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© 2008 IBM Corporation
Understanding and MonitoringParallel SysplexPerformance
Speaker Name: Glenn Anderson, IBM Training
TrademarksThe following are trademarks of the International Business Machines Corporation in the United States, other countries, or both.
The following are trademarks or registered trademarks of other companies.
* All other products may be trademarks or registered trademarks of their respective companies.
Notes:Performance is in Internal Throughput Rate (ITR) ratio based on measurements and projections using standard IBM benchmarks in a controlled environment. The actual throughput that any user will experience will varydepending upon considerations such as the amount of multiprogramming in the user's job stream, the I/O configuration, the storage configuration, and the workload processed. Therefore, no assurance can be given that anindividual user will achieve throughput improvements equivalent to the performance ratios stated here.IBM hardware products are manufactured from new parts, or new and serviceable used parts. Regardless, our warranty terms apply.
All customer examples cited or described in this presentation are presented as illustrations of the manner in which some customers have used IBM products and the results they may have achieved. Actual environmental costsand performance characteristics will vary depending on individual customer configurations and conditions.This publication was produced in the United States. IBM may not offer the products, services or features discussed in this document in other countries, and the information may be subject to change without notice. Consult yourlocal IBM business contact for information on the product or services available in your area.
All statements regarding IBM's future direction and intent are subject to change or withdrawal without notice, and represent goals and objectives only.Information about non-IBM products is obtained from the manufacturers of those products or their published announcements. IBM has not tested those products and cannot confirm the performance, compatibility, or any otherclaims related to non-IBM products. Questions on the capabilities of non-IBM products should be addressed to the suppliers of those products.Prices subject to change without notice. Contact your IBM representative or Business Partner for the most current pricing in your geography.
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SoftwareCoupling Facility Control Code
z/OS and subsystemsXCF
XES
Architecture
Structures (Lock, List andCache)
Commands
Hardware
Coupling Facility
CPs (shared , dedicated)
Links
high speed linksStorage Size
Coupl ing Technology
CF
What about the Sysplex Components inPerformance ?
LOCKS DATA
BUFFERSLOCKSDATA
BUFFERS
MVS Sysplex
Services
Coupling
Technology
REQUESTS REQUESTS
Multi-Systems
- serialization
-
modifieddata
MVS
S/390
MVS
S/390
MicrosecondsMicroseconds
Milliseconds
NanosecondsNanoseconds
DATABASE
MANAGERS
DATABASE
MANAGERS
Caches
Lock Bits
Global Buffer Directory
Parallel Sysplex Environment
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Coupling Facility Technology
Shared ICF
DELTED_NAMEsupport
Initial CF
HW andFunctions
Cache Vector indexComparison
Enhancement
Dynamic Alter CICS TSQSystem Logger
Level 0
Level 1
List KEY andList cursor
Enhancements
Level 1
Register Name List andBatch Unlock
Level 2
Level 2
StructureEnhancements
(255/Structure &1023 Structure/CF)
Level 2
IMS SharedMessage Queue
Base
Level 3
DB2 CACHEDuplexingDynamic ICFExpansion
Level 5Level 6
Level 7
Level 9
List StructureEnhancementsMulti-SystemEnclaves
Dynamic CF
DispatchICF Support
Level 4
IC ChannelICBTPF support
Level 8
Dynamic ICFExpansion intoshared ICFsSystem ManagedRebuild
Level 10 - z900
Level 11 - SM Duplexing
Level 12 - z990 64-bit CFCC AddressibilityLevel 13 - DB2 castout enhancementsLevel 14 - CFCC
Dispatcher RestructureLevel 15 - Increasing tasks RMF data
enhancements
Tuner's View of the Coupling Facility
3 different types of structure
LIST (and "Serialized List")
LOCK
CACHE
Each exploiter has a different implementation
Beware of general concepts like "good or bad"
Use the performance data provided by the 'exploiter
Make a general review of workloads and rates
Are the CF accesses equivalent?
Are the "service times" equivalent?
Are there any indicators of delay of type links or subchannels?
What are the CPU indicators?
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CF Request Types
Synchronous immediate
Lock type accessSynchronous non-immediate
Cache type access (transfers of data <4K*)
Asynchronous
Cache type access (transfers of data >4K *)
CF Request Types...
Synchronous immediate
Delay Time and Service time are included in CPU busy time
Synchronous non-immediate
Service time included in CPU busy time (if not converted)
Can be converted to Asynch request
can be queued on a subchannel if no subchannel available
Asynchronous
Can be queued on a subchannel if no subchannel available orredriven if no path available
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CFCECLink
Path
z/OS
z/OS
Software (z/OS, XES)
Subchannels
Link Buffers
Link
Path
2
1
CPs
Elements of the CF Model
Compat Mode - 2 buffers per link
Peer Mode - 7 buffers per link
CF: Measurements Basic
z/OS CF
CP
a
bc Service Time
DelayTime
Link/Pathd
Async
Sync
Subchannel
SUBCHANNEL ACTIVITY
-------------------------------------------------------------------------------------
----------- REQUESTS ----------- ------------------ DELAYED REQUESTS --------------
# -SERVICE TIME(MIC)- # % OF ------ AVG TIME(MIC) ------
REQ AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
SYNC 247394 38.7 22.3 LIST/CACHE 13 0.0 15.4 6.5 0.0
ASYNC 688869 145.6 392.5 LOCK 0 0.0 0.0 0.0 0.0
CHANGED 6 INCLUDED IN ASYNC TOTAL 13 0.0
UNSUCC 0 0.0 0.0
ab -d
c
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CF Partition Options - What are theDifferences?
