Comments on: Statspack Analyzer – Intelligent analysis of Oracle Statspack and AWR reports

By: sandeep patra

sandeep patra — Wed, 27 Jan 2010 13:33:06 +0000

WORKLOAD REPOSITORY report for

DB Name DB Id Instance Inst Num Release RAC Host
———— ———– ———— ——– ———– — ————
PAST01 340786915 past01 1 10.2.0.2.0 NO vsl001a012

Snap Id Snap Time Sessions Curs/Sess
——— ——————- ——– ———
Begin Snap: 8218 24-Jan-10 19:00:50 28 1.9
End Snap: 8219 24-Jan-10 20:02:14 28 2.0
Elapsed: 61.40 (mins)
DB Time: 11.49 (mins)

Cache Sizes
~~~~~~~~~~~ Begin End
———- ———-
Buffer Cache: 144M 144M Std Block Size: 8K
Shared Pool Size: 592M 592M Log Buffer: 30,744K

Load Profile
~~~~~~~~~~~~ Per Second Per Transaction
————— —————
Redo size: 17,892.92 9,398.58
Logical reads: 111.15 58.38
Block changes: 61.25 32.17
Physical reads: 0.61 0.32
Physical writes: 3.02 1.59
User calls: 33.27 17.47
Parses: 11.67 6.13
Hard parses: 0.00 0.00
Sorts: 0.46 0.24
Logons: 0.00 0.00
Executes: 12.35 6.49
Transactions: 1.90

% Blocks changed per Read: 55.10 Recursive Call %: 20.48
Rollback per transaction %: 0.01 Rows per Sort: 7.56

Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Buffer Nowait %: 100.00 Redo NoWait %: 99.97
Buffer Hit %: 99.78 In-memory Sort %: 100.00
Library Hit %: 99.96 Soft Parse %: 99.96
Execute to Parse %: 5.47 Latch Hit %: 99.98
Parse CPU to Parse Elapsd %: 89.59 % Non-Parse CPU: 94.67

Shared Pool Statistics Begin End
—— ——
Memory Usage %: 90.97 91.05
% SQL with executions>1: 99.16 99.12
% Memory for SQL w/exec>1: 90.60 90.75

