enq: TX row lock contention and enq:TM contention

Recently, on a production system i observed number of sessions with "waiting" state and the event being "enq: TM contention" and the reason for it was something which i didn't knew earlier.So, i thought of writing on both 'TX' and 'TM' contention. Here i will discuss only few which i have observed are the common … Continue reading enq: TX row lock contention and enq:TM contention