v2.6.11

## v2.6.11

Release date: February 12, 2026

| Milvus Version | Python SDK Version | Node.js SDK Version | Java SDK Version | Go SDK Version |
|:-------------- |:------------------|:--------------------|:-----------------|:---------------|
| 2.6.11         | 2.6.9             | 2.6.9               | 2.6.13           | 2.6.1          |

We are pleased to announce the release of Milvus 2.6.11! This update continues to enhance query performance and system stability with improvements to filtering execution, segment loading, and Storage V2 I/O pipelining. It also refines geo indexing, reduces memory usage in default-value chunks, and improves developer and build tooling through dependency and test-suite cleanups. This release further fixes several correctness issues across control-channel handling, index building, nullable-expression semantics, and WAL recovery workflows. We recommend all users on the 2.6 branch upgrade to this version for improved reliability and performance.

### Features

- Added a truncate API to remove collection data more efficiently ([#47308](https://github.com/milvus-io/milvus/pull/47308))

### Improvements

- Used `PreparedGeometry` to improve geo index refinement performance ([#47389](https://github.com/milvus-io/milvus/pull/47389))
- Switched the OpenSSL dependency to shared linking ([#47664](https://github.com/milvus-io/milvus/pull/47664))
- Differentiated load priorities by scenario to improve scheduling behavior ([#47594](https://github.com/milvus-io/milvus/pull/47594))
- Upgraded Go to 1.24.12 and updated `gpgv` to address CVEs ([#47562](https://github.com/milvus-io/milvus/pull/47562))
- Reduced memory usage by enabling multi-cell `DefaultValueChunk` layout ([#47166](https://github.com/milvus-io/milvus/pull/47166))
- load-diff based segment loading patches to improve load efficiency ([#47545](https://github.com/milvus-io/milvus/pull/47545))
- Removed redundant bitset count operations during filter execution to reduce CPU overhead ([#47546](https://github.com/milvus-io/milvus/pull/47546))
- Added semantic highlighting support for dynamic fields ([#47464](https://github.com/milvus-io/milvus/pull/47464))
- Reduced unnecessary `PinWrapper` copies in `searchPksWith` to improve query performance ([#47531](https://github.com/milvus-io/milvus/pull/47531))
- Normalized constant-folded boolean expressions to `AlwaysTrueExpr`/`AlwaysFalseExpr` during rewriting for simpler plans ([#47493](https://github.com/milvus-io/milvus/pull/47493))
- Added RESTful `search_by_pk` support ([#47318](https://github.com/milvus-io/milvus/pull/47318))
- Optimized “latest delete snapshot” handling to reduce overhead ([#47409](https://github.com/milvus-io/milvus/pull/47409))
- Added support for user-specified warmup settings ([#47343](https://github.com/milvus-io/milvus/pull/47343))
- Added `LoadWithStrategyAsync` to enable true I/O pipelining in Storage V2 ([#47427](https://github.com/milvus-io/milvus/pull/47427))
- Optimized MixCoord's CPU and memory usage by avoiding redundant calculations in the balance checker ([#47190](https://github.com/milvus-io/milvus/pull/47190))
- Added sparse filtering support in search ([#47447](https://github.com/milvus-io/milvus/pull/47447))
- Reduced memory allocations and copies during data loading ([#47088](https://github.com/milvus-io/milvus/pull/47088))

### Bug fixes

- Fixed an issue where collection metadata could contain an invalid database name ([#47721](https://github.com/milvus-io/milvus/pull/47721))
- Ensured exclusive control-channel messages acquire a global lock in the lock interceptor ([#47678](https://github.com/milvus-io/milvus/pull/47678))
- Fixed channel exclusive mode state loss and vchannel list handling issues ([#47702](https://github.com/milvus-io/milvus/pull/47702))
- Fixed index building to use the correct global offset for `null_offset_` in `BuildIndexFromFieldData` ([#47708](https://github.com/milvus-io/milvus/pull/47708))
- Improved v2.5/v2.6 compatibility handling in `SyncTargetVersion` (QueryNode) ([#47693](https://github.com/milvus-io/milvus/pull/47693))
- Handled `broadcastToAll` messages on the control channel in recovery storage ([#47640](https://github.com/milvus-io/milvus/pull/47640))
- Added `warmupKey` to the `CheckParams` filter to make `CreateIndex` idempotent ([#47607](https://github.com/milvus-io/milvus/pull/47607))
- Corrected the default `mmap` value in code ([#47490](https://github.com/milvus-io/milvus/pull/47490))
- Populated `LevelZeroSegmentIDs` in `GetDataVChanPositions` ([#47597](https://github.com/milvus-io/milvus/pull/47597))
- Corrected null handling on `NullExpr`, `ExistsExpr`, and logical operators ([#47519](https://github.com/milvus-io/milvus/pull/47519))
- Removed `segment_loader` pre-reserve logic for warmup fields/indexes to avoid incorrect reservations ([#47463](https://github.com/milvus-io/milvus/pull/47463))
- Updated `log_*` macros to use `{}` placeholders to avoid treating error messages as format strings ([#47485](https://github.com/milvus-io/milvus/pull/47485))
- Fixed bloom filter memory leak when a worker node crashes ([#47451](https://github.com/milvus-io/milvus/pull/47451))
- Used actual data timestamps for imported segment positions ([#47370](https://github.com/milvus-io/milvus/pull/47370))
- Rebuilt WAL messages on each append retry to avoid panics ([#47480](https://github.com/milvus-io/milvus/pull/47480))
- Filled in the log and memory size fields in `TextIndexStats` metadata ([#47476](https://github.com/milvus-io/milvus/pull/47476))
- Reduced the empty timetick filtering interval to improve timetick handling ([#47471](https://github.com/milvus-io/milvus/pull/47471))