DB2 UDB for z/OS Version 8 Performance Topics - IBM Redbooks

More documents

Recommendations

Info

7.4.1 ODBC Unicode support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 7.4.2 ODBC long name support. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 7.4.3 ODBC connection authentication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 306 7.4.4 ODBC support for 2 MB SQL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 7.4.5 SQLcancel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 7.5 XML support in DB2 for z/OS V8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 7.5.1 XML extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307 7.5.2 XML publishing functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308 7.5.3 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 7.5.4 Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 7.6 Enterprise Workload Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 7.6.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 312 7.6.2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313 7.6.3 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316 Chapter 8. Data sharing enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319 8.1 CF request batching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 8.1.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 8.1.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 8.1.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 8.2 Locking protocol level 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325 8.2.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328 8.2.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331 8.2.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331 8.3 Change to IMMEDWRITE default BIND option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332 8.3.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332 8.3.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333 8.3.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333 8.4 DB2 I/O CI limit removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333 8.4.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333 8.4.2 Conclusion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335 8.4.3 Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335 8.5 Miscellaneous items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 8.5.1 Impact on coupling facility. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 8.5.2 Improved LPL recovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 8.5.3 Restart Light enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337 8.5.4 Change to close processing for pseudo close . . . . . . . . . . . . . . . . . . . . . . . . . . 338 8.5.5 Buffer pool long term page fixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 8.5.6 Batched index page splits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339 Chapter 9. Installation and migration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341 9.1 Unicode catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 9.1.1 Character conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 9.1.2 Unicode parsing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342 9.1.3 DB2 catalog changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344 9.2 IVP sample programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346 9.3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350 9.4 Migration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353 9.4.1 Migration plan recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354 9.4.2 Performance measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 355 9.5 Catalog consistency query DSNTESQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 359 Chapter 10. Performance tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363 10.1 DB2 Estimator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364 viii DB2 UDB for z/OS Version 8 Performance Topics
10.2 DB2 Performance Expert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364 10.3 Tivoli OMEGAMON XE for DB2 on z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 366 10.4 Tivoli OMEGAMON XE for DB2 Performance Expert on z/OS . . . . . . . . . . . . . . . . . 367 10.5 DB2 Archive Log Accelerator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367 10.6 DB2 Query Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 368 10.7 DB2 SQL Performance Analyzer for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 10.8 Data Encryption for IMS and DB2 Databases. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369 10.9 DB2 Data Archive Expert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 10.10 DB2 Bind Manager . