Re: Is enq: TX - row lock contention a wait or syscall

Hello Kunwar,
as all others already replied: Yes, the wait event "enq: TX - row lock contention" instruments a wait on syscall semtimedop() in the background.

On my website you can find a simple example how the locking / synchronization works: http://www.soocs.de/public/research/190513_semaphore_sync.txt

Best Regards
Stefan Koehler

Independent Oracle performance consultant and researcher Website: http://www.soocs.de
Twitter: _at_OracleSK

> kunwar singh <krishsingh.111_at_gmail.com> hat am 20. Januar 2020 um 15:29 geschrieben:
>
> Hi Listers,
> I am reading the below blog:
>  
> http://carymillsap.blogspot.com/2009/02/dang-it-people-theyre-syscalls-not.html 
>  
> So i have one basic question. Is  enq: TX - row lock contention also a syscall then or am i simplifying it too much?
>
> --
> Cheers,
> Kunwar

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