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Need to know impact/issues with RAC on Advanced queueing [message #136541] Thu, 08 September 2005 11:47 Go to next message
rsone
Messages: 7
Registered: June 2005
Location: Jacksonville
Junior Member
I would like to know what are the known issues or impact of RAC in advanced queueing
Re: Need to know impact/issues with RAC on Advanced queueing [message #137272 is a reply to message #136541] Wed, 14 September 2005 03:54 Go to previous message
Frank Naude
Messages: 4410
Registered: April 1998
Senior Member
Yes, there are:

"Real Application Clusters (RAC) can be used to ensure highly available access to queue data. The entry and exit points of a queue, commonly called its tail and head respectively, can be extreme hot spots. Because RAC may not scale well in the presence of hot spots, limit usual access to a queue from one instance only. If an instance failure occurs, then messages managed by the failed instance can be processed immediately by one of the surviving instances."

Source: Oracle Streams Advanced Queuing User's Guide and Reference

Best regards.

Frank
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