milvus-io/milvus v2.6.11

milvus-2.6.11

on GitHub

v2.6.11

Release date: February 12, 2026

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)

Improvements

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

Bug fixes

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