Expert Oracle Exadata - Parent Directory

More documents

Recommendations

Info

CHAPTER 2 OFFLOADING / SMART SCANSQL_ID CHILD OFFLOAD EXECS ELIGIBLE_BYTES SQL_TEXT------------- ------ ------- ----- -------------- --------------------05cq2hb1r37tr 0 Yes 1 38797312 select avg(pk_col) f1 row selected.Elapsed: 00:00:00.01SYS@SANDBOX1> alter session set "_serial_direct_read"=false;Session altered.Elapsed: 00:00:00.00SYS@SANDBOX1> -- execution 2SYS@SANDBOX1> select avg(pk_col) from kso.skew a where col1 > 0;AVG(PK_COL)-----------16093748.81 row selected.Elapsed: 00:00:04.71SYS@SANDBOX1> @fsx3Enter value for sql_text: %skew%Enter value for sql_id:SQL_ID CHILD OFFLOAD EXECS ELIGIBLE_BYTES SQL_TEXT------------- ------ ------- ----- -------------- --------------------05cq2hb1r37tr 0 Yes 2 38797312 select avg(pk_col) f1 row selected.Elapsed: 00:00:00.01SYS@SANDBOX1>SYS@SANDBOX1> alter session set "_serial_direct_read"=true;Session altered.Elapsed: 00:00:00.01SYS@SANDBOX1> -- execution 3SYS@SANDBOX1> select avg(pk_col) from kso.skew a where col1 > 0;AVG(PK_COL)-----------16093748.81 row selected.Elapsed: 00:00:03.54SYS@SANDBOX1> @fsx3Enter value for sql_text: %skew%Enter value for sql_id:57
CHAPTER 2 OFFLOADING / SMART SCANSQL_ID CHILD OFFLOAD EXECS ELIGIBLE_BYTES SQL_TEXT------------- ------ ------- ----- -------------- --------------------05cq2hb1r37tr 0 Yes 3 58195968 select avg(pk_col) f1 row selected.Elapsed: 00:00:00.01In this example we used the _SERIAL_DIRECT_READ parameter to disable Smart Scans. This parameterdoes not invalidate cursors, so the same cursor was used for all three executions of the statement. If youlook at the second execution, you can probably guess that it didn’t use a Smart Scan, as it was slowerthan the previous execution. You can verify that assumption by noting that the Eligible Byte Count didnot increase. However, the fsx script simply checks to see if the value of theIO_CELL_OFFLOAD_ELIGIBLE_BYTES column is greater than 0. As you can see, the value of the columnremained the same between executions causing the fsx script to report that the statement wasoffloaded, even though the second execution was not offloaded. So keep in mind that our indicator is acumulative value for all the executions of this cursor. Note that in the previous example we set up arather unusual situation where a single cursor is offloaded on one execution and not on another. Thisrarely happens in real life.The technique demonstrated by the fsx script provides a very useful alternative to tracing or usingsession statistics to verify whether Smart Scans are being performed. The biggest advantage is that youdon’t have to try to catch Smart Scan in real time. The IO_CELL_OFFLOAD_ELIGIBLE_BYTES column is storedin V$SQL and related views, which means it’s also captured by AWR. This provides us with a historicalview into how statements have been processed in the past. It is one of the main tools that we use for aquick-and-dirty verification of whether a Smart Scan has been used or not.SQL MonitoringThere is one other tool that is very useful for determining whether a SQL statement was Offloaded. TheREPORT_SQL_MONITOR procedure is part of the new Real Time SQL Monitoring functionality