Standalone CF
dedicated processor(s)
best for productionshared processor(s)
test or non-data-sharing production
dynamic CF dispatching
competition from other partitions
ICF (Internal Coupling Facility)
dedicated or shared processor(s)
see above
optional shared processor(s) expansionavailability considerations
addressed by CF duplexing
Internal Coupling Facility (ICF)
CFz/OS z/OS z/OS
PR/SMIC
z/OS Spare CPs can be used as CF CPs
CF CPs ONLY run Coupling Facility Microcode
CF MIPS excluded from software costs
Can run as IC Channel or accessed via CouplingLinks
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System Managed CF Structure Duplexing
z/OS receives CF exploiter's update request and splits it into two distinct requests, onedestined for each of two structures
Two CF's stay in synch by signal exchange over a CF to CF coupling link
Return command responses to z/OS system merged into a single consolidated response
Works for either synch or asynch and is transparent to exploiter
1.Request in
7.Response out
XESExploiter
z/OS
2a.Split req out
2b.Split req out
6a. Response6b. Response
4.Update 4.Update
CF01 CF02
3a+b. "Ready to start"
5a+b. "Ready to end"
(split/merge)
------------------------------------------------------------------------------------------------------
COUPLING FACILITY NAME = CF2
------------------------------------------------------------------------------------------------------ STRUCTURE NAME = DSNDB1G_LOCK1 TYPE = LOCK STATUS = ACTIVE PRIMARY
# REQ -------------- REQUESTS ------------- ------------- DELAYED REQUESTS -----------
SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF --- AVG TIME(MIC) ---
NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 179K SYNC 163K 91.5 108.5 137.6 NO SCH 0 0.0 0.0 0.0 0.0
99.28 ASYNC 15K 8.5 483.9 474.0 PR WT 0 0.0 0.0 0.0 0.0CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 47K 26.1 24.4 99.5 6.4
------------------------------------------------------------------------------------------------------
COUPLING FACILITY NAME = CF3
------------------------------------------------------------------------------------------------------
STRUCTURE NAME = DSNDB1G_LOCK1 TYPE = LOCK STATUS = ACTIVE SECONDARY
# REQ -------------- REQUESTS ------------- ------------ DELAYED REQUESTS ------------
SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF --- AVG TIME(MIC)----
NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 177K SYNC 162K 91.4 103.8 147.8 NO SCH 0 0.0 0.0 0.0 0.0
98.52 ASYNC 15K 8.6 473.6 464.9 PR WT 177K 100 5.4 15.7 5.4
CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 131K 73.7 15.1 56.2 11.1
SUBCH
SUBCH
RSV SEND
PR WT SEND
PR CMPCF2
CF3
Queue time Service time
RMF- DB2 Lock, all requests duplexed
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Performance Issues for Duplexing
z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS
------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF1 ------------------------------------------------------------------------------------------------------------------------------ CF TO CF ACTIVITY ------------------------------------------------------------------------------------------------------------------------------ # REQ ----------- REQUESTS ----------- -------------- DELAYED REQUESTS -------------- PEER TOTAL -- CF LINKS -- # -SERVICE TIME(MIC)- # % OF ------ AVG TIME(MIC) ------ CF AVG/SEC TYPE USE REQ AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
CF2 18424K CBP 1 SYNC 18424K 14.3 4.2 SYNC 0 0.0 0.0 0.0 0.0 20471 CFP 3
CF3 5531K CFP 6 SYNC 5531K 15.4 4.0 SYNC 0 0.0 0.0 0.0 0.0 6145.2
System-managed duplexing performance issues:Cost to initiate and receive messages will increase for writes
Response time for updates will increase
CF utilization and link utilization will go up
Remember, you are gated by the slowest resource
Some estimates on the cost of duplexing
RMF provides a separate report on CF to CF link activity
Costs Storage z/OS CPU CF Links (time) CF CPU
User Managed (DB2 GBPs) 2x 2x 2x 2x
System Managed (Lock) 2x 4x 5x 8x
System Managed (List) 2x 3x 4x 6x
Estimate of amount of structure activity to be duplexed:Cache: 1% to 100% (typically 20%), Lock: 100%, List: near 100%
CF Coupling Link Performance
9672R64 to C04
2064114 to 1xx
20843xx to 3xx
2094109 to 2xx
SYNC 100 - 175 15 - 30 10 -25 7-20
ASYNC 500 - 1500 150 - 450 100-350 80-300
Range to account for amount of data being transferred
Low end - no data (ex. GRSLOCK)
High end - largest data transfer allowed ( SYNC - 4K, ASYNC - 64K)
Assumes fastest CF link technology available on that processor and a
well-tuned sysplex
What is the best possible response to expect
Optimization hints for managing CF linksMake sure you have enough, at least 2 per CPC to each CF
If using EMIF sharing, keep subchannel BUSY COUNTS < 10%
Check CF RMF reports for indicators of path busy conditions that canshow the necessity to add more
CFR links are reconfigurable on CFs C04/C05 and higher
Only one partition allowed in candidate list
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RMF Coupling Technology Support
Historical (Postprocessor)
Based on RMF SMF Data
Provides information for capacity planning and performanceanalysis
Supports:Coupling Facilities
Cross-System Coupling Facility (XCF)
Inter System Channel Activity
Real-Time (Monitor III)
Provides information for problem determination andperformance assurance
Who uses and/or is delayed for a parallel sysplex component
Supports:Coupling Facilities
XCF
CF: Postprocessor Report Content
CP CP...
