10. AWR Report Header WORKLOAD REPOSITORY report for DB Name DB Id Instance Inst Num Startup Time Release RAC ------------ ----------- ------------ -------- --------------- ----------- --- AULTDB 4030696936 aultdb1 1 04-Aug-08 10:16 11.1.0.6.0 YES Host Name Platform CPUs Cores Sockets Memory(GB) ---------------- -------------------------------- ---- ----- ------- ---------- aultlinux3 Linux IA (32-bit) 2 1 1 2.97 Snap Id Snap Time Sessions Curs/Sess --------- ------------------- -------- --------- Begin Snap: 91 04-Aug-08 12:00:15 41 1.2 End Snap: 92 04-Aug-08 13:00:28 47 1.1 Elapsed: 60.22 (mins) DB Time: 139.52 (mins) Cache Sizes Begin End ~~~~~~~~~~~ ---------- ---------- Buffer Cache: 1,312M 1,312M Std Block Size: 8K Shared Pool Size: 224M 224M Log Buffer: 10,604K
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12. Load Profile Section Load Profile Per Second Per Transaction Per Exec Per Call ~~~~~~~~~~~~ --------------- --------------- ---------- ---------- DB Time(s): 2.3 7.1 0.63 1.05 DB CPU(s): 0.3 0.9 0.07 0.13 Redo size: 800.5 2,461.8 Logical reads: 6,307.6 19,396.7 Block changes: 3.6 10.9 Physical reads: 2,704.9 8,317.8 Physical writes: 86.9 267.3 User calls: 2.2 6.8 Parses: 2.0 6.1 Hard parses: 0.0 0.1 W/A MB processed: 932,965.4 2,868,990.9 Logons: 0.1 0.2 Executes: 3.7 11.3 Rollbacks: 0.1 0.3 Transactions: 0.3
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14. Load Profile Section Instance Efficiency Percentages (Target 100%) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Buffer Nowait %: 100.00 Redo NoWait %: 99.97 Buffer Hit %: 96.09 In-memory Sort %: 100.00 Library Hit %: 98.17 Soft Parse %: 97.88 Execute to Parse %: 45.80 Latch Hit %: 99.95 Parse CPU to Parse Elapsd %: 0.00 % Non-Parse CPU: 99.77 Shared Pool Statistics Begin End ------ ------ Memory Usage %: 81.53 85.39 % SQL with executions>1: 79.29 79.48 % Memory for SQL w/exec>1: 76.73 78.19
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16. Top 5 Waits Section With possible cache starvation Top 5 Timed Foreground Events ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Avg wait % DB Event Waits Time(s) (ms) time Wait Class ------------------------------ ------------ ----------- ------ ------ ---------- db file sequential read 465,020 3,969 9 47.4 User I/O DB CPU 995 11.9 db file parallel read 2,251 322 143 3.8 User I/O db file scattered read 15,268 153 10 1.8 User I/O gc current block 2-way 108,739 116 1 1.4 Cluster
17. Top 5 Waits Section With Shared Pool Issues Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time Wait Class ------------------------------ ------------ ----------- ------ ------ ---------- CPU time 435,461 41.1 PX Deq Credit: send blkd 124,829,330 138,223 1 13.0 Other library cache pin 20,347 57,692 2835 5.4 Concurrenc library cache lock 19,226 56,078 2917 5.3 Concurrenc db file sequential read 16,798,329 42,215 3 4.0 User I/O ------------------------------------------------------------- Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time Wait Class ------------------------------ ------------ ----------- ------ ------ ---------- CPU time 24,956 29.3 latch: library cache 1,757,331 9,886 6 11.6 Concurrenc db file sequential read 759,605 6,146 8 7.2 User I/O cursor: pin S 2,103,389 4,988 2 5.9 Other log file sync 250,039 2,387 10 2.8 Commit -------------------------------------------------------------
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24. Classes Wait Class DB/Inst: Snaps: 84084-84108 -> s - second -> cs - centisecond - 100th of a second -> ms - millisecond - 1000th of a second -> us - microsecond - 1000000th of a second -> ordered by wait time desc, waits desc Avg %Time Total Wait wait Waits Wait Class Waits -outs Time (s) (ms) /txn -------------------- ---------------- ------ ---------------- ------- --------- Other 153,619,985 16.5 192,921 1 102.3 Concurrency 2,536,362 26.9 128,816 51 1.7 User I/O 30,594,385 .0 124,207 4 20.4 System I/O 5,104,873 .0 17,633 3 3.4 Application 65,645 5.0 6,508 99 0.0 Commit 267,317 .0 4,234 16 0.2 Configuration 553,825 69.5 858 2 0.4 Network 13,513,847 .0 274 0 9.0 Administrative 30 70.0 0 10 0.0 -------------------------------------------------------------
30. System Statistics user I/O wait time 12,422,069 575.6 8.3 user calls 8,038,839 372.5 5.4 user commits 1,439,821 66.7 1.0 user rollbacks 61,684 2.9 0.0 workarea executions - multipass 0 0.0 0.0 workarea executions - onepass 5,293 0.3 0.0 workarea executions - optimal 7,113,060 329.6 4.7
