Home

TEG Mainframe

CICS

Assembler

Tuning

Threadsafe

Experience

Contact Us

Downloads

References

 

Specializing in highly technical projects in the Mainframe environment

The implementation of threadsafe via the Open Transaction Environment marks a radical change in CICS capabilities. When first announced, threadsafe was implemented primarily for the significant CPU savings achievable with CICS/DB2 transactions (customers report up to 30% reduction in CPU for some CICS/DB2 applications.) Now, a second wave of threadsafe implementers are finding significant advantages in converting non-DB2 applications to threadsafe, including:
 

  • CPU constraint relief. Threadsafe allows CICS transactions to run on
    multiple processors, reducing QR TCB wait time.

  • Use of restricted options. Threadsafe allows full use of z/OS
    functionality, including macros that cause z/OS waits, or use z/OS storage.

  • Segregation of resource-intensive transactions. Threadsafe allows
    troublesome transaction to be run under their own TCB, freeing the QR
    for other transactions.

However, some customers are reporting transaction abends and significant increases in CPU if threadsafe is implemented incorrectly. The Evans Group, Inc. can supply expert assistance in reviewing, analyzing and converting your programs to be threadsafe compliant, and in training your programmers in threadsafe conversion techniques.

For more information, click here to download the award-winning presentation Russ gave at Share on converting CICS applications to threadsafe, or here for a copy of the updated presentation Russ gave on exploiting threadsafe without DB2. Russ has also written two articles on CICS and Threadsafe for Technical Support, the journal of NaSpa. Select CICS 2.2 and Threadsafe or Making Programs Threadsafe for a copy of the articles.

The Evans Group, Inc. provides a unique function - the ability to access expert knowledge and capabilities without making a long term commitment. By exploiting this service, your company can acquire the specialty skills you need as you need them, and at a reasonable cost. You determine which skills you require and for how long; we have the experience and flexibility to match your needs.

 

The Evans Group, Inc  207-293-4286  info@evansgroupconsulting.com
P. O. Box 323  Mount Vernon, Me 04352