CICS Transaction Server Performance & Tuning

Virtual Classroom Environment dates - click to book!

UK Start Times

What do I need?

• webcam
• headphones with microphone
• sufficient bandwidth, at least 1.5 Mb/s in each direction.

What you will learn

On successful completion of this course you will be able to:

• explain how performance is affected by parameters and design concepts
• manipulate CICS facilities to optimize performance
• describe the impact of z/OS facilities on CICS performance
• explain the impact of network features on performance.

Who Should Attend

Systems Programmers.

Prerequisites

CICS systems programming experience.

Duration

4 days

Fee (per attendee)

£2550 (ex VAT)

This includes free online 24/7 access to course notes.

Hard copy course notes are available on request from rsmshop@rsm.co.uk

at £50.00 plus carriage per set.

Course Code

CPT

Contents

Introduction to CICS Performance

Performance objectives; Response times; Types of Waits; Resource load; Why tune?; Methodology; CICS and the applications; Measurement tools; Benchmarking tools; What resources to tune; Storage; CPU cycles; I/O reduction; Terminal I/O; Checklist for tuning; Making a change; Goal for tuning; Key CICS measurement statistics; Processor cycle (CPU) checklist; Virtual Storage checklist; Real Storage checklist; I/O tuning checklist.

z/OS interface

Resource hierarchy; Central storage; Auxiliary storage; Address space; Operating System; CICS private area; CICS region layout; Data spaces; Checking the z/OS storage; Coupling Facility; VSAM Record Level Sharing; Coupling Facility Data Tables; TS datasharing concepts; TCBs; OPENTCBS; CPU utilization; OPENAPI; Concurrency required; CICS & Real Storage; Other OS areas; Recommendations.

Dispatching

CICS dispatching; Double chains; CICS dispatching TCBS; Mode switching; Maximum Task (MXT); Recommendations; Statistics; Transaction Class (TCLASS); TRANCLASS; Task Priority & PRTYAGE (SIT); Transaction priority; Priority Age; Formula; Empiric evidence; Transaction Priority (PRTYAGE); Region exit interval ICV; Runaway task time ICVR; Multi-tasking; DTIMOUT; SIT parameters; Limit conditions; Other transaction definitions; Transaction Isolation; Dispatcher statistics; End of day statistics; Output from stat transaction; z/OS interface questions.

Storage Management

Problems with storage; 31-bit storage; System Queue Area And Extended SQA; Link Pack Area And Extended LP; z/OS Common Service Area; Private And Extended Private Area; 64-bit storage; MEMLIMIT; Region size; RMF; Common Storage; Common Areas; The CICS Private Area; High Private Area; LSQA; Scheduler Work Area; Subpool; z/OS Storage above the CICS region; z/OS Storage within the CICS region; CICS kernel storage; Kernel changes; DSAs CICS V5.1 onwards; DSA limits; DSA extent sizes; Fragmentation; DSA parameters; DFHSMUTL; PAM examples; Solutions to DSA problems; CICS JVM Execution Environment; CICS LE/370; New SIT parameters; CICS LE/370 CEEROPT; CLER transaction; Storage - questions.

Loader

Loader Domain; CICS program compression; The new philosophy; Target calculation; DFHRPL; Dynamic DFHRPL; OTE enhancements - threadsafe; Compression trace; Virtual Lookaside Facility (VLF); Library LookAside (LLA); SIT parameter LLACOPY; Loader statistics.

Network - VTAM & TCP/IP

Network performance; Network components; High Performance Option (HPO); RAPOOL; Statistics; RECEIVESIZE/SENDSIZE; IOAREALEN; MSGINTEG; ICV; SIT parameter; AUTOINSTALL; AUTOINSTALL statistics; Problems with shutdown; Data compression; Statistics; Unsolicited statistics; Accessing CICS from the web; CWS overview; Performance study; CWS RDO; TCPIPSERVICE definition; BACKLOG; IPADDRESS; TSQPREFIX; SSL(NO|YES|CLIENTAUTH); AUTHENTICATE(NO|BASIC|CERTIFICATE|AUTOREGISTER|AUTOMATIC); CWS Secure Sockets Layer; Web Support; Storage requirements; SSL enablement; SSL SIT parameters; SSLDELAY; MAXSSLTCBs; Full SSL handshake; Doctemplate; Channel & Containers; New ABEND codes; EXEC commands; CICS Web Support; Network review.

MRO/ISC/IPIC

A typical CICSPlex; MRO sessions; ISC sessions; System entries; Workload management; Generic resource names; MRO long running mirrors; MROBTCH; IPCONN.

VSAM

File structures; Alternate index; VSAM fundamentals; VSAM myths and legends; Changing environments; Obsolete parameters; VSAM KSDS; Free space; CI LOCK; Disk space utilization; VSAM LISTCAT; Important LISTCAT fields; Premature Control Area splits; Non Shared Resources (NSR); Default buffering; NSR index buffers; Eliminating Index; I/O; NSR index buffers calculation; NSR data buffers; Local Shared Resources; LSRPOOL; How many buffer pools?; Number of defined LSR pools; LSR VSAM Threadsafe file distribution; VSAM threadsafe; Data tables; User maintained; Shared data table; Performance benefits; SDT performance issues; VSAM RLS; RLSACCESS(NO|YES); Record Level Sharing (RLS); RLS restrictions; VSAM RLS I/O path; VSAM RLS sub-components; Buffer management; 31-bit and 64-bit buffer management; Performance issues; Contention issues; CICS & RLS performance; Coupling Facility Data Tables (CFDTs).

z/OS Logger

CICS SIT parameters; CICS V4 AKPFREQ considerations; Log Manager concepts; The z/OS System Logger; CICS Log Manager domain; The Coupling Facility; DASD-ONLY logging; Statistics available; CICS TS activity keypointing; Journal models; Coupling Facility example; DASD model example; Logger statistics; SMF 88 record fields.

Transient Data

Extrapartition; Intrapartition queues; Recovery serialization; Transient Data; Sample statistics; Buffers and strings.

Temporary Storage

API commands; Main vs Aux vs Coupling Facility; Auxiliary; TST replacement; TS Coupling Facility pool; TS list structures; Small queues vs large queues; TS server JCL; Statistics; Temporary Storage tuning area; TS MAIN vs. TS AUX; Server stats; Temporary statistics.

CICS - Db2 Interface

Defining Db2 connections with CEDA; CICS TS TCB allocation; How the dispatcher selects an L8/L9 TCB; Defining Db2 entries with CEDA; Example trace FORCEQR=YES; Example trace program concurrency(threadsafe); Threadsafe file control; Performance; Performance TCB; Threadsafe code; Threadsafe CICS commands; Load module summary report; Detail report; Example DFHEISUP; Accounting; Statistics; DSNC display statistics.

CICS - DBCTL

DBCTL; Database Resource Adapter; DBCTL TCB support; DBCTL virtual storage planning; Statistics; Open Transaction Environment (OTE) support.