31. Instance Activity Statistics Instance Activity Stats - Absolute -> Statistics with absolute values (should not be diffed) Statistic Begin Value End Value -------------------------------- --------------- --------------- session cursor cache count 28,024,069 28,789,659 opened cursors current 2,921 6,982 workarea memory allocated 289,532 2,531,741 logons current 144 287 --------------------------------------------------
35. Buffer Pool Advisory Section Buffer Pool Advisory -> Only rows with estimated physical reads >0 are displayed -> ordered by Block Size, Buffers For Estimate Est Phys Size for Size Buffers for Read Estimated P Est (M) Factor Estimate Factor Physical Reads --- -------- ------ ---------------- ------ ------------------ D 5,344 .1 335,670 1.9 15,767,325,073 D 10,688 .2 671,340 1.4 11,371,357,960 … D 106,880 2.0 6,713,400 1.0 7,964,367,701 K 512 .1 32,160 102.8 3,507,100,178 K 1,024 .2 64,320 7.8 264,615,629 K 1,536 .3 96,480 1.4 49,384,590 … K 10,240 2.0 643,200 1.0 32,639,643 ----------------------------------------------
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40. PGA Analysis PGA Aggr Summary DB/Inst: Snaps: 84084-84108 -> PGA cache hit % - percentage of W/A (WorkArea) data processed only in-memory PGA Cache Hit % W/A MB Processed Extra W/A MB Read/Written --------------- ------------------ -------------------------- 82.1 4,495,435 979,073 -------------------------------------------------------------
41. PGA Analysis PGA Aggr Target Stats DB/Inst: Snaps: 84084-84108 -> B: Begin snap E: End snap (rows dentified with B or E contain data which is absolute i.e. not diffed over the interval) -> Auto PGA Target - actual workarea memory target -> W/A PGA Used - amount of memory used for all Workareas (manual + auto) -> %PGA W/A Mem - percentage of PGA memory allocated to workareas -> %Auto W/A Mem - percentage of workarea memory controlled by Auto Mem Mgmt -> %Man W/A Mem - percentage of workarea memory under manual control %PGA %Auto %Man PGA Aggr Auto PGA PGA Mem W/A PGA W/A W/A W/A Global Mem Target(M) Target(M) Alloc(M) Used(M) Mem Mem Mem Bound(K) - ---------- ---------- ---------- ---------- ------ ------ ------ ---------- B 5,120 4,320 1,680.5 193.5 11.5 99.7 .3 524,280 E 5,120 4,202 4,400.5 2,219.2 50.4 99.9 .1 524,280 -------------------------------------------------------------
47. Shared Pool Advisor Shared Pool Advisory DB/Inst: Snap: 84108 -> SP: Shared Pool Est LC: Estimated Library Cache Factr: Factor -> Note there is often a 1:Many correlation between a single logical object in the Library Cache, and the physical number of memory objects associated with it. Therefore comparing the number of Lib Cache objects (e.g. in v$librarycache), with the number of Lib Cache Memory Objects is invalid. Est LC Est LC Est LC Est LC Shared SP Est LC Time Time Load Load Est LC Pool Size Size Est LC Saved Saved Time Time Mem Size(M) Factr (M) Mem Obj (s) Factr (s) Factr Obj Hits ---------- ----- -------- ------------ ------- ------ ------- ------ ----------- 2,160 .4 619 76,837 ####### 1.0 ####### 2.4 88,538,740 2,736 .5 1,188 95,749 ####### 1.0 ####### 2.1 88,936,333 3,312 .6 1,761 110,785 ####### 1.0 ####### 1.8 89,297,339 3,888 .7 2,333 125,755 ####### 1.0 ####### 1.6 89,610,155 … 8,496 1.5 6,916 238,592 ####### 1.0 ####### .5 91,076,008 9,072 1.6 7,489 252,248 ####### 1.0 ####### .4 91,187,541 9,648 1.7 8,061 264,748 ####### 1.0 ####### .3 91,291,114 10,224 1.8 8,632 274,837 ####### 1.0 ####### .3 91,388,340 10,800 1.9 9,201 284,723 ####### 1.0 ####### .2 91,480,577 11,376 2.0 9,774 293,073 ####### 1.0 ####### .2 91,569,191 -------------------------------------------------------------
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51. Streams Pool Advisor Streams Pool Advisory DB/Inst: Snap: 84108 Size for Size Est Spill Est Spill Est Unspill Est Unspill Est (MB) Factor Count Time (s) Count Time (s) ---------- --------- ----------- ----------- ----------- ----------- 16 0.5 0 0 0 0 32 1.0 0 0 0 0 48 1.5 0 0 0 0 64 2.0 0 0 0 0 80 2.5 0 0 0 0 … 240 7.5 0 0 0 0 256 8.0 0 0 0 0 272 8.5 0 0 0 0 288 9.0 0 0 0 0 304 9.5 0 0 0 0 320 10.0 0 0 0 0 -------------------------------------------------------------
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53. Java Pool Advisor Java Pool Advisory DB/Inst: Snap: 37 Est LC Est LC Est LC Est LC Java JP Est LC Time Time Load Load Est LC Pool Size Size Est LC Saved Saved Time Time Mem Size(M) Factr (M) Mem Obj (s) Factr (s) Factr Obj Hits ---------- ----- -------- ---------- ------- ------ ------- ------ ----------- 64 .5 10 168 10 1.0 11,974 1.0 389 128 1.0 12 201 10 1.0 11,974 1.0 465 192 1.5 12 201 10 1.0 11,974 1.0 465 256 2.0 12 201 10 1.0 11,974 1.0 465 -------------------------------------------------------------