To optimize performance, set the Oracle parameter optimizer_index_cost_adj to a value between 20 and 25. If this value is not set, the system can run exceedingly slowly, potentially blocking users from login.
Synchronized database and application server settings
Valid from Pega Version 7.1.3
Configure your database and application server to use the same time zone and character encoding to avoid conflicts.
Twitter data sets no longer supported
Valid from Pega Version 7.1.9
Twitter is deprecating several APIs, which will disrupt the Twitter data set functionality. Twitter data sets will not be able to fetch any tweets or direct messages. This issue affects all applications that use Twitter data sets to connect to social (mainly Pega Customer Service applications).
This change applies to the current and earlier releases of Pega Platform™ that make use of Twitter data sets and it impacts all environments, including Pixar, VM, and Pega Labs instances.
Twitter connectors will be fully functional at a later date. For now, the best practice is to de-emphasize social media in your data sets.
All Pega product release notes can be found on their product pages.