Broadcast on commit and log file sync

  • From: saurabh manroy <saurabhmanroy@xxxxxxxxx>
  • To: oracle-l <oracle-l@xxxxxxxxxxxxx>
  • Date: Fri, 24 Feb 2012 10:56:53 +0100

Hello All,
I am seeing the following message in lgwr tracefile along with 'log write
time wait time' warnings:

Warning: log write broadcast wait time 3000ms

This is a RAC database (Version We are using default BOC SCN scheme.

My question is: In RAC, Can this wait time exacerbate problems of log
file sync waits ? Any known conditions ?

There are few bugs (e.g. 7716356) on MOS pointing to increase in log
file sync waits due to BOC scheme, but i am unable to draw a clear
picture in my mind about the whole mechanism of BOC and how can it
impact log file sync.

Any comments are welcome.


Saurabh Manroy


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