Oracle 18.3 hidden undocumented parameter list

  • 2018/07/31
  • Cloud, ORACLE 9i-23ai
  • 14,300 views
  • Oracle 18.3 hidden undocumented parameter list已关闭评论

here is all of the Oracle 18c 18.3 on-premises hidden u […]

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Troubleshoot 11.2.0.4 CRS stop fail, ora.asm resource “UNKNOWN”state

  • 2018/07/31
  • ORACLE 9i-23ai
  • 795 views
  • Troubleshoot 11.2.0.4 CRS stop fail, ora.asm resource “UNKNOWN”state已关闭评论

前几日朋友一套CRS停不下来，RAC版本是11.2.0.4, 停在关闭ASM阶段， 手动尝试了停资源也不成功，使用-f选项一样失败， 查看ora.asm资源当前是UNKNOWN状态.

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Troubleshoot DDL递归SQL触发的row cache lock deadlock(死锁)

  • 2018/07/30
  • ORACLE 9i-23ai
  • 927 views
  • Troubleshoot DDL递归SQL触发的row cache lock deadlock(死锁)已关闭评论

两个同时启动的JOB， truncate 了不同的对象DDL， 递归触发了DDL trigger的审计操作，在insert DDL日志表时，遇到了回收站空间再利用，再次递归触发了drop table BIN$ purge, 又属于DDL操作, 并且申请的回收站对象的row cache enqueue时，在2个跨实例会话互相等待对方持有对象lock造成死锁

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Troubleshooting Wait event “inactive Transaction Branch”

  • 2018/07/24
  • ORACLE 9i-23ai
  • 46 views
  • Troubleshooting Wait event “inactive Transaction Branch”已关闭评论

the wait event “inactive transaction branch” are related to externally coordinated transaction branches, typically from XA clients.
A wait on this event typically means that the XA client/s have asked different sessions to work on the same transaction branch concurrently.

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