestat
- **changed** — Probe segment memory utilization outside of read locks
- **changed** — Honor max_segment_size on filter based updates
- **changed** — Support fast HNSW healing cancellation to prevent blocking consensus on shard drop
- **changed** — Raise HTTP2 max pending resets on gRPC API to allow higher connection concurrency
- **added** — Expose used CPU cores in /metrics (cpu_cores_used)
- **changed** — Extend container runtime detection, include Kubernetes and other runtimes
- **fixed** — Fix data consistency, flush CoW segments before building payload index
- **fixed** — Fix Gridstore panic on new page after unsafe shutdown, repairs preexisting failures
- **fixed** — On aborting resharding down, don't block consensus with deferred points for along time
- **fixed** — Reject vector size larger than 65536
- **fixed** — Reject empty dense vectors
- **fixed** — Reject mismatched dimension count in positive/negative examples of recommend average API
- **fixed** — Not specifying scroll limit would bypass max_query_limit
- **fixed** — Prevent underestimating is_empty and is_null cardinality
- **fixed** — Fix is_null filter for unindexed payload fields
- **fixed** — Fix phrase matching on unindexed payload field not respecting token positioning
- **fixed** — Propagate mmap read errors back to user rather than panicking
- **fixed** — Fix concurrent consensus operations awaiters dropping each other
- **fixed** — Limit tracing ID by 256 bytes, not characters
- **fixed** — Clamp picking random HNSW layer to lower bound of zero
- **security** — Reject . and .. in collection names

#### Change log

##### Improvements

* https://github.com/qdrant/qdrant/pull/10342, https://github.com/qdrant/qdrant/pull/10420 - Speed up and saturate memory bandwidth in quantized scoring with prefetching
* https://github.com/qdrant/qdrant/pull/10391, https://github.com/qdrant/qdrant/pull/10392, https://github.com/qdrant/qdrant/pull/10362, https://github.com/qdrant/qdrant/pull/10437, https://github.com/qdrant/qdrant/pull/10439, https://github.com/qdrant/qdrant/pull/10381 - Rework and batch 4-bit TurboQuant SIMD implementation for better performance
* https://github.com/qdrant/qdrant/pull/10441 - Limit query plane allocations for better search performance
* https://github.com/qdrant/qdrant/pull/8650 - Improve L2 cosine preprocessing performance on AVX
* https://github.com/qdrant/qdrant/pull/10042 - Batch deletion checks for faster full scans
* https://github.com/qdrant/qdrant/pull/10054, https://github.com/qdrant/qdrant/pull/10010, https://github.com/qdrant/qdrant/pull/10194 - Batch searches in HNSW for faster search
* https://github.com/qdrant/qdrant/pull/10099 - Skip bad items before pushing into HNSW priority queue
* https://github.com/qdrant/qdrant/pull/10312, https://github.com/qdrant/qdrant/pull/10333 - Skip point ID resolution in search post processing to improve search performance
* https://github.com/qdrant/qdrant/pull/10040, https://github.com/qdrant/qdrant/pull/10066 - Use raw payloads in shard transfer to make payload heavy shard transfers 1.5x faster
* https://github.com/qdrant/qdrant/pull/9760 - Make set replica state and abort transfer/resharding crash safe to prevent consensus desync
* https://github.com/qdrant/qdrant/pull/9786 - Make restart transfer operation crash safe to prevent consensus desync
* https://github.com/qdrant/qdrant/pull/10345 - Query shard status more efficiently, don't build full segment info
* https://github.com/qdrant/qdrant/pull/10455 - Faster memory reporting on Linux with cachestat
* https://github.com/qdrant/qdrant/pull/10457 - Probe segment memory utilization outside of read locks
* https://github.com/qdrant/qdrant/pull/10027 - Honor `max_segment_size` on filter based updates
* https://github.com/qdrant/qdrant/pull/10426 - Support fast HNSW healing cancellation to prevent blocking consensus on shard drop
* https://github.com/qdrant/qdrant/pull/10306 - Raise HTTP2 max pending resets on gRPC API to allow higher connection concurrency
* https://github.com/qdrant/qdrant/pull/10243 - Expose used CPU cores in `/metrics` (`cpu_cores_used`)
* https://github.com/qdrant/qdrant/pull/10132 - Extend container runtime detection, include Kubernetes and other runtimes

##### Bug Fixes

* https://github.com/qdrant/qdrant/pull/10201 - Fix data consistency, flush CoW segments before building payload index
* https://github.com/qdrant/qdrant/pull/10399 - Fix Gridstore panic on new page after unsafe shutdown, repairs preexisting failures
* https://github.com/qdrant/qdrant/pull/10205 - On aborting resharding down, don't block consensus with deferred points for along time
* https://github.com/qdrant/qdrant/pull/10324 - Reject vector size larger than 65536
* https://github.com/qdrant/qdrant/pull/10143 - Reject empty dense vectors
* https://github.com/qdrant/qdrant/pull/10374 - Reject mismatched dimension count in positive/negative examples of recommend average API
* https://github.com/qdrant/qdrant/pull/10382 - Not specifying scroll `limit` would bypass `max_query_limit`
* https://github.com/qdrant/qdrant/pull/10128 - Prevent underestimating `is_empty` and `is_null` cardinality
* https://github.com/qdrant/qdrant/pull/10101 - Fix `is_null` filter for unindexed payload fields
* https://github.com/qdrant/qdrant/pull/10341 - Fix phrase matching on unindexed payload field not respecting token positioning
* https://github.com/qdrant/qdrant/pull/10181 - Propagate mmap read errors back to user rather than panicking
* https://github.com/qdrant/qdrant/pull/10338 - Fix concurrent co

_[Truncated at 4000 characters — full notes: https://github.com/qdrant/qdrant/releases/tag/v1.19.1]_