that wasadded with 11g. It is built into the DBMS_SQLTUNE package and provides a great deal of information, notonly on whether a statement was offloaded, but also on which steps in a plan were offloaded. Here’s anexample (first of a statement that was not offloaded and then of the same statement when it wasoffloaded):SYS@SANDBOX1> alter session set cell_offload_processing=false;Session altered.SYS@SANDBOX1> set echo offSYS@SANDBOX1> @avgskew3AVG(PK_COL)-----------16093750.2SYS@SANDBOX1> @fsx4Enter value for sql_text: %skew3%Enter value for sql_id:58
Page 2 and 3:
For your convenience Apress has pla
Page 5 and 6:
IntroductionThank you for purchasin
Page 7:
INTRODUCTIONwere implementing Exada
Page 12 and 13:
CHAPTER 1 WHAT IS EXADATA?end of t
Page 14 and 15:
CHAPTER 1 WHAT IS EXADATA? Kevin S
Page 16 and 17: CHAPTER 1 WHAT IS EXADATA?Limited
Page 18 and 19: CHAPTER 1 WHAT IS EXADATA? Note: H
Page 20 and 21: CHAPTER 1 WHAT IS EXADATA?StorageS
Page 22 and 23: CHAPTER 1 WHAT IS EXADATA?Adapters
Page 24 and 25: CHAPTER 1 WHAT IS EXADATA? Kevin S
Page 26 and 27: CHAPTER 1 WHAT IS EXADATA?Notice t
Page 28 and 29: CHAPTER 1 WHAT IS EXADATA?Software
Page 30 and 31: CHAPTER 1 WHAT IS EXADATA?Single I
Page 32 and 33: C H A P T E R 2Offloading / Smart S
Page 34 and 35: CHAPTER 2 OFFLOADING / SMART SCANR
Page 36 and 37: CHAPTER 2 OFFLOADING / SMART SCAN3
Page 38 and 39: CHAPTER 2 OFFLOADING / SMART SCANm
Page 40 and 41: CHAPTER 2 OFFLOADING / SMART SCANo
Page 42 and 43: CHAPTER 2 OFFLOADING / SMART SCANS
Page 46 and 47: CHAPTER 2 OFFLOADING / SMART SCAN|
Page 48 and 49: CHAPTER 2 OFFLOADING / SMART SCANX
Page 50 and 51: CHAPTER 2 OFFLOADING / SMART SCANC
Page 54 and 55: CHAPTER 2 OFFLOADING / SMART SCANe
Page 56 and 57: CHAPTER 2 OFFLOADING / SMART SCANa
Page 58 and 59: CHAPTER 2 OFFLOADING / SMART SCANs
Page 64 and 65: CHAPTER 2 OFFLOADING / SMART SCAN-
Page 70 and 71: CHAPTER 2 OFFLOADING / SMART SCANF
Page 72 and 73: CHAPTER 2 OFFLOADING / SMART SCAN_
Page 74 and 75: C H A P T E R 3Hybrid Columnar Comp
Page 76 and 77: CHAPTER 3 HYBRID COLUMNAR COMPRESS
Page 114 and 115: C H A P T E R 4Storage IndexesStora
Page 116 and 117:
CHAPTER 4 STORAGE INDEXESMonitorin
Page 118 and 119:
CHAPTER 4 STORAGE INDEXESVersion:
Page 120 and 121:
CHAPTER 4 STORAGE INDEXES• For e
Page 122 and 123:
CHAPTER 4 STORAGE INDEXES• _cell
Page 124 and 125:
CHAPTER 4 STORAGE INDEXESSYS@EXDB1
Page 126 and 127:
CHAPTER 4 STORAGE INDEXESpositives
Page 128 and 129:
CHAPTER 4 STORAGE INDEXESIncorrect
Page 130 and 131:
CHAPTER 4 STORAGE INDEXES---------
Page 132 and 133:
CHAPTER 4 STORAGE INDEXES1 row sel
Page 134 and 135:
C H A P T E R 5Exadata Smart Flash
Page 136 and 137:
CHAPTER 5 EXADATA SMART FLASH CACH
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
C H A P T E R 6Exadata Parallel Ope
Page 154 and 155:
CHAPTER 6 MAKING PCBSParameter Def
Page 156 and 157:
CHAPTER 6 MAKING PCBSTable 6-2. Hi
Page 158 and 159:
CHAPTER 6 MAKING PCBSSo as you can
Page 160 and 161:
CHAPTER 6 MAKING PCBS-- switch to
Page 162 and 163:
CHAPTER 6 MAKING PCBSThe Old WayBe
Page 164 and 165:
CHAPTER 6 MAKING PCBS642 05cq2hb1r
Page 166 and 167:
CHAPTER 6 MAKING PCBS((4 × CPU_co
Page 168 and 169:
CHAPTER 6 MAKING PCBSSYS@EXDB1> /S
