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Showing posts from October, 2011

WARNING: Subscription for node down event still pending in Listener log

In the listener log file you constantly get the following warning message. WARNING : Subscription for node down event still pending. The warning messages are related to the Oracle TNS Listener's default subscription to the Oracle Notification  Service (ONS). This subscription to ONS is introduced in Oracle 10g for RAC environment. Listener subscription to ONS is useful to use advanced features like Fast Application Notification events(FAN) , Fast Application Fail over (FAF) and Fast Connection Failover (FCN) in RAC. So in a non-RAC environment subscription to ONS is not needed. So in a standalone system we can disable it and thus avoid warning message.

Point of Interest Oracle GoldenGate

Point of Interest for Oracle GoldenGate View more presentations from joord01 .

Oracle performance and Time Measurements Within a Virtual Machine

Customers often ask to what extent they can trust performance measurements and timing results of the Oracle database within a virtual machine. To fully understand the performance of applications running in a virtual machine, we can give some general guidance.