RMF CF Report:CF=AA
Processor Summary
Storage Summary
Structure Summary
Structure Activity Section
Requests Rates
Service & Delay Times
Lock Contention
Cache Statistics
Usage Summary
Subchannel Activity SectionRequests Rates
Service & Delay Times
Path/Subchannel Busy
CF=AA
SYS1
SYS2
Channel Path Activity Report
IS Link Utilization
Shows information necessary tounderstand the utilization andexploitation of the CF !
Summary information gives anoverview,
Structure information goes into detail
Subchannel Activity shows CF usagesummarized by each system
Complemented by Channel Path
Activity Reports from each system
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Coupling Facility Usage Report (1)
C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 1 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS
------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 TOTAL SAMPLES(AVG) = 897 (MAX) = 899 (MIN) = 893 ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY USAGE SUMMARY ------------------------------------------------------------------------------------------------------------------------------ STRUCTURE SUMMARY
------------------------------------------------------------------------------------------------------------------------------
% OF % OF % OF AVG LST/DIR DATA LOCK DIR REC/ STRUCTURE ALLOC CF # ALL CF REQ/ ENTRIES ELEMENTS ENTRIES DIR REC TYPE NAME STATUS CHG SIZE STOR REQ REQ UTIL SEC TOT/CUR TOT/CUR TOT/CUR XI'S
LIST DSNDB1G_SCA ACTIVE 40M 0.7 27542 0.1 N/A 30.60 12K 108K N/A N/A PRIM 216 1906 N/A N/A IXCPLEX_PATH2 ACTIVE 47M 0.8 14915K 47.1 N/A 16572 10K 10K N/A N/A 1 37 N/A N/A
LIST CSLRMGR_PROD ACTIVE 25M 0.4 52357 0.2 N/A 58.17 54K 10K 256 N/A PRIM 16K 3590 0 N/A ISTGENERIC ACTIVE 9M 0.1 40945 0.1 N/A 45.49 26K 547 4 N/A PRIM 11K 34 0 N/A SYSARC_DFHSM_RCL ACTIVE 5M 0.1 1490 0.0 N/A 1.66 5005 4973 16 N/A PRIM 364 352 0 N/A
LOCK DSNDB1G_LOCK1 ACTIVE 73M 1.2 1642K 5.2 N/A 1824.8 128K 0 8389K N/A PRIM 6137 0 1877 N/A DSNDB2G_LOCK1 ACTIVE 17M 0.3 0 0.0 N/A 0.00 42K 0 2097K N/A SEC 0 0 0 N/A
CACHE DSNDB1G_GBP0 ACTIVE 29M 0.5 2944 0.0 N/A 3.27 64K 1491 N/A 0 PRIM 14K 1107 N/A 0 SYSIGGCAS_ECS ACTIVE 1M 0.0 608798 1.9 N/A 676.44 142 134 N/A 0 48 48 N/A 0 SYSZWLM_B52A2084 ACTIVE 20M 0.3 101298 0.3 N/A 112.55 3831 7657 N/A 0 PRIM 289 699 N/A 0 SYSZWLM_WORKUNIT ACTIVE 20M 0.3 0 0.0 N/A 0.00 3831 7662 N/A 0 SEC 0 0 N/A 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------- ------ ------- ----- ------ ------- STRUCTURE TOTALS 3G 46.4 31643K 100 N/A 35159
Coupling Facility Usage Report (2)
1 C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 5 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS
------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 TOTAL SAMPLES(AVG) = 897 (MAX) = 899 (MIN) = 893 ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY USAGE SUMMARY ------------------------------------------------------------------------------------------------------------------------------ STORAGE SUMMARY ------------------------------------------------------------------------------------------------------------------------------
ALLOC % OF CF ------- DUMP SPACE ------- SIZE STORAGE % IN USE MAX % REQUESTED
TOTAL CF STORAGE USED BY STRUCTURES 2820M 46.4 TOTAL CF DUMP STORAGE 879M 14.5 0.0 0.5 TOTAL CF STORAGE AVAILABLE 2378M 39.1 ------- TOTAL CF STORAGE SIZE 6077M
ALLOC % ALLOCATED SIZE
TOTAL CONTROL STORAGE DEFINED 6077M 60.9 TOTAL DATA STORAGE DEFINED 0K 0.0
PROCESSOR SUMMARY ------------------------------------------------------------------------------------------------------------------------------
COUPLING FACILITY 2094 MODEL S38 CFLEVEL 14
AVERAGE CF UTILIZATION (% BUSY) 31.8 LOGICAL PROCESSORS: DEFINED 3 EFFECTIVE 3.0
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Coupling Facility List Structure Report 1