Page 170 and 171:
CHAPTER 6 MAKING PCBSSYS@EXDB1> @q
Page 172 and 173:
CHAPTER 6 MAKING PCBSControlDescri
Page 174 and 175:
CHAPTER 6 MAKING PCBSthe normal ca
Page 176 and 177:
CHAPTER 6 MAKING PCBSEnter value f
Page 178 and 179:
CHAPTER 6 MAKING PCBSphysical read
Page 180 and 181:
CHAPTER 6 MAKING PCBStransaction t
Page 182 and 183:
CHAPTER 6 MAKING PCBSSYS@EXDB1> se
Page 184 and 185:
CHAPTER 7 RESOURCE MANAGEMENTimpor
Page 186 and 187:
CHAPTER 7 RESOURCE MANAGEMENTSQL>
Page 188 and 189:
CHAPTER 7 RESOURCE MANAGEMENTSessi
Page 190 and 191:
CHAPTER 7 RESOURCE MANAGEMENTrelat
Page 192 and 193:
CHAPTER 7 RESOURCE MANAGEMENTResou
Page 194 and 195:
CHAPTER 7 RESOURCE MANAGEMENTdbms_
Page 196 and 197:
CHAPTER 7 RESOURCE MANAGEMENTcomme
Page 198 and 199:
CHAPTER 7 RESOURCE MANAGEMENTBEGIN
Page 200 and 201:
CHAPTER 7 RESOURCE MANAGEMENT[enkd
Page 202 and 203:
CHAPTER 7 RESOURCE MANAGEMENTStep
Page 204 and 205:
CHAPTER 7 RESOURCE MANAGEMENT Tip:
Page 206 and 207:
CHAPTER 7 RESOURCE MANAGEMENTAccor
Page 208 and 209:
CHAPTER 7 RESOURCE MANAGEMENTNow,
Page 210 and 211:
CHAPTER 7 RESOURCE MANAGEMENTFigur
Page 212 and 213:
CHAPTER 7 RESOURCE MANAGEMENTOver-
Page 214 and 215:
CHAPTER 7 RESOURCE MANAGEMENT50% m
Page 216 and 217:
CHAPTER 7 RESOURCE MANAGEMENT Note
Page 218 and 219:
CHAPTER 7 RESOURCE MANAGEMENTI/O R
Page 220 and 221:
Page 222 and 223:
CHAPTER 7 RESOURCE MANAGEMENTdbPla
Page 224 and 225:
CHAPTER 7 RESOURCE MANAGEMENTthumb
Page 226 and 227:
Page 228 and 229:
CHAPTER 7 RESOURCE MANAGEMENTInter
Page 230 and 231:
CHAPTER 7 RESOURCE MANAGEMENTAn IO
Page 232 and 233:
CHAPTER 7 RESOURCE MANAGEMENTgroup
Page 234 and 235:
CHAPTER 7 RESOURCE MANAGEMENTLIST
Page 236 and 237:
CHAPTER 7 RESOURCE MANAGEMENT[enkd
Page 238 and 239:
CHAPTER 7 RESOURCE MANAGEMENTCateg
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
C H A P T E R 8Configuring ExadataO
Page 246 and 247:
CHAPTER 8 CONFIGURING EXADATAThe P
Page 248 and 249:
CHAPTER 8 CONFIGURING EXADATAregis
Page 250 and 251:
CHAPTER 8 CONFIGURING EXADATATable
Page 252 and 253:
CHAPTER 8 CONFIGURING EXADATA Note
Page 254 and 255:
CHAPTER 8 CONFIGURING EXADATAThe t
Page 256 and 257:
Page 258 and 259:
CHAPTER 8 CONFIGURING EXADATANetwo
Page 260 and 261:
CHAPTER 8 CONFIGURING EXADATAConfi
Page 262 and 263:
CHAPTER 8 CONFIGURING EXADATAThere
Page 264 and 265:
CHAPTER 8 CONFIGURING EXADATAFile
Page 266 and 267:
CHAPTER 8 CONFIGURING EXADATAourco
Page 268 and 269:
CHAPTER 8 CONFIGURING EXADATASelec
Page 270 and 271:
CHAPTER 8 CONFIGURING EXADATAMachi
Page 272 and 273:
CHAPTER 8 CONFIGURING EXADATAFile
Page 274 and 275:
Page 276 and 277:
CHAPTER 8 CONFIGURING EXADATAdecid
Page 278 and 279:
CHAPTER 8 CONFIGURING EXADATA• /
Page 280 and 281:
CHAPTER 8 CONFIGURING EXADATA10. U
Page 282 and 283:
CHAPTER 9 RECOVERING EXADATAprovid
Page 284 and 285:
CHAPTER 9 RECOVERING EXADATAconfig
Page 286 and 287:
CHAPTER 9 RECOVERING EXADATACellCL
Page 288 and 289:
CHAPTER 9 RECOVERING EXADATAThe de
Page 290 and 291:
CHAPTER 9 RECOVERING EXADATABackin
Page 292 and 293:
CHAPTER 9 RECOVERING EXADATA/dev/m
Page 294 and 295:
CHAPTER 9 RECOVERING EXADATACELLBO
Page 296 and 297:
CHAPTER 9 RECOVERING EXADATAPartit
Page 298 and 299:
CHAPTER 9 RECOVERING EXADATAThe im
Page 300 and 301:
