Explanation/Reference:
Maximum Connection Pool Size
When determining the maximum size of the database connection pool, consider the following issues:
The total number of connections that the WebSphere Commerce cluster can open to the database should not overwhelm your database.
References: http://www-01.ibm.com/support/docview.wss?uid=swg21358336

To take advantage of support for SSO between WebSphere Application Servers or between WebSphere Application Server and a Domino server, applications must meet the following prerequisites and conditions:
* Verify that all servers are configured as part of the same DNS domain.
* Etc.
Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/com.ibm.websphere.nd.doc/ae/ csec_sso.html

Unmanaged nodes cannot be synchronized.

Explanation/Reference: https://www.ibm.com/support/knowledgecenter/en/SSAW57_9.0.0/ com.ibm.websphere.nd.multiplatform.doc/ae/rdyn_cachespec.html

Explanation/Reference:
Delete the plugin-cfg.xml file in the profile_root/config/cells directory before you use the GenPluginCfg command. Otherwise, configuration changes do not persist to the plugin-cfg.xml file. However, do not delete the plugin-cfg.xml file if you have custom properties that you previously set in it that you need to persist.
Note: You can update the global plugin-cfg.xml file using the administrative console or running the GenPluginCfg command for all of the clusters in a cell. However, you must delete the config/cells/plugin- cfg.xml file before you update the global plugin-cfg.xml file. If you do not delete the config/cells/plugin- cfg.xml file, only the new properties and their values are added to the global plugin-cfg.xml file. Any updates to existing plug-in property values are not added to the global plugin-cfg.xml file.
References: https://www.ibm.com/support/knowledgecenter/en/SSAW57_8.5.5/ com.ibm.websphere.nd.doc/ae/rxml_genplugincfg1.html