The writer thread may accidentally cause DTM deadlock. When it does so, it will wait for a minute and then issue an emergency timeout based commit regardless of the session's intended commit behavior. Previously, this type of commit was silent, now it will print a message in the log. If this message appears a lot in the log then the writer deadlock issue is a serious performance concern.
This can happen if the DTM buffer settings are set lower than what is needed.
Troubleshooting WRT_8165 related issues (KB 158086)
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