1 C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 37 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY STRUCTURE ACTIVITY ------------------------------------------------------------------------------------------------------------------------------
STRUCTURE NAME = DSNDB1G_SCA TYPE = LIST STATUS = ACTIVE PRIMARY # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) ----- NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 5295 SYNC 1334 4.8 64.9 37.8 NO SCH 0 0.0 0.0 0.0 0.0 5.88 ASYNC 3961 14.4 222.2 1728.2 PR WT 2588 48.9 7.2 73.5 3.5 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 1290 24.4 39.4 269.2 9.6 DUMP 0 0.0 0.0 0.0 0.0
JB0 7334 SYNC 2635 9.6 62.2 36.0 NO SCH 0 0.0 0.0 0.0 0.0 8.15 ASYNC 4699 17.1 196.5 523.7 PR WT 3637 49.6 5.4 13.8 2.7 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 1845 25.2 30.4 190.3 7.6 DUMP 0 0.0 0.0 0.0 0.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 27542 SYNC 11K 39.8 50.6 32.8 NO SCH 2 0.0 4966 6908 0.4 30.60 ASYNC 17K 60.2 220.4 912.7 PR WT 13K 48.8 5.0 33.3 2.4 CHNGD 3 0.0 PR CMP 6401 23.2 38.4 590.6 8.9 DUMP 0 0.0 0.0 0.0 0.0
STRUCTURE NAME = IXCPLEX_PATH2 TYPE = LIST STATUS = ACTIVE # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) ----- NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 2223K SYNC 0 0.0 0.0 0.0 NO SCH 10 0.0 622.3 356.2 0.0 2470 ASYNC 2223K 14.9 113.6 487.5 PR WT 0 0.0 0.0 0.0 0.0 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 0 0.0 0.0 0.0 0.0 DUMP 0 0.0 0.0 0.0 0.0
JB0 2679K SYNC 0 0.0 0.0 0.0 NO SCH 294 0.0 524.6 1150 0.1 2977 ASYNC 2679K 18.0 99.5 356.4 PR WT 0 0.0 0.0 0.0 0.0 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 0 0.0 0.0 0.0 0.0 DUMP 0 0.0 0.0 0.0 0.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 14915K SYNC 0 0.0 0.0 0.0 NO SCH 950 0.0 264.7 775.8 0.0 16572 ASYNC 15M 100 103.8 378.4 PR WT 0 0.0 0.0 0.0 0.0 CHNGD 0 0.0 PR CMP 0 0.0 0.0 0.0 0.0 DUMP 0 0.0 0.0 0.0 0.0
1 C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 37 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY STRUCTURE ACTIVITY ------------------------------------------------------------------------------------------------------------------------------
STRUCTURE NAME = DSNDB1G_LOCK1 TYPE = LOCK STATUS = ACTIVE PRIMARY # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) ----- EXTERNAL REQUEST NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL CONTENTIONS
JA0 661K SYNC 630K 38.3 66.3 30.8 NO SCH 1 0.0 35.0 0.0 0.0 REQ TOTAL 722K 735.0 ASYNC 32K 1.9 203.1 512.5 PR WT 661K 100 4.6 20.4 4.6 REQ DEFERRED 1717 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 478K 72.3 8.7 84.7 6.3 -CONT 1461 -FALSE CONT 150
JB0 913K SYNC 903K 55.0 65.9 31.3 NO SCH 34 0.0 61.5 183.0 0.0 REQ TOTAL 948K 1015 ASYNC 10K 0.6 225.0 520.3 PR WT 913K 100 4.1 19.3 4.1 REQ DEFERRED 3704 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 670K 73.3 8.1 49.1 5.9 -CONT 2141 -FALSE CONT 311 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 1642K SYNC 1587K 96.6 66.1 31.0 NO SCH 37 0.0 58.5 175.5 0.0 REQ TOTAL 1760K 1825 ASYNC 55K 3.4 202.6 467.4 PR WT 1642K 100 4.3 19.6 4.3 REQ DEFERRED 8646 CHNGD 0 0.0 PR CMP 1199K 73.0 8.4 66.5 6.2 -CONT 6792 -FALSE CONT 543
STRUCTURE NAME = IRLMLOCK1 TYPE = LOCK STATUS = ACTIVE PRIMARY # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) ----- EXTERNAL REQUEST NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL CONTENTIONS
JA0 198K SYNC 189K 7.4 69.3 34.1 NO SCH 2 0.0 18.5 16.3 0.0 REQ TOTAL 222K 220.4 ASYNC 8905 0.3 279.2 517.0 PR WT 197K 99.2 5.0 22.5 5.0 REQ DEFERRED 1065 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 148K 74.4 9.7 85.2 7.2 -CONT 1054 -FALSE CONT 619
JB0 558K SYNC 513K 20.0 70.6 32.7 NO SCH 70 0.0 32.0 15.1 0.0 REQ TOTAL 652K 619.8 ASYNC 45K 1.8 225.7 369.5 PR WT 555K 99.5 4.6 17.3 4.6 REQ DEFERRED 3808 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 413K 74.1 9.5 61.0 7.0 -CONT 3689 -FALSE CONT 1447 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 2560K SYNC 1753K 68.5 65.5 32.4 NO SCH 119 0.0 29.0 16.9 0.0 REQ TOTAL 2879K 2844 ASYNC 807K 31.5 146.1 218.5 PR WT 2552K 100 3.6 11.9 3.5 REQ DEFERRED 31K CHNGD 0 0.0 PR CMP 1857K 72.6 18.2 149.9 13.2 -CONT 17K -FALSE CONT 9137
