Oracle Scheduler Locking Tasks Causing Performance Issues (Doc ID 2328223.1)

Last updated on JULY 14, 2020

Applies to:

Symptoms

Scheduler locking Tasks for more time, which is causing Performance issues.

Since upgrading to 12.1.3 the optimizer run cycles have more than doubled, and more importantly, it is locking records that it should not.
This locking issue was fixed in 12.1.2, but this fix does not seem to have been included in 12.1.3.

This is happening frequently since upgrade, locking Mobile updates for as long as 10 minutes in some cases.

SQL in v$session:

BEGIN csr_scheduler_pvt.get_qualified_resources
 (p_api_version => 1.0,
  p_init_msg_list => fnd_api.g_true,
  x_return_status => :1,
  x_msg_count => :2,
  x_msg_data => :3,
  p_task_id_tbl => :4,
  p_start_date_tbl => :5,
  p_end_date_tbl => :6,
  x_task_resources_tbl => :7); END;

Changes

Cause

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