Top 5 Timed Events Avg %Total
~~~~~~~~~~~~~~~~~~ wait Call
Event Waits Time (s) (ms) Time Wait Class
—————————— ———— ———– —— —— ———-
enq: TX – row lock contention 249 589 2367 85.5 Applicatio
latch: shared pool 970 535 551 77.6 Concurrenc
enq: PR – contention 29 81 2783 11.7 Other
CPU time 61 8.9
log file parallel write 7,758 47 6 6.8 System I/O
————————————————————-
^LTime Model Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Total time in database user-calls (DB Time): 689.1s
-> Statistics including the word “background” measure background process
time, and so do not contribute to the DB time statistic
-> Ordered by % or DB time desc, Statistic name

Statistic Name Time (s) % of DB Time
—————————————— —————— ————
sql execute elapsed time 628.7 91.2
DB CPU 61.4 8.9
parse time elapsed 6.0 .9
hard parse elapsed time 2.4 .4
failed parse (out of shared memory) elapse 2.2 .3
failed parse elapsed time 2.2 .3
hard parse (sharing criteria) elapsed time 0.2 .0
sequence load elapsed time 0.1 .0
hard parse (bind mismatch) elapsed time 0.0 .0
repeated bind elapsed time 0.0 .0
DB time 689.1 N/A
background elapsed time 765.8 N/A
background cpu time 58.4 N/A
————————————————————-

Wait Class DB/Inst: PAST01/past01 Snaps: 8218-8219
-> 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
——————– —————- —— —————- ——- ———
Application 251 76.9 589 2348 0.0
Concurrency 1,031 94.5 552 535 0.1
Other 4,227 98.8 97 23 0.6
System I/O 10,656 .0 68 6 1.5
Commit 7,579 .0 43 6 1.1
User I/O 3,753 .0 13 4 0.5
Network 89,262 .0 2 0 12.7
Configuration 5 .0 1 116 0.0
————————————————————-

^LWait Events DB/Inst: PAST01/past01 Snaps: 8218-8219
-> 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 (idle events last)

Event ———— enq: TX – row lock contentio latch: shared pool enq: PR – contention log file parallel write log file sync os thread startup latch: session allocation db file sequential read control file parallel write Log archive I/O log file sequential read SQL*Net message to client log file switch completion ksdxexeotherwait SQL*Net more data from clien latch: library cache latch free control file sequential read direct path write log file single write SQL*Net break/reset to clien SGA: allocation forcing comp latch: cache buffers lru cha direct path read latch: checkpoint queue latc latch: redo allocation latch: cache buffers chains latch: messages LGWR wait for redo copy rdbms ipc reply latch: enqueue hash chains latch: redo writing latch: virtual circuit queue virtual circuit status Streams AQ: qmn slave idle w Streams AQ: qmn coordinator SQL*Net message from client —— Avg
%Time Total Wait wait Waits
Waits -outs Time (s) (ms) /txn
;—————- ————– —— ———– ——- ———
249 77.5 589 2367 0.0
970 99.5 535 551 0.1
29 93.1 81 2783 0.0
7,758 .0 47 6 1.1
7,579 .0 43 6 1.1
48 18.8 17 344 0.0
5 .0 15 3077 0.0
1,944 .0 13 7 0.3
1,250 .0 11 9 0.2
92 .0 6 66 0.0
91 .0 4 48 0.0
84,675 .0 2 0 12.1
2 .0 1 290 0.0
4,148 100.0 0 0 0.6
4,587 .0 0 0 0.7
6 .0 0 24 0.0
10 .0 0 14 0.0
1,461 .0 0 0 0.2
1,494 .0 0 0 0.2
4 .0 0 5 0.0
2 .0 0 6 0.0
11 .0 0 1 0.0
3 .0 0 4 0.0
315 .0 0 0 0.0
2 .0 0 2 0.0
2 .0 0 1 0.0
7 .0 0 0 0.0
1 .0 0 2 0.0
11 .0 0 0 0.0
1 .0 0 1 0.0
1 100.0 0 1 0.0
3 .0 0 0 0.0
3 .0 0 0 0.0
56,849 .1 3,940 69 8.1
132 .0 3,626 27473 0.0
273 51.6 3,626 13283 0.0
84,649 .0 3,458 41 12.1
212;—————————————————-

^LBackground Wait Events DB/Inst: PAST01/past01 Snaps: 8218-8219
-> ordered by wait time desc, waits desc (idle events last)

Avg
%Time Total Wait wait Waits
