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Advanced Queuing correlation id [message #429187]

Mon, 02 November 2009 08:09

johnbach
Messages: 32
Registered: June 2009

Member

I have a single QUEUE TABLE.
Will there be any considerable difference in performance(dequeue time) between these two scenario?
scenario 1:
7 Queues each with 1 million entries
scenario 2:
Only one queue,but have 7 different correlation id,each with 1 million entries.

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Re: Advanced Queuing correlation id [message #429218 is a reply to message #429187]

Mon, 02 November 2009 10:22

Michel Cadot
Messages: 68653
Registered: March 2007
Location: Nanterre, France, http://...

Senior Member
Account Moderator

Only a benchmark and your treatments may answer this.
What is your idea to mix up all entries? Why do you want to do this?

Regards
Michel

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Re: Advanced Queuing correlation id [message #429279 is a reply to message #429218]

Tue, 03 November 2009 00:48

johnbach
Messages: 32
Registered: June 2009

Member

Tested both scenario
Scenario 1
Faster even at 80 dequeue per second (~ 1 milli second per dequeue)
ENQUEUE

     qname:='pin_q_'||:new.amount;
      DBMS_AQ.enqueue(queue_name=>qname,

DEQUEUE

qname:='pin_q_'||iamount;
   DBMS_AQ.dequeue(queue_name=>qname,

Scenario 2
Slow (~ 700 milli second for dequeue)
ENQUEUE

l_message_properties.correlation:=:new.amount;
      DBMS_AQ.enqueue(queue_name=>'pin_q',

DEQUEUE

l_dequeue_options.correlation:=iamount;
    l_dequeue_options.navigation:=dbms_aq.FIRST_MESSAGE;
    DBMS_AQ.dequeue(queue_name=>'pin_q',

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