Buffered Message Propagation Can Experience a Latency of up to 30 Sec (Doc ID 1356666.1)

Last updated on AUGUST 12, 2014

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Information in this document applies to any platform.

Symptoms

Streams LCR non-CCA propagation can experience up to a 30 second delay after upgrading a Streams environment from 10.2 to 11.2.0.2.

After enabling the propagation tracing event event 24040 at level 10 we see the following reported in the job_queue_processs trace file

kwqjbwscb: sleep 1 centisecond
kwqjbwscb: sleep 2 centisecond
kwqjbwscb: sleep 4 centisecond
kwqjbwscb: sleep 8 centisecond
kwqjbwscb: sleep 16 centisecond
kwqjbwscb: sleep 32 centisecond
kwqjbwscb: sleep 64 centisecond

*** 2011-05-24 11:55:35.026
kwqjbwscb: sleep 100 centisecond

*** 2011-05-24 11:55:36.027
kwqjbwscb: sleep 100 centisecond

...

So the job_queue_process handling the propagation schedule is sleeping while LCRs are waiting to be propagated.

Changes

Upgrade of a Streams databases to 11.2.0.2 from 10.2

Cause

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