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Spotlight on Oracle 10.8 - 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

Lost Blocks Alarm

Spotlight raises separate alarms for corrupt and lost blocks. The Lost Blocks alarm is raised when the percentage of lost blocks exceeds a threshold as a proportion of total global cache consistent read requests. Possible causes for this alarms are:

  • The Cluster Interconnect has been overloaded by an excessive number of block transfers.
  • Checksum processes have been disabled, and can no longer identify lost blocks.

Possible solutions to these problems are:

  • To upgrade or reconfigure the cluster interconnect.
  • To partition tables or segregate application activity to reduce the number of block transfers.

 

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