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Spotlight on Oracle 10.9 - 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 Spotlight on MySQL Troubleshooting: Connection Problems

Average Time to Sync a Redo Log Entry Alarm

The Average Time to Sync a Redo Log Entry alarm is activated when the time taken to write redo log entries during a commit exceeds a threshold. Oracle sessions that perform a COMMIT must wait for redo log writes to complete before they can continue processing; redo log devices should therefore be placed on fast devices.

Most modern disks should be able to process a redo log write in less than 20 milliseconds, and often much less. To reduce redo write time see Improve Redo Log Writer Performance.

Note: In earlier versions of Spotlight on Oracle, this alarm was known as the Average Redo Write Time alarm.


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