Event Waits -outs Time (s) (ms) /txn
—————————- ————– —— ———– ——- ———
latch: shared pool 970 99.5 535 551 0.1
events in waitclass Other 4,204 99.3 90 21 0.6
log file parallel write 7,758 .0 47 6 1.1
os thread startup 49 20.4 18 357 0.0
control file parallel write 1,250 .0 11 9 0.2
Log archive I/O 92 .0 6 66 0.0
log file sequential read 91 .0 4 48 0.0
db file sequential read 27 .0 2 62 0.0
control file sequential read 803 .0 0 0 0.1
log file single write 4 .0 0 5 0.0
direct path write 8 .0 0 0 0.0
latch: redo writing 3 .0 0 0 0.0
direct path read 8 .0 0 0 0.0
latch: cache buffers chains 1 .0 0 0 0.0
rdbms ipc message 19,484 60.5 39,136 2009 2.8
smon timer 15 86.7 3,823 254854 0.0
Streams AQ: qmn slave idle w 132 .0 3,626 27473 0.0
Streams AQ: qmn coordinator 273 51.6 3,626 13283 0.0
pmon timer 1,140 99.9 3,316 2909 0.2
————————————————————-

Operating System Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219

Statistic Total
——————————– ——————–
BUSY_TIME 31,813
IDLE_TIME 708,131
IOWAIT_TIME 28,758
NICE_TIME 0
SYS_TIME 19,554
USER_TIME 7,318
LOAD 1
RSRC_MGR_CPU_WAIT_TIME 0
PHYSICAL_MEMORY_BYTES 2,048,012
NUM_CPUS 2
————————————————————-

^LService Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219
-> ordered by DB Time

Physical Logical
Service Name DB Time (s) DB CPU (s) Reads Reads
——————————– ———— ———— ———- ———-
past01 683.2 61.4 2,173 395,473
SYS$BACKGROUND 0.0 0.0 77 14,132
SYS$USERS 0.0 0.0 0 0
————————————————————-

Service Wait Class Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Wait Class info for services in the Service Statistics section.
-> Total Waits and Time Waited displayed for the following wait
classes: User I/O, Concurrency, Administrative, Network
-> Time Waited (Wt Time) in centisecond (100th of a second)

Service Name
—————————————————————-
User I/O User I/O Concurcy Concurcy Admin Admin Network Network
Total Wts Wt Time Total Wts Wt Time Total Wts Wt Time Total Wts Wt Time
——— ——— ——— ——— ——— ——— ——— ———
past01
3659 1140 12 15 0 0 89262 211
SYS$BACKGROUND
93 198 1019 55148 0 0 0 0
SYS$USERS
0 0 0 0 0 0 0 0
————————————————————-

^LSQL ordered by Elapsed Time DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by CPU Time DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Gets DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Reads DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Executions DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Parse Calls DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Sharable Memory DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSQL ordered by Version Count DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LInstance Activity Stats DB/Inst: PAST01/past01 Snaps: 8218-8219

Statistic Total per Second per Trans
——————————– —————— ————– ————-
CPU used by this session 5,714 1.6 0.8
CPU used when call started 4,106 1.1 0.6
CR blocks created 154 0.0 0.0
Cached Commit SCN referenced 0 0.0 0.0
Commit SCN cached 0 0.0 0.0
DB time 21,649 5.9 3.1
DBWR checkpoint buffers written 10,388 2.8 1.5
DBWR checkpoints 1 0.0 0.0
DBWR revisited being-written buf 0 0.0 0.0
DBWR tablespace checkpoint buffe 0 0.0 0.0
DBWR thread checkpoint buffers w 0 0.0 0.0
DBWR transaction table writes 116 0.0 0.0
DBWR undo block writes 3,307 0.9 0.5
IMU CR rollbacks 62 0.0 0.0
IMU Flushes 3,123 0.9 0.5
IMU Redo allocation size 15,614,600 4,238.2 2,226.2
IMU commits 2,388 0.7 0.3
IMU contention 590 0.2 0.1
IMU ktichg flush 0 0.0 0.0
