PRM DUL Oracle Database Health Check

1. Oracle 数据库存储结构健康检查
ParnassusData 诗檀软件
Senior Product Management Director
Maclean Liu

2. 古希腊的Delphi(世界中心)，屹立着Parnassus
Mount(诗檀山)，山上有一座阿波罗神庙，庙中住着
女祭司(Oracle)

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OPRHAN TAB$、TABPART$
• 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 Monitor Checks
• 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 Monitor Checks
• 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 Integrity Check—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？

12. Thank You
www.parnassusdata.com
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