Oracle 10g 关于控制文件的等待事件
2016-05-06 00:00
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Oracle 10.2
The session starts a control file transaction (to make sure that the control files are up to date in case the session crashes before committing the control file transaction)
The session commits a transaction to a control file
Changing a generic entry in the control file, the new value is being written to all control files
Making a backup of the control files
Sharing information (between instances) from the control file
Reading other blocks from the control files
Reading the header block
Wait Time: The wait time is the elapsed time of the read
control file parallel write
This event occurs while the session is writing physical blocks to all control files. This happens when:The session starts a control file transaction (to make sure that the control files are up to date in case the session crashes before committing the control file transaction)
The session commits a transaction to a control file
Changing a generic entry in the control file, the new value is being written to all control files
control file sequential read
Reading from the control file. This happens in many cases. For example, while:Making a backup of the control files
Sharing information (between instances) from the control file
Reading other blocks from the control files
Reading the header block
Wait Time: The wait time is the elapsed time of the read
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