IMU pool not allocated 1,656 0.5 0.2
IMU recursive-transaction flush 29 0.0 0.0
IMU undo allocation size 36,313,872 9,856.6 5,177.3
IMU- failed to get a private str 1,656 0.5 0.2
Misses for writing mapping 0 0.0 0.0
SMON posted for undo segment shr 2 0.0 0.0
SQL*Net roundtrips to/from clien 162,371 44.1 23.2
active txn count during cleanout 1,570 0.4 0.2
application wait time 58,932 16.0 8.4
background checkpoints completed 1 0.0 0.0
background checkpoints started 1 0.0 0.0
background timeouts 11,825 3.2 1.7
branch node splits 3 0.0 0.0
buffer is not pinned count 12,866 3.5 1.8
buffer is pinned count 653 0.2 0.1
bytes received via SQL*Net from 33,602,391 9,120.6 4,790.8
bytes sent via SQL*Net to client 351,226,114,381 95,332,272.7 50,075,009.2
calls to get snapshot scn: kcmgs 80,395 21.8 11.5
calls to kcmgas 9,763 2.7 1.4
calls to kcmgcs 1,042 0.3 0.2
change write time 702 0.2 0.1
cleanout – number of ktugct call 3,160 0.9 0.5
cleanouts and rollbacks – consis 122 0.0 0.0
cleanouts only – consistent read 101 0.0 0.0
cluster key scan block gets 6,186 1.7 0.9
cluster key scans 88 0.0 0.0
commit batch/immediate performed 1 0.0 0.0
commit batch/immediate requested 1 0.0 0.0
commit cleanout failures: block 0 0.0 0.0
commit cleanout failures: buffer 7 0.0 0.0
commit cleanout failures: callba 47 0.0 0.0
commit cleanout failures: cannot 970 0.3 0.1
commit cleanouts 85,915 23.3 12.3
commit cleanouts successfully co 84,891 23.0 12.1
commit immediate performed 1 0.0 0.0
commit immediate requested 1 0.0 0.0
commit txn count during cleanout 7,397 2.0 1.1
concurrency wait time 55,261 15.0 7.9
consistent changes 188 0.1 0.0
consistent gets 56,293 15.3 8.0
consistent gets – examination 29,215 7.9 4.2
^LInstance Activity Stats DB/Inst: PAST01/past01 Snaps: 8218-8219

Statistic Total per Second per Trans
——————————– —————— ————– ————-
consistent gets direct 1,228 0.3 0.2
consistent gets from cache 55,065 15.0 7.9
current blocks converted for CR 0 0.0 0.0
cursor authentications 16 0.0 0.0
data blocks consistent reads – u 154 0.0 0.0
db block changes 225,649 61.3 32.2
db block gets 353,197 95.9 50.4
db block gets direct 744 0.2 0.1
db block gets from cache 352,453 95.7 50.3
deferred (CURRENT) block cleanou 33,116 9.0 4.7
dirty buffers inspected 0 0.0 0.0
enqueue conversions 9,494 2.6 1.4
enqueue releases 53,907 14.6 7.7
enqueue requests 53,911 14.6 7.7
enqueue timeouts 0 0.0 0.0
enqueue waits 58 0.0 0.0
exchange deadlocks 0 0.0 0.0
execute count 45,487 12.4 6.5
failed probes on index block rec 8 0.0 0.0
free buffer inspected 3,137 0.9 0.5
free buffer requested 2,835 0.8 0.4
heap block compress 1,450 0.4 0.2
hot buffers moved to head of LRU 2,713 0.7 0.4
immediate (CR) block cleanout ap 223 0.1 0.0
immediate (CURRENT) block cleano 9,099 2.5 1.3
index fast full scans (full) 0 0.0 0.0
index fetch by key 11,957 3.3 1.7
index scans kdiixs1 4,509 1.2 0.6
leaf node 90-10 splits 100 0.0 0.0
leaf node splits 253 0.1 0.0
lob reads 0 0.0 0.0
lob writes 8,641 2.4 1.2
lob writes unaligned 8,099 2.2 1.2
logons cumulative 2 0.0 0.0
messages received 12,234 3.3 1.7
messages sent 12,226 3.3 1.7
no buffer to keep pinned count 0 0.0 0.0
no work – consistent read gets 10,282 2.8 1.5
opened cursors cumulative 43,105 11.7 6.2
parse count (failures) 2 0.0 0.0
parse count (hard) 17 0.0 0.0
parse count (total) 43,001 11.7 6.1
parse time cpu 327 0.1 0.1
parse time elapsed 365 0.1 0.1
physical read IO requests 2,257 0.6 0.3
physical read bytes 18,489,344 5,018.5 2,636.1
