Wait Time for 'enq: TX - row lock contention' During Deadlock Is Always Multiple Of 3 Seconds
(Doc ID 2530567.1)
Last updated on MARCH 18, 2022
Applies to:Oracle Database - Enterprise Edition - Version 18.104.22.168 and later
Information in this document applies to any platform.
During the deadlock detection (ORA-00060), there seems to be a common pattern for the wait time of 'enq: TX - row lock contention' which always reported in multiple of 3 seconds.
Example from the deadlock trace file:
Refer to "wait times:" under "Current Wait Stack:"
Current Wait Stack:
0: waiting for 'enq: TX - row lock contention'
name|mode=0x54580006, usn< wait_id=947 seq_num=948 snap_id=1
wait times: snap=3.000614 sec, exc=3.000614 sec, total=3.000614 sec
wait times: max=infinite, heur=3.000614 sec
wait counts: calls=1 os=1
There is at least one session blocking this session.
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