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PRM DUL Oracle Database Health Check
This document discusses various methods for checking the health of Oracle database storage structures. It describes tools from Oracle like Hcheck scripts, Health Monitor Checks, and Log Scanner that check data dictionary integrity and consistency. It also discusses third party tools like ParnassusData recovery manager and hcmon. Specific checks covered include dictionary integrity checks, data block integrity checks, and ASM health checks. The document provides technical details on how many of these checks operate.
PRM DUL Oracle Database Health Check
- 1. Oracle 数据库存储结构健康检查 ParnassusData 诗檀软件 SeniorProduct Management Director Maclean Liu
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- 3. Oracle 数据库存储结构健康检查 常见手段 •11g以前Hcheck脚本检测数据字典完整性、一致性 • 11g以后Health Monitor Checks ,DBMS_HM DBKH、KTUD • Log Scanner 日志扫描 • ASM Health Checker • Etc • hcmon - Health Check Monitor • dbping - DBping Monitor • logscan - Log Scanner Monitor • ParnassusData recovery managerHM • ORACLE 健康监控设计文档HM_INV.doc • http://docs.oracle.com/cd/B28359_01/server.111/b28310/diag0 07.htm#ADMIN11273
- 4. Hcheck脚本 • 一个纯粹的SQL脚本 • 其输出如OPRHANTAB$、TABPART$ • hcheck.sql 2013年3月最后一次更新 • 本质上是hcheck package • 典型的查询如下：
- 5. 11g Health MonitorChecks • Dbkh DBK Health monitor main layer、 KTU Diagnosability etc – Checks for dictionary consistency – Checks for data corruptions – Checks for undo/redo corruptions – Checks for memory corruptions and fragmentation issues – Checks for RAC (global cache and global enqueues) issues – Checks for Shared cursors (unusual growth of child cursors)
- 6. 11g Health MonitorChecks • DB Structure Integrity Check • Data Block Integrity Check • Redo Integrity Check • Transaction Integrity Check • Undo Segment Integrity Check • Dictionary Integrity Check
- 7. Asm health check •kfhm.c - Kernel Files Health Monitor Checker functions • Checkers in 11.2 • Allocation failure due to OutOfSpace errors • Mount failure due to MissingDisks • Add/Online disk failure due to ClusterwideVisibility issues • FileDrop fails • Mount failure due to InsufficientDisks • Mount failure due to TooManyOfflineDisks
- 8. 字典检测 • prvtsqtk.sql -Package for building SQL Toolkit Checker Meta-data • The Component for these checks will be DICTIONARY with a sub component of CORE_DICTIONARY • Single row checks will be named <object_name>_single_row_check • Cross Row checks will be named <object_name>_cross_row_check • Relationship checks will be named <object_name>_relationship_check
- 9. 字典检测 • Dictionary IntegrityCheck—This check examines the integrity of core dictionary objects, such as tab$ and col$. It performs the following operations: – Verifies the contents of dictionary entries for each dictionary object. – Performs a cross-row level check, which verifies that logical constraints on rows in the dictionary are enforced. – Performs an object relationship check, which verifies that parent- child relationships between dictionary objects are enforced. • The Dictionary Integrity Check operates on the following dictionary objects: • tab$, clu$, fet$, uet$, seg$, undo$, ts$, file$, obj$, ind$, icol$, col$, user$, con$, cdef$, ccol$, bootstrap$, objauth $, ugroup$, tsq$, syn$, view$,typed_view$, superobj$, seq$, lob$, coltype$, subcoltype$, ntab$, refcon$, opqtype$, depen dency$, access$, viewcon$, icoldep$, dual$, sysauth$,objpriv $, defrole$, and ecol$.
- 10. 其他检测 • krbb0.h -Kernel Recovery Backup/restore Backup private declarations Design Specification for Transaction Layer Diagnosability 11gR1 • ktud.h - KTU Diagnosability undo • kcidr.h - Kernal Cache Intelligent Data Repair Header • dbkstk.c - Database Kernel Sql ToolKit
- 11. 我们要做的 • Dictionary 字典检测-- 比较清晰 • ASM检测 --比较清晰 • Undo、Redo、transaction 技术上复杂，是否考虑 做？
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