Coupling Facility Lock Structure Report
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1 C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 37 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY STRUCTURE ACTIVITY ------------------------------------------------------------------------------------------------------------------------------
STRUCTURE NAME = DSNDB1G_GBP0 TYPE = CACHE STATUS = ACTIVE PRIMARY # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) -----
NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 430 SYNC 426 14.5 29.3 18.8 NO SCH 0 0.0 0.0 0.0 0.0 0.48 ASYNC 4 0.1 251.0 106.9 PR WT 0 0.0 0.0 0.0 0.0 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 0 0.0 0.0 0.0 0.0 DUMP 0 0.0 0.0 0.0 0.0
JB0 803 SYNC 757 25.7 38.5 23.5 NO SCH 0 0.0 0.0 0.0 0.0 0.89 ASYNC 46 1.6 213.5 103.4 PR WT 0 0.0 0.0 0.0 0.0 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 0 0.0 0.0 0.0 0.0 DUMP 0 0.0 0.0 0.0 0.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 2944 SYNC 2876 97.7 25.8 18.2 NO SCH 0 0.0 0.0 0.0 0.0 -- DATA ACCESS --- 3.27 ASYNC 68 2.3 203.9 101.1 PR WT 0 0.0 0.0 0.0 0.0 READS 164 CHNGD 0 0.0 PR CMP 0 0.0 0.0 0.0 0.0 WRITES 928 DUMP 0 0.0 0.0 0.0 0.0 CASTOUTS 295 XI'S 258 STRUCTURE NAME = SYSZWLM_B52A2084 TYPE = CACHE STATUS = ACTIVE PRIMARY # REQ -------------- REQUESTS ------------- -------------- DELAYED REQUESTS ------------- SYSTEM TOTAL # % OF -SERV TIME(MIC)- REASON # % OF ---- AVG TIME(MIC) ----- NAME AVG/SEC REQ ALL AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 25817 SYNC 155 0.2 88.8 64.9 NO SCH 8 0.0 169.9 44.9 0.1 28.69 ASYNC 26K 25.3 157.0 471.8 PR WT 13K 49.8 5.7 16.3 2.9 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 7118 27.6 86.7 348.1 23.9 DUMP 0 0.0 0.0 0.0 0.0
JB0 24976 SYNC 273 0.3 96.4 67.8 NO SCH 62 0.2 146.9 164.0 0.4 27.75 ASYNC 25K 24.4 157.9 627.8 PR WT 12K 49.9 5.0 6.2 2.5 CHNGD 0 0.0 INCLUDED IN ASYNC PR CMP 6917 27.7 73.3 251.6 20.3 DUMP 0 0.0 0.0 0.0 0.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ------------------------------------------------------------------------------------------------------------------------------ TOTAL 101K SYNC 692 0.7 96.7 69.5 NO SCH 126 0.1 562.1 3045 0.7 -- DATA ACCESS --- 112.6 ASYNC 101K 99.3 149.4 696.4 PR WT 50K 49.9 5.1 10.0 2.5 READS 50857 CHNGD 1 0.0 PR CMP 28K 27.2 68.4 682.2 18.6 WRITES 50181 DUMP 0 0.0 0.0 0.0 0.0 CASTOUTS 0 XI'S 0
Coupling Facility Cache Structure Report
1 C O U P L I N G F A C I L I T Y A C T I V I T Y PAGE 125 z/OS V1R8 SYSPLEX UTCPLXJ8 DATE 07/24/2006 INTERVAL 015.00.000 CONVERTED TO z/OS V1R8 RMF TIME 11.30.00 CYCLE 01.000 SECONDS ------------------------------------------------------------------------------------------------------------------------------ COUPLING FACILITY NAME = CF2 ------------------------------------------------------------------------------------------------------------------------------ SUBCHANNEL ACTIVITY ------------------------------------------------------------------------------------------------------------------------------ # REQ ----------- REQUESTS ----------- ------------------ DELAYED REQUESTS -------------- SYSTEM TOTAL -- CF LINKS -- PTH # -SERVICE TIME(MIC)- # % OF ------ AVG TIME(MIC) ------ NAME AVG/SEC TYPE GEN USE BUSY REQ AVG STD_DEV REQ REQ /DEL STD_DEV /ALL
