OceanBase Community Monthly: Major Updates to PowerMem, OMS, and obdiag

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OceanBase Community Monthly for May 2026: PowerMem v1.0.0 integrates pyseekdb for embedded vector storage, OMS V4.2.13-CE adds ES, MongoDB, and ClickHouse data sources, obdiag 4.3.0 launches an MCP-based intelligent diagnosis Agent, plus kernel defect fixes and community updates.

OceanBase Community Monthly overview:

  • The OceanBase community released PowerMem v1.0.0 (integrates pyseekdb, no separate database deployment needed, supports embedded vector storage)
  • OMS V4.2.13-CE (adds ES, MongoDB, ClickHouse, and other data sources)
  • obdiag 4.3.0 (an MCP-based intelligent diagnosis Agent — the AI diagnosis Agent goes live)

OceanBase Community Monthly cover image

PowerMem v1.0.0: Now Officially Supports Embedded seekdb as a Storage Backend

PowerMem is a lightweight component, open-sourced under Apache 2.0, designed to solve the memory problem in AI applications. The most important change in this release is the integration of pyseekdb, which enables embedded seekdb backed by OceanBase vector storage: just specify a local data directory to run it, with no separate database service required.

OceanBase V4.4.1_CE_HF4: Critical Defect Fixes

  • Optimized full-text index building to resolve memory bloat caused by IK tokenization of very large text
  • Fixed a failure of the upgrade_health_checker script during the upgrade phase when a replicated table contains a vector index
  • Optimized the vector follow synchronization mechanism to fix the large-scale data backfill that could be triggered after a leader switch
  • Optimized the long execution time for non-primary-key large accounts in scenarios combining the JSON_OVERLAPS expression with vector filters
  • Fixed an inconsistency between SQL query results and brute-force search results when HNSW_BQ is used with a BETWEEN query
  • Fixed missing data in pre_filter queries when a prefix index and a semantic index coexist

OceanBase V4.3.5_CE_BP6: Critical Defect Fixes

  • Fixed an “unsupported” error 1235 when querying a multi-value index with a specified Hint
  • Fixed a possible coredump when rebuilding a vector index
  • Fixed error -7605 for HNSW index queries in LATENCY_FIRST mode and out-of-memory issues for IVF indexes
  • Fixed an exception caused by double-free of the vector index adapter, and a memory leak in the IVF cache manager
  • Fixed data loss during parallel backfilling of HNSW index data
  • Fixed a DDL hang caused by the lack of mutual-exclusion logic between vector index DDL and background tasks

OBD: Installation and Deployment Tool Adds Support for Deploying seekdb

Supports seekdb installation and deployment, primary-standby setup, and primary-standby operations.

OMS V4.2.13-CE: New Multi-Source Support

Adds ES, MongoDB, ClickHouse, and other data sources, and supports enabling TLS for OceanBase.

Data Source Schema Migration Full Data Migration Incremental Sync Full Verification Reverse Incremental
MySQL -> OB-CE Supported Supported Supported Supported Supported
OB-CE -> OB-CE Supported Supported Supported Supported Supported
TiDB -> OB-CE Supported Supported Supported Supported Supported
PostgreSQL -> OB-CE Supported Supported Supported Supported Supported
HBase -> OB-CE Supported Supported Supported Not yet supported Not yet supported
Elasticsearch -> OB-CE Not supported Supported Supported Not supported Not supported
MongoDB -> OB-CE Not supported Supported Supported Not supported Not supported
ClickHouse -> OB-CE Not supported Supported Not supported Not supported Not supported

obdiag 4.3.0: New Intelligent Diagnosis Agent Command

Adds an intelligent diagnosis Agent command (obdiag agent), built on Pydantic-AI and MCP, which supports describing diagnostic needs in natural language. Adds the obdiag tool sql_syntax command. The default max_workers for cluster inspection is adjusted to 6, and task_timeout_seconds (default 60 seconds) is added.

Ecosystem Product Certification Progress: 11 New Compatible Products

Covering enterprises such as Beijing Zhongrui Tianxia, Wuhan Zhongzhi Digital, and Beijing Xinruan Tongchuang.

Community Updates

  1. The April 25 Shenzhen Meetup wrapped up successfully — “Storage-Compute Evolution in the Agent Era”
  2. The community’s free course Easy “Data x AI” has been updated with 12 lessons
  3. May 30 Shanghai Meetup — OceanBase × LangChain

Shanghai OceanBase × LangChain Meetup event poster

Illustration of OceanBase community events and course updates

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