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 10.11 DB2 High Performance Unload. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370 10.11.1 Performance measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 371 Appendix A. Summary of performance maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 377 A.1 Maintenance for DB2 V8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 378 A.2 Maintenance for DB2 V7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 386 A.3 Maintenance for z/OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390 Appendix B. The DBM1 storage map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393 B.1 DB2 PE Storage Statistics trace and report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 394 Appendix C. SQL PA sample reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 399 C.1 DB2 SQL PA additional reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400 Appendix D. EXPLAIN and its tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407 D.1 DB2 EXPLAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408 D.1.1 DSN_PLAN_TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409 D.1.2 DSN_STATEMNT_TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 415 D.1.3 DSN_FUNCTION_TABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416 D.1.4 DSN_STATEMNT_CACHE_TABLE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417 Abbreviations and acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423 Related publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425 IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425 Other publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426 Online resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 426 How to get IBM Redbooks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427 Help from IBM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 429 Contents ix
Page 1: ibm.com/redbooks Front cover DB2 UD
Page 4 and 5: Note: Before using this information
Page 6 and 7: 2.5.3 Increased number of deferred
Page 8 and 9: 4.5.2 Conclusion . . . . . . . . .
Page 12 and 13: x DB2 UDB for z/OS Version 8 Perfor
Page 14 and 15: 3-48 Consistency query - 31 New . .
Page 16 and 17: xiv DB2 UDB for z/OS Version 8 Perf
Page 18 and 19: 8-5 CF Request Batching - DB2 CPU .
Page 20 and 21: xviii DB2 UDB for z/OS Version 8 Pe
Page 22 and 23: Trademarks The following terms are
Page 24 and 25: Added information The following APA
Page 26 and 27: ► Added reference to June 15, 200
Page 28 and 29: Michael Parbs is a DB2 Specialist w
Page 30 and 31: Hugh Smith Jim Teng John Tobler Yoi
Page 32 and 33: xxx DB2 UDB for z/OS Version 8 Perf
Page 34 and 35: 1.1 Overview 1.1.1 Architecture IBM
Page 36 and 37: - Column data type changes can be d
Page 38 and 39: 1.1.3 Data warehouse 1.1.4 Performa
Page 40 and 41: Volatile (or cluster) tables, used
Page 42 and 43: In this chapter we anticipate the a
Page 44 and 45: 2.1.3 I/O time 2.1.4 Virtual storag
Page 46 and 47: ► The performance benchmarks for
Page 48 and 49: application that can have great pot
Page 50 and 51: Because you can significantly incre
Page 52 and 53: The possible increase in thread foo
Page 54 and 55: 2.5.9 Unicode parser Important: Con
Page 56 and 57: You can keep the DBRMs in EBCDIC fo
Page 58 and 59: Macro Parameter Old value New value
Page 60 and 61:
28 DB2 UDB for z/OS Version 8 Perfo
Page 62 and 63:
► Parallel sort enhancement Paral
Page 64 and 65:
Characteristics of the host variabl
Page 66 and 67:
3.1.4 Performance Update 10 rows us
Page 68 and 69:
► Complexity of the fetch. The fi
Page 70 and 71:
► More rows per one SQL statement
Page 72 and 73:
3.2.1 Creating MQTs MQTs compared t
Page 74 and 75:
Special register CURRENT REFRESH AG
Page 76 and 77:
the materialized query table. If it
Page 78 and 79:
Figure 3-9 MQTs and short running q
Page 80 and 81:
► The elapsed time is 22 times sm
Page 82 and 83:
Figure 3-13 Regrouping on MQT resul
Page 84 and 85:
EVE.EXT = 'ADD BILL' AND EVE.TXC =
Page 86 and 87:
Star Schema Figure 3-15 Star schema
Page 88 and 89:
merge joins and work file usage. DB
Page 90 and 91:
Star join access path without a spa
Page 92 and 93:
3.3.4 Performance Sparse index for
Page 94 and 95:
V8 Star Join Access Path Figure 3-2
Page 96 and 97:
3.3.5 Conclusion Star join workload
Page 98 and 99:
. SELECT * FROM PAOLO.TORDER WHERE
Page 100 and 101:
But not all mismatched numeric type
Page 102 and 103:
V8 shows that PL is joined with CV
Page 104 and 105:
Query performance problem Lack of m
Page 106 and 107:
3.5.1 Performance SORTDEVT SYSDA IN
Page 108 and 109:
3.5.2 Conclusions Figure 3-31 Acces
Page 110 and 111:
Mismatched data types SELECT COUNT(
Page 112 and 113:
3.7.1 Performance In V8 the paralle
