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

  • From: kunwar singh <krishsingh.111@xxxxxxxxx>
  • To: Stefan Koehler <contact@xxxxxxxx>
  • Date: Tue, 21 Jan 2020 07:28:59 -0500

Thanks Stefan. Very helpful!

On Tue, Jan 21, 2020 at 2:16 AM Stefan Koehler <contact@xxxxxxxx> wrote:

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: @OracleSK

kunwar singh <krishsingh.111@xxxxxxxxx> 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



-- 
Cheers,
Kunwar

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