OceanBase 4.4.1 CE HotFix 3: Vector Index Fixes, Memory Leak Repairs, and Write‑Performance Boosts

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Release overview

OceanBase announced the v4.4.1_CE_HF3 hot‑fix on 18 March 2026. The update is positioned as a stability‑focused patch that incorporates user‑reported fixes and performance tweaks.

Key bug fixes

  • Resolved intermittent 4012 timeout errors in OBKV during batch insertOrUpdate operations.
  • Fixed a memory‑leak in the vector‑index asynchronous task destroy function (leak in VecIdxTaskCtx).
  • Corrected integer overflow in the __all_virtual_vector_index_info table that caused inaccurate vector‑memory statistics.
  • Re‑enabled skyline pruning for vector queries, preventing sub‑optimal plan generation.
  • Adjusted DBMS_VECTOR.SET_ATTRIBUTE to set the correct parallelism when upgrading older vector indexes to the hot‑fix version.
  • Addressed query hangs that could occur during vector‑index upgrades on large data sets with many partitions.
  • Fixed error 4377 that appeared in mixed full‑text and vector search scenarios.
  • Patched HNSW index INSERT ON DUPLICATE KEY UPDATE failures (error 1062) on heap tables.
  • Ensured snapshots are loaded correctly during full rebuild, restart, or upgrade of vector indexes, eliminating redundant asynchronous tasks.
  • Mitigated query‑response‑time regressions caused by incremental vector‑index rebuilds.

Performance enhancement

The hot‑fix also includes an optimisation that speeds up write operations when a vector index is created alongside a table, reducing latency for bulk‑load workloads.

Why it matters

Vector indexes are a core feature for AI‑augmented workloads in OceanBase. The addressed bugs—especially the memory‑leak and skyline‑pruning issues—have been reported to cause stability problems in production clusters handling high‑dimensional data. By fixing these, the hot‑fix improves both reliability and query efficiency, which is critical for enterprises scaling AI‑driven services.

Getting the update

The patch is distributed as RPM oceanbase-ce-4.4.1.0-100030012026031213. Users can upgrade following the standard OceanBase upgrade guide.