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Increase In Connections From UCP Pool After Swtiching The Service (Doc ID 2316558.1)

Last updated on JULY 22, 2019

Applies to:

JDBC - Version 11.2.0.4.0 to 12.2.0.0.0 [Release 11.2 to 12c]
Information in this document applies to any platform.

Symptoms

While using Application Continuity feature with UCP pool to connect to a RAC instance, a sudden increase in connections to

the database is noticed after switching the service with -f option. Also, connections are opened and closed frequently. 

Data source configuration is: 

Initial pool size =0
Min pool size=1
Max pool size= 3.

However, the issue does not occur with following settings:
Initial pool size =3
Min pool size=5
Max pool size= 20

OR

Initial pool size =0
Min pool size=5
Max pool size= 20.

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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