Month: March 2012

oracle 不允许truncate 一个启用外键引用的父表，因为truncate 不会触发任何trigger和任何constraint验证，当然它也不会关心子表是不是真的为空或是不是没有参照。

DBMS_SHARED_POOL 是从10.2开始提供的包，可以访问shared_pool中的对象，功能检查大于批定大小的对象，加入/移除shared_pool对象，11.1再完善..

sql>ALTER DATABASE OPEN;
ALTER DATABASE OPEN
*
ERROR at line 1:
ORA-01092: ORACLE instance terminated. Disconnection forced

这两天一个库因操作了基表的dictionary出错，测试一下正常的drop tablespace做了哪些操作

—- Error Stack Dump —–
ORA-00600: 内部错误代码, 参数: [kghrcdepth:ds], [0x7FFE37407008], [], [], [], [], [], [], [], [], [], []
—– SQL Statement (None) —–
Current SQL information unavailable – no cursor.

Verify that your KEEP pool is sized properly to cache frequently referenced tables and indexes. Moving frequently-referenced tables and indexes to SSD or the WriteAccelerator will significantly increase the speed of small-table full-table scans.

ORA-39083: Object type INDEX failed to create with error:
ORA-30032: the suspended (resumable) statement has timed out
ORA-01659: unable to allocate MINEXTENTS beyond 59 in tablespace ICMETBS
ORA-39125: Worker unexpected fatal error in KUPW$WORKER.UNLOAD_METADATA while calling DBMS_METADATA.FETCH_XML_CLOB

investigate moving your high-write datafiles to a smaller data buffer to improve the speed of the database writer process.

“Consistent gets – examination” is different than regular consistent gets. It is used to read undo blocks for consistent read purposes, but also for the first part of an index read and hash cluster I/O