Large Number of Wnnn Background Processes Are Spawned On 12.1.0.2 And Above

(Doc ID 2297950.1)

Last updated on AUGUST 17, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.2 and later
Information in this document applies to any platform.

Goal

Starting 12.1.0.2, large number of Wnnn processes (Space Management Background Slaves) may be spawned, as compared to 11.2.0.4. 
This document describes the changes between versions and what precautions may be necessary.

Solution

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