JA0 6102K CBP 1 1 2964 SYNC 2877K 46.9 35.7 LIST/CACHE 46 0.0 578.2 477.0 0.0 6780.6 CFP 3 3 ASYNC 3198K 135.6 516.6 LOCK 12 0.0 25.0 17.1 0.0 SUBCH 28 28 CHANGED 8 INCLUDED IN ASYNC TOTAL 58 0.0 UNSUCC 0 0.0 0.0 JB0 5862K CBP 1 1 4311 SYNC 1806K 64.9 35.1 LIST/CACHE 1219 0.0 631.9 2385 0.2 6513.4 CFP 3 3 ASYNC 4025K 132.0 415.0 LOCK 111 0.0 40.5 102.0 0.0 SUBCH 28 28 CHANGED 494 INCLUDED IN ASYNC TOTAL 1330 0.0 UNSUCC 0 0.0 0.0 JC0 3603K CBP 1 1 5303 SYNC 704564 61.9 38.4 LIST/CACHE 1202 0.0 1076 6567 0.4 4002.9 CFP 3 3 ASYNC 2870K 147.4 585.0 LOCK 62 0.0 41.2 100.3 0.0 SUBCH 28 28 CHANGED 523 INCLUDED IN ASYNC TOTAL 1264 0.0 UNSUCC 0 0.0 0.0 JE0 2486K CBP 1 1 1530 SYNC 521887 56.7 40.5 LIST/CACHE 115 0.0 255.8 521.1 0.0 2761.9 CFP 3 3 ASYNC 1910K 157.0 351.1 LOCK 2 0.0 10.5 3.5 0.0 SUBCH 28 28 CHANGED 80 INCLUDED IN ASYNC TOTAL 117 0.0 UNSUCC 0 0.0 0.0 JF0 4206K ICP 8 8 0 SYNC 137625 18.6 50.9 LIST/CACHE 1183 0.0 43.5 96.8 0.0 4673.8 SUBCH 56 56 ASYNC 3937K 120.3 253.2 LOCK 0 0.0 0.0 0.0 0.0 CHANGED 594 INCLUDED IN ASYNC TOTAL 1183 0.0 UNSUCC 0 0.0 0.0 JH0 1857K CBP 1 1 0 SYNC 127855 16.7 48.5 LIST/CACHE 438 0.0 275.4 416.6 0.1 2063.8 CFP 2 2 ASYNC 1704K 121.9 247.9 LOCK 2 0.0 13.0 1.4 0.0 SUBCH 21 21 CHANGED 8 INCLUDED IN ASYNC TOTAL 440 0.0 UNSUCC 0 0.0 0.0 J80 4537K ICP 8 8 0 SYNC 1679K 33.7 34.5 LIST/CACHE 7 0.0 409.6 280.7 0.0 5041.0 SUBCH 56 56 ASYNC 2850K 104.8 215.5 LOCK 6 0.0 12.8 7.9 0.0 CHANGED 1 INCLUDED IN ASYNC TOTAL 13 0.0 UNSUCC 0 0.0 0.0 J90 1820K CBP 3 3 0 SYNC 545768 69.0 22.5 LIST/CACHE 0 0.0 0.0 0.0 0.0 2022.0 CFP 4 4 ASYNC 1270K 148.9 842.9 LOCK 0 0.0 0.0 0.0 0.0 SUBCH 49 49 CHANGED 0 INCLUDED IN ASYNC TOTAL 0 0.0 UNSUCC 0 0.0 0.0
Subchannel Activity
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CF: How to Read the Reports
1. Check CF Service Times and Delay Times
Examine Service TimesBy System, By Structure
Examine Delay Times
If Service Times seem too high2. Check Path and Subchannel Busy
Cross check with Link Utilization in Channel Path Activity Report
3. Check CF Utilization
4. Structure details:
Lock Structures - Lock Contention
Cache Structures - Read/Write Statistics
List Structures - List Elements used at end of interval
5. More information:
XCF:see RMF XCF Report
GRS: see RMF XCF and Enqueue Reports
Postprocessor
DurationReport
OverviewReport
andRecord
RMF CF Online Monitoring
Monitor III Real-Time
CFSYS
CP...CF=AA
SYS1
SYS2
CP
CF=BB
CFACT
CFOVER
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CF Overview Report: CFOVER
ERB3CFO RMF V1R8 CF Overview - UTCPLXHD Line 1 of 10
Command ===> Scroll ===> PAGE
Samples: 120 Systems: 3 Date: 07/24/06 Time: 11.30.00 Range: 100 Sec
---- Coupling Facility ----- ---- Processor ----- Request -- Storage --
Name Type Model Level Util% Defined Effect Rate Size Avail
CF1 2096 S07 14 24.6 4 3.8 27107.1 6077M 2500M
CF2 2094 S38 14 31.8 3 3.0 35159.4 6077M 2378M
CF3 2064 212 13 28.4 4 4.0 15887.1 6078M 3408M
CF Systems Report: CFSYS
RMF V1R8 CF Systems - UTCPLXJ8
Samples: 120 Systems: 14 Date: 07/24/06 Time: 10.18.00 Range: 120 Sec
CF Name System Subch -- Paths -- -- Sync --- ------- Async -------
Delay Avail Delay Rate Avg Rate Avg Chng Del
% % Serv Serv % %
CF1 JA0 0.0 6 2.7 185.4 64 3145 200 0.0 0.2
JB0 0.0 4 22.3 42.8 68 1007 187 0.1 5.5
JC0 0.0 4 36.9
JE0 0.0 6 1.6
JF0 0.0 6 3.2
JG0 0.0 3 1.5
JH0 0.0 3 2.6
J80 0.0 2 0.0
J90 0.0 6 1.4
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ERB3CFS RMF V1R8 CF Systems - UTCPLXJ8 Line1 of 6
Command ===> Scroll ===> CSR
Samples: 120 Systems: 14 Date: 07/24/06 Time: 10.18.00 Range: 120 Sec
CF Name System Subch -- Paths -- -- Sync --- ------- Async -------
Delay Avail Delay Rate Avg Rate Avg Chng Del
% % Serv Serv % %
CF1 SYS1 5.2 8 1.2 5.5 2111 2.2 4333 2.1 5.4
SYS2 10.3 2 15.4 5.6 2333 2.3 4555 1.2 5.6
SYS3 1.1 2 0.1 5.5 2111 2.2 4333 3.0 5.4
SYS4 0.3 2 0.2 5.6 2333 2.3 4555 2.4 5.6
SYS5 4.8 2 1.2 5.6 2333 2.3 4555 0.0 5.6
SYS6 7.3 2 5.7 5.6 2333 2.3 4555 0.0 5.6
CF2 SYS1 0.5 8 0.5 5.5 2111 2.2 4333 1.0 5.4
SYS2 10.3 2 15.4 5.6 2333 2.3 4555 1.2 5.6
SYS3 1.1 2 0.1 5.5 2111 2.2 4333 3.0 5.4
SYS4 0.3 2 0.2 5.6 2333 2.3 4555 2.4 5.6
SYS5 4.8 2 1.2 5.6 2333 2.3 4555 0.0 5.6
SYS6 7.3 2 5.7 5.6 2333 2.3 4555 0.0 5.6
RMF Coupling Facility - Subchannels and Paths
Details for System : JAB0
Coupling Facility : CF1
Subchannels Generated : 14
In Use : 14
Max : 14
Path IDs : C0 80
Press Enter to return to the Report panel.
