AUDIENCE:   This course is designed for system programmers/analysts responsible for installation, support, debugging, or performance of a CICS system. Very experienced CICS application programmers wishing to gain knowledge on efficient use of CICS facilities will also benefit from this course. PREREQUISITES:   Before taking this course, you should have experience installing, tailoring, or maintaining a CICS (any release) system. If you are in the process of migrating to CICS TS, prior experience with CICS in an earlier version satisfies this prerequisite. DURATION:   4 days. Hands on. OBJECTIVES:   This course covers the performance aspects of a CICS TS system and how to measure and tune the system to meet performance objectives. The course material is reinforced with classroom examples and review of students' systems. After completion of this course, you should be able to: - Describe the elements of performance analysis and resource management - Understand methods used to measure and tune a CICS system. - List resources used and managed by CICS and demonstrate methods used to minimise resource consumption. - Obtain information about CICS resource utilisation. - Describe CICS TS storage, task, file, and network management and how to monitor these functions. - List performance considerations of the CICS DB2 and CICS DL/1 interfaces. - Identify resource contention and proper use of tuning parameters to control contention. - Understand performance considerations for interconnected CICS systems. COURSE CONTENT:   Setting performance objectives Data gathering for performance objectives Performance monitoring Determining acceptable trade-offs Performance measurement of CICS Statistics CICS Monitoring Facility (CMF) CICS Trace facility Other CICS data Service Level Reporter (SLR) Generalised Trace Facility (GTF) and Reports Resource Measurement Facility (RMF) Third-party products Performance measurement of related products ACF/VTAM ACF/NCP VSAM, IMS, DB2 Collection, reporting and interpretation of CICS Statistics Statistics from: Auto-install, DBCTL session termination, Dispatcher, DL/1, Domain manager, Dump, Dynamic transaction backout, File and LSR Pool, IRC batch, ISC/IRC, Journal Monitoring, Program, Domain, Storage Manager, Table manager, Task control and transaction class, Temporary storage, Terminal, Transient data, VTAM statistics - batch and on-line statistics processing Use of the CICS Monitoring Facility (CFM) Monitoring classes Performance class Exception class SYSEVENT class use with SLR The Monitoring Control Table (MCT) Controlling monitoring Monitoring output processing Use of CICS Trace Facility Controlling Trace Trace destinations Collecting and reporting trace data Interpretation of trace entries as they relate to performance Identifying CICS Constraints Response times Storage stress Program Loading Paging problems Storage violation Limit Conditions Hardware Constraints Software constraints Resource Contention DASD Communications network Real and Virtual Storage Processor cycles Effects of constraints on CICS logic Operating System Tuning Reducing MVS CSA requirements Making CICS non-swappable Storage Isolation Setting corrects CICS region size CICS dispatching priority and performance groups Using job initiators Region exit interval (ICV) Use of LLA (MVS/ESA library lookaside) Use of VLF (MVS/ESA virtual lookaside facility) DASD tuning Minimizing use of cycles Major Elements of MVS and CICS Virtual Storage MVS Storage Areas CICS use of private area storage The CICS dynamic storage areas CICS kernel storage CICS nucleus storage. Tuning Virtual and Real Storage Correct specifications and monitoring of CICS dynamic storage areas CICS DSA (CDSA) User DSA (UDSA) Extended CICS DSA (ECDSA) Extended User DSA (EUDSA) Extended Read-Only DSA (ERDSA) The storage cushions Maximum task specifications (MXT) Maximum active task specifications (AMXT) Maximum task class specifications (CMXT) Task prioritisation Resident, non-resident and transient programmes Putting application programmes above the 16MB line Splitting systems Limiting the expansion subpool 229 Dynamic log buffer size (DBUFSZ) Minimising and eliminating programme compressions. Terminal Control Tuning Terminal input/output area (TYPETERM IOAREALEN or TCT TIOAL) Receive-any input areas (RAMAX) Receive-any pool (RAPOOL) High Performance option (HPO) with VTAM SNA transaction flows (MSGINTEG, PROTECT and ONEWTE) SNA chaining (TYPETERM, RECEIVESIZE, BUILDCHAIN and SENDSIZE) Number of concurrent logon/logoff requests (OPNDLIM) Terminal scan delay (ICVTSD) Negative poll delay (NPDELAY) Compression of output terminal data streams Automatic installation of terminals VSAM and File Control Tuning VSAM resource sharing (LSRPOOL) Reducing buffer contention VSAM buffer allocations VSAM string settings Maximum keylength for LSR (KEYLEN) Resource percentile for LSR (RSCLMT) Hyperspace buffers VSAM subtasking Data tables Shared Data Tables. CICS - DL/1 Tuning DBCTL minimum threads (MINTHRD) DBCTL maximum threads (MAXTHRD) DBTCL DEDB parameters (CNBA, FPBUF, FPBOF) DL/1 threads (DLTHRED) IMS Storage Pools (PSBPL, DMBPL, ENQPL) CICS shared database facility. CICS - DB2 Tuning Resource Control Table parameters (THRDMAX, THRDM, THRDA, DPMODE) Thread creation and termination Thread reuse. Journaling Tuning Activity keypoint frequency (AKPFREQ) Journaling options (BUFSIZE, SYSWAIT) Journal volume switches (JOUROPT) MRO and ISC Tuning CICS Intercommunication Facilities Terminal input/output area (SESSIONS IOAREALEN) for MRO Sessions Proper balance of SEND/RECEIVE sessions or Contention Winner/Loser sessions Batching requests (MROBTCH) Extending the life of mirror transaction (MROLRM) Application Programming considerations BMS map suffixing and the device-dependent suffix option Restricted Language options COBOL RESIDENT option PL/1 shared library COBOL 11 Tuning CICS Services and Facilities CICS Temporary Storage · Main temporary storage · Auxiliary temporary storage · Secondary extents for emporary storage · Multiple buffers · Concurrent input/output operations · Control interval (CI) sizes) CICS Transient data · Multiple VSAM buffers · Multiple VSAM strings · logical recovery · logging activity · secondary extents for intrapartition · transient data CICS Monitoring Facility CICS Trace (minimizing overhead) Program Loading. Improving CICS Initialisation and termination times and recovery/restart tuning.