CHAPTER 9 RECOVERING EXADATAInfini
Page 302 and 303:
CHAPTER 9 RECOVERING EXADATAWait E
Page 304 and 305:
CHAPTER 9 RECOVERING EXADATANetmas
Page 306 and 307:
CHAPTER 9 RECOVERING EXADATASystem
Page 308 and 309:
CHAPTER 9 RECOVERING EXADATA-rw-r-
Page 310 and 311:
CHAPTER 9 RECOVERING EXADATASYS:+A
Page 312 and 313:
CHAPTER 9 RECOVERING EXADATA■ No
Page 314 and 315:
CHAPTER 9 RECOVERING EXADATACellCL
Page 316 and 317:
CHAPTER 9 RECOVERING EXADATAyou sh
Page 318 and 319:
CHAPTER 9 RECOVERING EXADATAPoor P
Page 320 and 321:
CHAPTER 9 RECOVERING EXADATATempor
Page 322 and 323:
CHAPTER 9 RECOVERING EXADATAFri Ja
Page 324 and 325:
CHAPTER 9 RECOVERING EXADATARX byt
Page 326 and 327:
CHAPTER 10 EXADATA WAIT EVENTSSYS@
Page 328 and 329:
CHAPTER 10 EXADATA WAIT EVENTScell
Page 330 and 331:
CHAPTER 10 EXADATA WAIT EVENTScolu
Page 332 and 333:
CHAPTER 10 EXADATA WAIT EVENTSYou
Page 334 and 335:
CHAPTER 10 EXADATA WAIT EVENTSWAIT
Page 336 and 337:
CHAPTER 10 EXADATA WAIT EVENTSEven
Page 338 and 339:
CHAPTER 10 EXADATA WAIT EVENTSTABL
Page 340 and 341:
CHAPTER 10 EXADATA WAIT EVENTSsimp
Page 342 and 343:
Page 344 and 345:
Page 346 and 347:
CHAPTER 10 EXADATA WAIT EVENTSreli
Page 348 and 349:
CHAPTER 10 EXADATA WAIT EVENTSPARS
Page 350 and 351:
C H A P T E R 11Understanding Exada
Page 352 and 353:
CHAPTER 11 UNDERSTANDING EXADATA P
Page 354 and 355:
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Page 362 and 363:
Page 364 and 365:
Page 366 and 367:
Page 368 and 369:
Page 370 and 371:
Page 372 and 373:
Page 374 and 375:
Page 376 and 377:
Page 378 and 379:
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
CHAPTER 12 MONITORING EXADATA PERF
Page 386 and 387:
Page 388 and 389:
Page 390 and 391:
Page 392 and 393:
Page 394 and 395:
Page 396 and 397:
Page 398 and 399:
Page 400 and 401:
Page 402 and 403:
Page 404 and 405:
Page 406 and 407:
Page 408 and 409:
Page 410 and 411:
Page 412 and 413:
Page 414 and 415:
Page 416 and 417:
Page 418 and 419:
Page 420 and 421:
Page 422 and 423:
Page 424 and 425:
CHAPTER 13 MIGRATING TO EXADATA Ke
Page 426 and 427:
CHAPTER 13 MIGRATING TO EXADATAThe
Page 428 and 429:
CHAPTER 13 MIGRATING TO EXADATAreq
Page 430 and 431:
CHAPTER 13 MIGRATING TO EXADATArel
Page 432 and 433:
CHAPTER 13 MIGRATING TO EXADATAhav
Page 434 and 435:
CHAPTER 13 MIGRATING TO EXADATAsco
Page 436 and 437:
CHAPTER 13 MIGRATING TO EXADATAHow
Page 438 and 439:
CHAPTER 13 MIGRATING TO EXADATANow
Page 440 and 441:
CHAPTER 13 MIGRATING TO EXADATAIss
Page 442 and 443:
CHAPTER 13 MIGRATING TO EXADATAimm
Page 444 and 445:
CHAPTER 13 MIGRATING TO EXADATAdir
Page 446 and 447:
CHAPTER 13 MIGRATING TO EXADATAthe
Page 448 and 449:
CHAPTER 13 MIGRATING TO EXADATAcon
Page 450 and 451:
CHAPTER 13 MIGRATING TO EXADATA•
Page 452 and 453:
CHAPTER 13 MIGRATING TO EXADATANot
Page 454 and 455:
CHAPTER 13 MIGRATING TO EXADATAPar
Page 456 and 457:
CHAPTER 13 MIGRATING TO EXADATATra
Page 458 and 459:
CHAPTER 13 MIGRATING TO EXADATAdb_
Page 460 and 461:
CHAPTER 13 MIGRATING TO EXADATARes
Page 462 and 463:
CHAPTER 13 MIGRATING TO EXADATAtak
Page 464 and 465:
CHAPTER 13 MIGRATING TO EXADATAPer
Page 466 and 467:
CHAPTER 13 MIGRATING TO EXADATA53:
Page 468 and 469:
CHAPTER 13 MIGRATING TO EXADATA2.
