Operating system waits
You should avoid using facilities that cause operating system waits. All CICS® activity stops when one of these waits occurs, and all transactions suffer response delays.
The chief sources of operating system
waits are:
- Extrapartition transient data sets. (See Efficient sequential data set access .)
- Those COBOL, C, C++, and PL/I language facilities that you should not use in CICS programs and for which CICS generally provides alternative facilities. For guidance information about the language restrictions, see Developing COBOL applications , Developing C and C++ applications , and Developing PL/I applications.
- SVCs and assembler language macros that invoke operating system services, such as write-to-operator (WTO).