F1=Help F2=SplitScr F3=End F6=RMFHelp F9=SwapScr
F12=Return
CFSYS Details via Cursor Sensitivity
CF On-line Report Sample
ERB3CFS RMF V1R8 CF Systems - UTCPLXJ8 Line1 of 34
Command ===> Scroll ===> PAGE
Samples: 120 Systems: 14 Date: 07/24/06 Time: 10.18.00 Range: 120 Sec
CF: CF1 Type ST System --- Sync --- --------- Async --------
Rate Avg Rate Avg Chng Del
Structure Name Serv Serv % %
COUPLE_CKPT1 LIST *ALL 11.1 2222 5.5 4444 1.1 5.5
SYS1 5.5 2111 2.2 4333 1.3 5.4
SYS2 5.6 2333 2.3 4555 1.0 5.6
COUPLE_CKPT2 LIST *ALL 11.1 2222 5.5 4444 2.1 5.5
SYS3 5.5 2111 2.2 4333 2.0 5.4
SYS4 5.6 2333 2.3 4555 2.3 5.6
IRLMLOCK1 LOCK *ALL 11.1 2222 5.5 4444 3.0 5.5
SYS1 5.5 2111 2.2 4333 2.9 5.4
SYS2 5.6 2333 2.3 4555 3.1 5.6
DSNDB1G CACHE *ALL 3.2 1111 2.2 2222 0 1.2
SYS1 3.2 1111 2.2 2222 0 1.2
TESTCACHE CACHE A *ALL 0 0 0 0 0 0
SYS1 0 0 0 0 0 0
RMF CF Activity - Structure Details
Details for structure IRLMLOCK1 in coupling facility CF1
Press Enter to return to the Report panel.
LOCK information for system JAB0
Structure Size : 20M Connection Name: IRLMLOCKP00C0001
List Entries Total : 4096 Jobname : IRLM
Current : 256 Status : Active
Lock Entries Total : 4096 ASID : 109
Current : 256 CF Level : 2
Contention (%) : 80
False Contention (%) : 20
IRLMLOCK1
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What's it Cost Me?
Host CPU effect
Varies based on
Portion of workload involved in data sharing Access rate to shared data
Type of hardware for Host, CF and CF links
Number of systems
Typical system-level effects
Resource Sharing: 3% versus single image
Data sharing primary production application: 5% to 10%
Individual Transaction/Job effects - can have widevariation
Do I Need to Add More Coupling Links?
Each CF link has 2 (7 in peer mode) hardware buffers
z/OS assigns a subchannel to each buffer
XES must obtain a subchannel to start a CF operation
If all subchannels are busy ...