Page 114 and 115:
3.7.2 Conclusions Example 3-9 Multi
Page 116 and 117:
3.8.2 Performance We show three exa
Page 118 and 119:
3.8.3 Conclusion The measurements s
Page 120 and 121:
100 Inserts activated trigger 100 t
Page 122 and 123:
3.10.2 Conclusion 100 Inserts activ
Page 124 and 125:
stores the selected columns from ea
Page 126 and 127:
While there is no optimistic lockin
Page 128 and 129:
FETCH FROM Figure 3-45 FETCH syntax
Page 130 and 131:
► Measurement data collected with
Page 132 and 133:
application has decidedly higher Cl
Page 134 and 135:
Static updatable cursor You can see
Page 136 and 137:
Multi-row FETCH with a static curso
Page 138 and 139:
3.12.5 Conclusion Multi-row FETCH a
Page 140 and 141:
While, for or SELECT ... FROM ...
Page 142 and 143:
3.14.2 Conclusion Percent reduction
Page 144 and 145:
3.15.1 Installation commands. Of co
Page 146 and 147:
Figure 3-47 Explain of the old cons
Page 148 and 149:
in ms = 1 and the CPU cost is 16 se
Page 150 and 151:
Figure 3-50 Suggested RUNSTATS stat
Page 152 and 153:
Looking at the explanation, we can
Page 154 and 155:
The Plug-In Options screen of Stati
Page 156 and 157:
Before the introduction of MQTs, DB
Page 158 and 159:
126 DB2 UDB for z/OS Version 8 Perf
Page 160 and 161:
► Larger VSAM CI sizes: DB2 V8 in
Page 162 and 163:
4.1.1 Performance support caused al
Page 164 and 165:
Regression is about 5% better than
Page 166 and 167:
The results indicate no significant
Page 168 and 169:
Important: 4.1.2 Conclusion If you
Page 170 and 171:
However, the combined impact of oth
Page 172 and 173:
Frees up space below the bar for ot
Page 174 and 175:
from the hiperpools, they were not
Page 176 and 177:
So, we advise you to not overalloca
Page 178 and 179:
See 4.3, “Monitoring DBM1 storage
Page 180 and 181:
Table 4-4 System storage configurat
Page 182 and 183:
Stack 11356 21033 85% 8648 19799 12
Page 184 and 185:
KB 600 500 400 300 200 100 0 Figure
Page 186 and 187:
For the same buffer pool size and o
Page 188 and 189:
4.2.3 Conclusion Nondistributed per
Page 190 and 191:
Important: With PTFs UK04394 (DB2 V
Page 192 and 193:
- DATASPACE BP CONTROL BLOCKS = 0 M
Page 194 and 195:
The EXTENDED REGION SIZE (MAX) is t
Page 196 and 197:
RDS OP POOL (MB) N/A RID POOL (MB)
Page 198 and 199:
As you can now appreciate, it is im
Page 200 and 201:
Megabytes A V7 Customer DBM1 Thread
Page 202 and 203:
4.5.1 Performance The most buffer p
Page 204 and 205:
4.6.1 Performance maintained in a 2
Page 206 and 207:
4.6.2 Conclusion We can conclude th
Page 208 and 209:
service for Unicode conversions, an
Page 210 and 211:
overcome this, when DB2 Connect is
Page 212 and 213:
INSERT HV1 1200 HV2 1200 SELECT HV1
Page 214 and 215:
AIX C-program Conversion Routines P
Page 216 and 217:
4.7.1 Performance The improvements
Page 218 and 219:
In October 2003, a new enhancement
Page 220 and 221:
UseServerEncoding data source prope
Page 222 and 223:
4.8.1 Performance 4.8.2 Conclusion
Page 224 and 225:
Multilevel security with row-level
Page 226 and 227:
► The security level that defines
Page 228 and 229:
DB2 must call RACF for this dominan
Page 230 and 231:
4.9.2 Conclusion The CPU increase c
Page 232 and 233:
4.10.1 Performance VSAM does not kn
Page 234 and 235:
4.10.2 Conclusion 4.10.3 Striping A
Page 236 and 237:
5 4 3 2 1 0 9109TLLB 4 Parallel DB2
Page 238 and 239:
--------------------------- -------
Page 240 and 241:
This message is completed with the
Page 242 and 243:
This enhancement is introduced by P
Page 244 and 245:
This record is activated by: -START
Page 246 and 247:
an online transaction with very sim
Page 248 and 249:
Page 250 and 251:
5.1 System level point-in-time reco
Page 252 and 253:
BACKUP SYSTEM During backup DB2 rec
Page 254 and 255:
Figure 5-1 FRBACKUP PREPARE elapsed
Page 256 and 257:
Figure 5-4 BACKUP SYSTEM FULL measu
Page 258 and 259:
5.1.2 Conclusion The BACKUP SYSTEM
Page 260 and 261:
Figure 5-7 shows the sliding scale
Page 262 and 263:
Maybe you have implemented a space
Page 264 and 265:
For dynamically prepared queries, D
Page 266 and 267:
► CHAR(8) to VARCHAR(8) ► CHAR(
Page 268 and 269:
Before ALTER INDEX add column, a ta
Page 270 and 271:
30 25 20 15 10 Figure 5-12 FETCH CP
Page 272 and 273:
Percent of index pages Avg. Index L
Page 274 and 275:
300 250 200 time in seconds 150 100
Page 276 and 277:
REORG REBALANCE We executed and mea
Page 278 and 279:
5.4 Volatile table 5.4.1 Conclusion
Page 280 and 281:
If explicit clustering for a table
Page 282 and 283:
Load table of 20M rows, 10 partitio
Page 284 and 285:
Times in seconds 20 18 16 14 12 10
Page 286 and 287:
RUNSTATS INDEX PARTITION of a DPSI
Page 288 and 289:
Note that when the qualified partit
Page 290 and 291:
► “NO” - Values in such colum