Page 470 and 471:
C H A P T E R 14Storage LayoutIn Or
Page 472 and 473:
CHAPTER 14 STORAGE LAYOUTFailure G
Page 474 and 475:
CHAPTER 14 STORAGE LAYOUTGrid Disk
Page 476 and 477:
CHAPTER 14 STORAGE LAYOUTASM Disk
Page 478 and 479:
CHAPTER 14 STORAGE LAYOUT1 st Grid
Page 480 and 481:
CHAPTER 14 STORAGE LAYOUTTable 14-
Page 482 and 483:
CHAPTER 14 STORAGE LAYOUTparameter
Page 484 and 485:
CHAPTER 14 STORAGE LAYOUTLinux Par
Page 486 and 487:
CHAPTER 14 STORAGE LAYOUTNotice th
Page 488 and 489:
CHAPTER 14 STORAGE LAYOUTConfigura
Page 490 and 491:
CHAPTER 14 STORAGE LAYOUTsystem. B
Page 492 and 493:
CHAPTER 14 STORAGE LAYOUTCell Secu
Page 494 and 495:
CHAPTER 14 STORAGE LAYOUT1. Shut d
Page 496 and 497:
CHAPTER 14 STORAGE LAYOUTRemoving
Page 498 and 499:
CHAPTER 14 STORAGE LAYOUTSummaryUn
Page 500 and 501:
CHAPTER 15 COMPUTE NODE LAYOUTCPU
Page 502 and 503:
CHAPTER 15 COMPUTE NODE LAYOUTmore
Page 504 and 505:
CHAPTER 15 COMPUTE NODE LAYOUTReca
Page 506 and 507:
CHAPTER 15 COMPUTE NODE LAYOUTWith
Page 508 and 509:
CHAPTER 15 COMPUTE NODE LAYOUTaffe
Page 510 and 511:
CHAPTER 15 COMPUTE NODE LAYOUTspin
Page 512 and 513:
C H A P T E R 16Unlearning Some Thi
Page 514 and 515:
CHAPTER 16 UNLEARNING SOME THINGS
Page 516 and 517:
Page 518 and 519:
Page 520 and 521:
Page 522 and 523:
Page 524 and 525:
Page 526 and 527:
Page 528 and 529:
Page 530 and 531:
Page 532 and 533:
Page 534 and 535:
Page 536 and 537:
A P P E N D I X ACellCLI and dcliCe
Page 538 and 539:
APPENDIX A CELLCLI AND DCLILIST FL
Page 540 and 541:
APPENDIX A CELLCLI AND DCLIEXDB 42
Page 542 and 543:
APPENDIX A CELLCLI AND DCLICellCLI
Page 544 and 545:
APPENDIX A CELLCLI AND DCLI• Dis
Page 546 and 547:
A P P E N D I X BOnline Exadata Res
Page 548 and 549:
A P P E N D I X CDiagnostic Scripts
Page 550 and 551:
APPENDIX C DIAGNOSTIC SCRIPTSScrip
Page 552 and 553:
Index• AAccess control list (ACL)
Page 554 and 555:
• INDEXnetwork componentsclient a
Page 556 and 557:
• INDEX• Epredicate offload, 36
Page 558 and 559:
• INDEXOTHER_GROUPS consumer grou
Page 560 and 561:
• INDEXCPU utilization, 152mixed
Page 562 and 563:
• INDEXstructure, 105sub-query, 1
Page 564 and 565:
Expert Oracle Exadatan n nKerry Osb
Page 566 and 567:
Contents• About the Authors......
Page 568 and 569:
• CONTENTSHow to Verify That Smar
Page 570 and 571:
• CONTENTSControlling ESFC Usage
Page 572 and 573:
• CONTENTSSummary ...............
Page 574 and 575:
• CONTENTS• Chapter 12: Monitor
Page 576 and 577:
• CONTENTS• Chapter 16: Unlearn
Page 578 and 579:
About the Technical Reviewer Kevin
show all

Expert Oracle Exadata - Parent Directory

Create successful ePaper yourself

Delete template?

Save as template?