Truncate Takes A Long Time -- Waits on RO enqueue [metalink ID 286363.1]
1. For 10g slow truncate issues, switch off the new feature and revert to 9i functionality model:
ALTER SYSTEM SET "_db_fast_obj_truncate"=FALSE SCOPE=BOTH;
or change the initora/pfile as appropriate.
2. If the performance is to be improved in 9i, try improving the throughput of DBWR.
Setting db_writer_processes can help.
Grid Infrastructure --- OCR and Voting Disks Location at Installation
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In Oracle Grid Infrastructure, the OCR (Oracle Cluster Registry) and
Voting "Disks" must be on Shared Storage accessible by all the nodes of the
Cluster...
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