Page 292 and 293:
5.6.10 Support for more than 245 se
Page 294 and 295:
6.1 Online CHECK INDEX Online CHECK
Page 296 and 297:
SORTOUT DD UNIT=SYSDA,SPACE=(CYL,(5
Page 298 and 299:
- SORT 6 indexes in parallel - CHEC
Page 300 and 301:
make DB2 take the maximum paralleli
Page 302 and 303:
6.3 LOAD and UNLOAD delimited input
Page 304 and 305:
6.3.2 Conclusion We measured the CP
Page 306 and 307:
Options for cardinality and distrib
Page 308 and 309:
► Number of column groups: 1 ►
Page 310 and 311:
cases is the total time of RUNSTATS
Page 312 and 313:
6.4.5 Conclusion Statistics Advisor
Page 314 and 315:
goals for end-user services. We sho
Page 316 and 317:
alanced across all members. With th
Page 318 and 319:
method. Prior to DB2 V8 those array
Page 320 and 321:
when compared to DB2 V7. At the ser
Page 322 and 323:
7.2.2 Performance - Distributed cli
Page 324 and 325:
Recommendation If you currently do
Page 326 and 327:
► The DB2 Universal JDBC type 4 D
Page 328 and 329:
WebSphere z/OS - DB2 z/OS V8 - Serv
Page 330 and 331:
DB2 Universal Type 4 Driver - JDBC
Page 332 and 333:
Use DB2 Connect when a high amount
Page 334 and 335:
JCC Type 4 Direct 4:3 Concentration
Page 336 and 337:
The SYSIBM.INDOUBT table and the pa
Page 338 and 339:
Batch updates A batched update is a
Page 340 and 341:
Example In DB2 V8 SQL/XML publishin
Page 342 and 343:
INSERT INTO PUB_TAB(DOC) SELECT XML
Page 344 and 345:
7.5.3 Conclusion The new XML publis
Page 346 and 347:
A second role of the managed server
Page 348 and 349:
7.6.3 Performance The following inf
Page 350 and 351:
Page 352 and 353:
Impact on coupling facility: You do
Page 354 and 355:
Table 8-1 shows extracts from DB2 P
Page 356 and 357:
and secondary GBP structures have t
Page 358 and 359:
DB2 member already has the table sp
Page 360 and 361:
8.2.1 Performance We ran a number o
Page 362 and 363:
esolve any contention. This extra a
Page 364 and 365:
There is also no need to use RELEAS
Page 366 and 367:
Table 8-12 DB2 I/O CI Limit Removal
Page 368 and 369:
8.5 Miscellaneous items In this sec
Page 370 and 371:
DB2 V8 improves Restart Light. If i
Page 372 and 373:
Page 374 and 375:
9.1 Unicode catalog DB2 for z/OS su
Page 376 and 377:
that all applications are converted
Page 378 and 379:
- CLASST: Specifies the threshold a
Page 380 and 381:
From these measurements we observe
Page 382 and 383:
Class 1 CPU time (MSEC) 200 150 100
Page 384 and 385:
dynamic statement cache. If activat
Page 386 and 387:
that everything is ready. This step
Page 388 and 389:
Table Number of rows SYSDATABASE 75
Page 390 and 391:
In Figure 9-7 we describe the perfo
Page 392 and 393:
Old - Query 5 New - Query 5 CPU (se
Page 394 and 395:
Query 35 36 Old DSNTESQ CPU 1 hr 1
Page 396 and 397:
10.1 DB2 Estimator DB2 Estimator V8
Page 398 and 399:
- REAL AND AUXILIARY STORAGE This i
Page 400 and 401:
Another use is during back out of a
Page 402 and 403:
In DB2, the IBM Data Encryption too
Page 404 and 405:
The utilities ran on a G7 Turbo wit
Page 406 and 407:
time Figure 10-1 DB2 HPU vs. UNLOAD
Page 408 and 409:
DSNTIAUL with multi-row fetch The r
Page 410 and 411:
A.1 Maintenance for DB2 V8 The APAR
Page 412 and 413:
APAR # Area Text PTF and Notes PQ88
Page 414 and 415:
Page 416 and 417:
APAR # Area Text PTF and Notes PK21
Page 418 and 419:
Page 420 and 421:
Page 422 and 423:
Page 424 and 425:
Page 426 and 427:
B.1 DB2 PE Storage Statistics trace
Page 428 and 429:
Storage heading Description 24 BIT
Page 430 and 431:
Page 432 and 433:
C.1 DB2 SQL PA additional reports N
Page 434 and 435:
|is the last matching predicate. Ap
Page 436 and 437:
|ANL6052I *** NOTE: | |This index i
Page 438 and 439:
PREDICATE ANALYSIS ----------------
Page 440 and 441:
D.1 DB2 EXPLAIN EXPLAIN describes t
Page 442 and 443:
Table D-2 PLAN_TABLE contents and b
Page 444 and 445:
Column Type Content SORTC_ORDER BY
Page 446 and 447:
Column Type Content OPTHINT CHAR(8)
Page 448 and 449:
D.1.3 DSN_FUNCTION_TABLE You can us
Page 450 and 451:
Example: D-1 Creating DSN_STATEMENT
Page 452 and 453:
Column Type Content BIND_QUALIFIER
Page 454 and 455:
Page 456 and 457:
ICF integrated catalog facility ICF
Page 458 and 459:
► DB2 UDB for z/OS V8: Through th
Page 460 and 461:
Page 462 and 463:
character set 174 CHECK DATA 262 CH
Page 464 and 465:
Equi-join predicates 54, 402 Equiva
Page 466 and 467:
MINSTOR 145-146 Mismatched data typ
Page 468 and 469:
PQ84160 378, 387 PQ85764 387 PQ8584
Page 470 and 471:
Sort tree nodes 144 SORTDATA 268 SO
Page 472 and 473:
306 Universal Driver for SQLJ and J
Page 474 and 475:
Page 476:
DB2 UDB for z/OS Version 8 Performa
show all

DB2 UDB for z/OS Version 8 Performance Topics - IBM Redbooks

Create successful ePaper yourself

Delete template?

Save as template?