When considering the development of multithreaded and/or multicontexted applications, examine the following aspects of your development and run-time environments:

• Do you have an experienced team of programmers capable of writing and debugging multithreaded and multicontexted programs that successfully manage concurrency and synchronization?
• Are the multithreading features of the Oracle Tuxedo system supported on the platform on which you are developing your application? These features are supported only on platforms with an OS-provided threads package, providing an appropriate level of functionality.
• Do the resource managers (RMs) used by your servers support multithreading? If so, consider the following issues, as well:
  • Do you need to set any parameters required by your RM to enable multithreaded access by your servers? For example, if you use an Oracle database with a multithreaded application, you must set the THREADS=true parameter as part of the OPENINFO string passed to Oracle. By doing so, you make it possible for individual threads to operate as separate Oracle associations.
  • Does your RM support a mixed mode of operation? A mixed-mode operation is a form of access such that multiple threads in a process can map to one RM association while other threads in the same process simultaneously map to different RM associations. Within one process, for example, Threads A and B map to RM Association X, while Thread C maps to RM Association Y.

  Not all RMs support mixed-mode operation. Some require all threads in a given process to map to the same RM association. If you are designing an application that will make use of transactional RM access within application-created threads, make sure your RM supports mixed-mode operation.