setting prepareThreshold to 0

[Dovid Bender]

Hi,

As per https://confluence.atlassian.com/crowd/crowd-3-1-upgrade-notes-935393894.html it says "We strongly recommend setting the prepareThreshold=0 parameter in the JDBC connection string for Crowd instances running with Postgres databases.".  Going through my logs I see:
apache-tomcat/logs/catalina.out:2019-05-19 11:05:54,489 localhost-startStop-1 INFO [crowd.manager.upgrade.UpgradeManagerImpl] Running upgrade task for build - 1002: Remove prepareThreshold=0 parameter from database connection url

Why would the setup remove it? Also I am not sure where it's set (what file) and the correct format. Any tips?

TIA.

Dovid