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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

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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