Gather Schema Statistics FNDGSCST Concurrent Request Runs Very Slow Suddenly

(Doc ID 1616469.1)

Last updated on OCTOBER 03, 2016

Applies to:

Oracle EBS Applications Performance - Version 12.1.3 to 12.2 [Release 12.1 to 12.2]
Information in this document applies to any platform.


On : R12 version, Performance Triage. Any performance issue not covered by an existing component.


Customer run Gather Schema Statistics with the following parameter:
All:80::NOBACKUP::LASTRUN:GATER::Y,But it cost 40 hours

P.S. 1 As per customer saying, It worked normally previous using the similar parameter [ All:80::NOBACKUP::LASTRUN:GATER::Y] only cost 3 hours and did not do anything changes recently!
  they run the Gather Schema Statistics concurrent request every 7 days!
P.S. 2 It took 10 hours to complete even with the Estimate_percent 20 when change Estimate_percent from 80 to 20, this is still much slower than usual normal situation(2- 3 hours cost).

Customer expect they can run Gather Schema Statistics as fast as previously

The issue can be reproduced at will with the following steps:
1. Run Gather Schema Statistics with the following parameter

All:80::NOBACKUP::LASTRUN:GATER::Y,But it cost 40 hours

Due to this issue, users have to wait for 40 hours to make the Gather Schema Statistics complete which is time costing and system resource is highly cost.


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