Lock - XES spins (SYNC DELAYED REQUEST)
Sync cache/list - XES changes to async (CHANGED)
Async cache/list - XES queues (ASYNC DELAYED REQ)
Warning sign: >10% TOTAL DELAYED REQUESTS
Investigate cause of delaysSubchannel utilization >30% - add or upgrade links
Not directly reported by RMF but easily calculated
Exploiter issues burst of CF ops
XCF message size negotiation - create new structure
DB2 GBP castout - tune frequency and/or castout ownership
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XCF Path Statistics Report
TOTAL SAMPLES = 30 XCF PATH STATISTICS
-------------------------------------------------------------------------------------------------------------------------------
OUTBOUND FROM SYS5 INBOUND TO SYS5
--------------------------------------------------------------------------------- ------------------------------------------
T FROM/TO T FROM/TO
TO Y DEVICE, OR TRANSPORT REQ AVG Q FROM Y DEVICE, OR REQ BUFFERS
SYSTEM P STRUCTURE CLASS OUT LNGTH AVAIL BUSY RETRY SYSTEM P STRUCTURE IN UNAVAIL
SYS1 S IXCSIG1 DEFLT4K 25 0.00 25 0 0 SYS1 S IXCSIG1 31 0 S IXCSIG2 DEFAULT 718 0.00 718 0 0 S IXCSIG2 2,946 0
S IXCSIG3 DEFLARG 1 0.00 1 0 0 S IXCSIG3 16 0
S IXCSIG4 DEFLT12K 204 0.00 204 0 0 S IXCSIG4 198 0
S IXCSIG5 DEFAULT 1,316 0.00 1,316 0 0 S IXCSIG5 3,073 0 S IXCSIG6 DEFLT36K 176 0.00 176 0 0 S IXCSIG6 17 0
C 0B61 TO 0BA9 DEFAULT 552 0.00 552 0 0 C 0BA2 TO 0B6A 326 0
C 0160 TO 01A0 DEFAULT 617 0.00 617 0 0 C 0110 TO 01F0 299 0
SYS2 S IXCSIG1 DEFLT4K 1,728 0.00 1,728 0 0 SYS2 S IXCSIG1 522 0
S IXCSIG2 DEFAULT 1,439 0.00 1,439 0 0 S IXCSIG2 13,264 0 S IXCSIG3 DEFLARG 12 0.00 12 0 0 S IXCSIG3 14 0
S IXCSIG4 DEFLT12K 1,147 0.00 1,147 0 0 S IXCSIG4 895 0 S IXCSIG5 DEFAULT 2,209 0.00 2,209 0 0 S IXCSIG5 4,538 0
S IXCSIG6 DEFLT36K 188 0.00 188 0 0 S IXCSIG6 137 0
C 0B51 TO 0BA9 DEFAULT 934 0.00 934 0 0 C 0BA2 TO 0B5A 85 0
C 0150 TO 01A0 DEFAULT 423 0.00 423 0 0 C 0110 TO 01E0 21 0
SYS3 S IXCSIG1 DEFLT4K 2212920 0.07 2209656 3,264 0 SYS3 S IXCSIG1 749,787 0
S IXCSIG2 DEFAULT 2847630 0.23 2847614 16 0 S IXCSIG2 9142336 0
S IXCSIG3 DEFLARG 0 0.00 0 0 0 S IXCSIG3 15 0S IXCSIG4 DEFLT12K 730,206 0.10 730,025 181 0 S IXCSIG4 148,564 0
S IXCSIG5 DEFAULT 5123192 0.33 5123164 28 0 S IXCSIG5 35,150 0S IXCSIG6 DEFLT36K 1,991 0.00 1,991 0 0 S IXCSIG6 7,609 0
C 0B41 TO 0BA9 DEFAULT 73,416 0.03 73,408 8 0 C 0BA2 TO 0B4A 173,828 0
C 0140 TO 01A0 DEFAULT 76,525 0.00 76,516 9 0 C 0110 TO 01D0 170,868 0
---------- ----------
TOTAL 11,440,428 TOTAL 11,219,955
CF
StructuresCTCs
High values heremay indicate
insufficient paths
Values here mean therewas insufficient buffers
for input requests
Proportion of Traffic
DEFAULT = 78%
DEFLT4K = 13%
DEFLT12K = 4%
(remainder)= 5%
XCF Usage by System Report
% of big messages thatsuffered performance
degradation
XCF USAGE BY SYSTEM
REMOTE SYSTEMS LOCAL
OUTBOUND FROM SYS5 INBOUND TO SYS5 SYS5
----- BUFFER ----- ALL
TO TRANSPORT BUFFER REQ % % % % PATHS REQ FROM REQ REQ TRANSPORT REQ
SYSTEM CLASS LENGTH OUT SML FIT BIG OVR UNAVAIL REJECT SYSTEM IN REJECT CLASS REJECT
SYS1 DEFLT12K 12,220 204 94 6 0 0 0 0 SYS1 7,391 0 DEFLT12K 0
DEFLT36K 36,796 176 100 0 0 0 0 0 DEFLT36K 0
DEFLT4K 4,028 25 0 100 0 0 0 0 DEFLT4K 0
DEFLARG 62,464 1 0 100 0 0 0 0 DEFLARG 0
DEFAULT 956 5,405 0 100 0 0 0 0 DEFAULT 0
SYS2 DEFLARG 62,464 12 100 0 0 0 0 0 SYS2 19,039 0
DEFLT12K 12,220 1,147 98 2 0 0 0 0
DEFLT36K 36,796 188 100 0 0 0 0 0
DEFLT4K 4,028 1,728 0 100 0 0 0 0
DEFAULT 956 16,260 0 100 0 0 0 0SYS3 DEFLT4K 4,028 2212920 0 100 0 0 0 0 SYS3 11178K 0
DEFAULT 956 8456121 0 100 0 0 0 0
DEFLARG 62,464 0 0 0 0 0 0 0
DEFLT36K 36,796 1,991 100 0 0 0 0 0
interesting to knowhow much smallerbuffers could be
# of messages migratedbecause no signal paths
available
# of messages rejectedbecause no buffers
were available
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WLM Courses from IBM Education
Basic z/OS Tuning Using the Workload Manager(WLM)
ES5454.5 Days, Hands-on Lab Exercises
Advanced z/OS Performance: WLM, Sysplex,Unix Services, Web
ES851
4.5 Days
ibm.com/training