This page provides a starting point for finding information about Java Transaction API (JTA) support. Applications running on the server can use transactions to coordinate multiple updates to resources as one unit of work, such that all or none of the updates are made permanent.
The product provides advanced transactional capabilities to help application developers avoid custom coding. It provides support for the many challenges related to integrating existing software assets with a Java EE environment.
If your application accesses CICS, you might in some cases want to consider tuning the log defer interval value.
WebSphere® Application Server for z/OS® uses global resource serialization (GRS) to communicate information between servers in a sysplex. When there are multiple servers defined in a system or a sysplex, a request might end up on the wrong server. WebSphere Application Server for z/OS uses GRS to determine where the transaction is running.