Published Release Notes

Required Oracle optimization parameter

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.

Split schema upgrade instructions missing properties

If you upgraded from 5.x, 6.x, or 7.x using the instructions in previous versions of the upgrade guide, you may have neglected to set the properties below in your migrateSystem.properties file when you migrated your upgraded schema to the source system:

pega.rules.objects.generate=true

pega.rules.objects.apply=true

If these properties were not set during an upgrade that splits the schema, your environment does not have the indexes, triggers, and primary keys on the rules tables.

To check for this issue, see if the pr4_base and pr4_rule rules tables in your existing rules schema are missing primary keys. If they are, use the SQL scripts in the ResourceKit\MigrationRecoveryScripts directory of the release to cleanup duplicate rules that were created due to this issue. Follow the steps below to run the scripts.

To run the scripts on Microsoft SQL, Oracle, or PostgreSLQ

1. Take down any app servers using the affected schema.
2. Backup your database.
3. Replace all instances of @RULES_SCHEMA in <database>_cleanDups.sql with the name of the schema that contains the pr4_base table.
4. Run the <database>_cleanDups.sql script on the database with vendor tools (sqlPlus, SQL Server Management Studio, etc).
5. Replace all instances of @RULES_SCHEMA in <database>_fix_vw_table.sql with the name of the schema that contains the pr4_base table.
6. Run the <database>_fix_vw_table.sql script on the database with vendor tools (sqlPlus, SQL Server Management Studio, etc).
7. Generate and apply the ddl using the command line generateDDL command. Check the installation guide for your database or the upgrade guide for details about how to use the generateDDL command line script.
8. Rebuild the indexes for the tables in your rules schema using vendor tools. This is necessary so that your system runs at an optimum speed.
9. Optionally upgrade to the latest release, at this point your database is ready to be upgraded or used depending on your needs.

To run the scripts on DB2 for LUW or z/OS

1. Take down any app servers using the affected schema.
2. Backup your database.
3. Run the <database>_cleanDups.sql script on the database with vendor tools (UDB CLP, Data Studio, etc) to create the CLEANSE_RULES_DUPS stored procedure.
4. Run the query Call CLEANSE_RULES_DUPS(‘<rulesSchema>’); where <rulesSchema> is the name of schema that contains the pr4_base table.
5. After the previous step is complete drop the CLEANSE_RULES_DUPS procedure.
6. Replace all instances of @RULES_SCHEMA in <database>_fix_vw_table.sql with the name of the schema that contains the pr4_base table.
7. Run the <database>_fix_vw_table.sql script on the database with vendor tools (UDB CLP, Data Studio, etc).
8. Generate and apply the ddl using the command line generateDDL command. Check the installation guide for your database or the upgrade guide for details about how to use the generateDDL command line script.
9. Rebuild the indexes for the tables in your rules schema using vendor tools. This is necessary so that your system runs at an optimum speed.
10. Optionally upgrade to the latest release. At this point your database is ready to be upgraded or used depending on your needs.

Synchronized database and application server settings

Configure your database and application server to use the same time zone and character encoding to avoid conflicts.

System Management

The PRPC installer has been enhanced to handle additional error conditions related to partial installs and duplicate keys; additionally, the hotfix rollback feature has been improved, and the Rulebase compare tool now supports HTTP(S) environments.

• Rollback feature has been enhanced.
• RuleBase Compare will work for secure (HTTPS) environments as well as  non-secure (HTTP) environments.
• Install will gracefully handle the presence of a duplicate key during import.
• When install fails, system will set tables back to original state.
• Remote MBean methods will now work on multi-servant load-balancing systems.
• Enhancements were made to harnesses in Split Schema systems.

Batch database processing improvements

Batch database processing has been enhanced to ensure that a constraint violation does not occur when you save transactions to a table with a foreign key dependency. Because batch processing changes the order of save operations, it is disabled for transactions with foreign key dependencies. Disabling batch processing ensures that a record with a foreign key dependency on another record will not be written before the record on which it is dependent.

For more information about how batch database processing works and how to enable and disable it, see Batch processing during database write operations.

Improve cluster security by limiting concurrent operator sessions

You can increase the security of a Pega^® Platform cluster by limiting the number of concurrent sessions allowed for each operator. Because operators typically do not require multiple concurrent sessions for performing their work, limiting the number of sessions reduces the chance that an unknown or untrusted person could access systems in the cluster. Use the new setting Number of concurrent sessions allowed for each operator on the Production tab of the System Data Instance form to configure the number of concurrent sessions for operators. You must restart your system when you change this setting. You can also create a list of operators by using the presence/maxsessions/operators/whitelist Dynamic System Setting, to which the maximum number of concurrent sessions setting will not apply.

For more information, see System form - Completing the Production tab.

New System Queue Management landing page

You can manage your system queues from the new System Queue Management landing page. You can use this landing page to quickly and efficiently debug applications without exiting Designer Studio. In addition to viewing items in a queue, you can defer, remove, and requeue items in a queue, stop items in progress, and view an item's XML.

As a result of this enhancement, the Broken Queue landing page has been removed.

For more information, see System Queue Management landing page.

Data encryption across search nodes

You can now encrypt communication among search nodes. Encryption secures the data that is transferred across nodes so that it cannot be accessed by unauthorized hosts. Encryption is enabled by default for new installations and upgrades from Pega^® 7.1.6 or earlier to Pega 7.3. Encryption is not enabled by default for upgrades from Pega 7.1.7 or later to Pega 7.3. You can enable and disable search encryption from the Search landing page or by using the indexing/distributed/enable_inter_node_encryption Dynamic System Setting.

For more information, see Enabling and disabling encryption for communication among search nodes.

Node classification

By using the node classification feature, which segregates nodes by their purpose, you can now configure one node with multiple node types. When you start a node with multiple node types, the node runs a set of agents and listeners that are associated with the specified node types. From the Node Classification landing page, you can view and configure the agents associated with node types, view listeners associated with node types, and open Agent rule forms, agent schedules, and Listener rule forms.

For more information, see Node Classification, Configuring node types for agents and listener and Node classification.

Support for Couchbase Server NoSQL database

Pega^® Platform can now read data from and write data to a Couchbase Server database. Couchbase is a NoSQL database that you can use when a NoSQL database better meets your scalability and processing requirements.

For a list of supported and unsupported features, see Couchbase Server support.