Analyzing/Measuring/Monitoring Memory Usage ...
Analyzing/Measuring/Monitoring Memory
Usage & Understanding z/OS Memory
Management : Performance View
Z. Meral Temel
Garanti Technology
13 March 2012
10592
Agenda
Introduction ¨C AS Virtual /Real Memory Map ¨C CEC Memory Locations
Improvements In RSM/VSM/ASM Through z/OS v1R8 To Today
RSM/VSM/ASM Algorithms
UIC Calculation,Page Stealing,Logical Swapping
Types Of Memory Resources ¨C Advantages /Disadvantages
In Memory Areas
DataSpace
HiperSpace
Memory Objects
CICS & DB2 Virtual/Real Memory Map & Usage
DFSORT & DB2 Utilities Memory Resource Usage Hints & Tips
2
RMF Panels & SMF Records Used & Meanings
Agenda
Memory Resource Related SMF113 Records - TLBs and Others
Important Changes And Analyzing Their Effects
All Jobs Default Region Size Increase 32 MB To 64 MB
LPAR Memory Capacity Increase Effect
Finding Bottlenecks
List Of Important APARs
HW & SW Configuration Options Used
3
Who is GT ?
? A wholly-owned subsidiary of Garanti Bank, the second largest private bank in
Turkey owned by Do?u? Group and BBVA.
? One of the largest private internal IT service providers in Turkey
? Most up-to-date IT infrastructure
? Tightly integrated and fully in-house developed, custom-fit IT solutions
? Uninterrupted transaction capability and infrastructure security
? Well-reputed as a company of ¡°firsts¡±
? Visionary and continuous investment in technology since 90¡¯s
? Fast decision making and strong communication from top to down
? Centralized management reporting systems, enable management to take
timely actions
? Advanced CRM applications
? Paperless banking
GT- CICS Configuration ¨CTORs & AORs
Average daily trx : 205 million
Peak daily trx : 281,817,000 million
Internet
Call Centre
POS Merchants
130 CICS Regions
WAS
HTTP
POS
ATM
ECI/tcpip
VISA/EUROPAY
Branches
TORs
WEB Banking
TORs
POS Banking
D
B
2
TOR
ATM Banking
Listener
Switch
TORs
Branch Banking
SLA
Availability : % 99.999
Response : 0.045 sec.
5
5
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