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Database Tuning (MOSC)

Frequent enq: TX - row lock contention

May 12, 2016 10:54AM edited May 13, 2016 3:25PM in Database Tuning (MOSC) 7 commentsAnswered ✓

Hi,

My statspack reports display frequently the event "enq: TX - row lock contention" on the top of the events :

By example :

Top 5 Timed Events	Avg %Total
~~~~~~~~~~~~~~~~~~	wait Call
Event	Waits	Time (s) (ms) Time

----------------------------------------- ------------ ----------- ------ ------

enq: TX - row lock contention	79	4,813 60929 52.1
CPU time	3,684	39.9
db file sequential read	90,165	612	7	6.6
direct path read	141,770	89	1	1.0
log file parallel write	7,830	8	1

What can I do in order to identify the sql code causing that problem ?

0

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