Re: cursor: pin S wait on X querying data dictionary

  • From: GG <grzegorzof@xxxxxxxxxx>
  • To: cstephens16@xxxxxxxxx, oracle-l <Oracle-L@xxxxxxxxxxxxx>
  • Date: Sat, 30 Jun 2018 09:36:33 +0200

W dniu 2018-06-29 o 16:26, Chris Stephens pisze:

3-node RAC 12.2 database on Centos7

We have an application which makes use of SQLAlchemy that is suffering mightily from "cursor: pin S wait on X" executing the following SQL:

Hi,
 as a general source of information I'd recommend https://andreynikolaev.files.wordpress.com/2016/03/latches_and_mutexes_in_oracle_12c.pdf
especially 'Divide and Conquer the Mutex Contention paragraph'.
Having said that keep in mind it is a fixing from wrong side.
Regards.
G


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