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Spotlight on Oracle 11.0 - Getting Started Guide

Welcome to Spotlight Install Spotlight Start Spotlight Spotlight on Oracle Spotlight on Oracle Data Guard Spotlight on Oracle RAC Spotlight on Unix Spotlight on Windows Troubleshooting: Connection Problems

Log Switch Time Alarm

The Log Switch Time alarm occurs if the amount of time spent waiting for log switch events exceeds a threshold.

A log switch must occur whenever a log file is full. Usually the log switch time is trivial, but it can become significant in the following circumstances:

  • The next redo log to be used is not available because the checkpoint that started when the log was switched is not complete, or
  • The redo log has not yet been archived.

These problems usually occur when redo log I/O rates are sub-optimal, or when the number or size of redo logs is insufficient. For more information, see Improve Redo Log Writer Performance.

 

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