physical read total IO requests 3,817 1.0 0.5
physical read total bytes 128,934,400 34,996.3 18,382.4
physical read total multi block 83 0.0 0.0
physical reads 2,257 0.6 0.3
physical reads cache 1,198 0.3 0.2
physical reads cache prefetch 0 0.0 0.0
physical reads direct 1,059 0.3 0.2
physical reads direct (lob) 307 0.1 0.0
physical reads direct temporary 0 0.0 0.0
physical reads prefetch warmup 0 0.0 0.0
physical write IO requests 5,271 1.4 0.8
physical write bytes 91,258,880 24,770.1 13,011.0
physical write total IO requests 23,440 6.4 3.3
physical write total bytes 359,137,792 97,479.7 51,203.0
^LInstance Activity Stats DB/Inst: PAST01/past01 Snaps: 8218-8219

Statistic Total per Second per Trans
——————————– —————— ————– ————-
physical write total multi block 15,662 4.3 2.2
physical writes 11,140 3.0 1.6
physical writes direct 752 0.2 0.1
physical writes direct (lob) 744 0.2 0.1
physical writes direct temporary 0 0.0 0.0
physical writes from cache 10,388 2.8 1.5
physical writes non checkpoint 3,018 0.8 0.4
pinned buffers inspected 0 0.0 0.0
prefetch warmup blocks aged out 0 0.0 0.0
prefetched blocks aged out befor 0 0.0 0.0
process last non-idle time 0 0.0 0.0
recursive aborts on index block 0 0.0 0.0
recursive calls 31,558 8.6 4.5
recursive cpu usage 549 0.2 0.1
redo blocks written 137,218 37.2 19.6
redo buffer allocation retries 30 0.0 0.0
redo entries 88,315 24.0 12.6
redo log space requests 30 0.0 0.0
redo log space wait time 60 0.0 0.0
redo ordering marks 718 0.2 0.1
redo size 65,921,652 17,892.9 9,398.6
redo synch time 4,467 1.2 0.6
redo synch writes 13,185 3.6 1.9
redo wastage 2,077,560 563.9 296.2
redo write time 4,842 1.3 0.7
redo writer latching time 1 0.0 0.0
redo writes 7,758 2.1 1.1
rollback changes – undo records 3 0.0 0.0
rollbacks only – consistent read 32 0.0 0.0
rows fetched via callback 2,789 0.8 0.4
session connect time 0 0.0 0.0
session cursor cache hits 1,383 0.4 0.2
session logical reads 409,490 111.2 58.4
session pga memory 148,128 40.2 21.1
session pga memory max 82,592 22.4 11.8
session uga memory 120,688 32.8 17.2
session uga memory max 4,495,016 1,220.1 640.9
shared hash latch upgrades – no 5,066 1.4 0.7
shared hash latch upgrades – wai 0 0.0 0.0
sorts (disk) 0 0.0 0.0
sorts (memory) 1,678 0.5 0.2
sorts (rows) 12,693 3.5 1.8
sql area evicted 1 0.0 0.0
sql area purged 2 0.0 0.0
summed dirty queue length 0 0.0 0.0
switch current to new buffer 437 0.1 0.1
table fetch by rowid 3,325 0.9 0.5
table fetch continued row 8 0.0 0.0
table scan blocks gotten 2,129 0.6 0.3
table scan rows gotten 46,470 12.6 6.6
table scans (cache partitions) 0 0.0 0.0
table scans (long tables) 0 0.0 0.0
table scans (short tables) 253 0.1 0.0
total number of times SMON poste 2 0.0 0.0
transaction rollbacks 1 0.0 0.0
transaction tables consistent re 0 0.0 0.0
transaction tables consistent re 0 0.0 0.0
undo change vector size 22,732,468 6,170.2 3,241.0
user I/O wait time 1,365 0.4 0.2
user calls 122,556 33.3 17.5
^LInstance Activity Stats DB/Inst: PAST01/past01 Snaps: 8218-8219

Statistic Total per Second per Trans
——————————– —————— ————– ————-
user commits 7,013 1.9 1.0
user rollbacks 1 0.0 0.0
workarea executions – onepass 0 0.0 0.0
workarea executions – optimal 437 0.1 0.1
write clones created in backgrou 0 0.0 0.0
write clones created in foregrou 6 0.0 0.0
————————————————————-

^LInstance Activity Stats – Absolute ValuesDB/Inst: PAST01/past01 Snaps: 8218-
-> Statistics with absolute values (should not be diffed)

Statistic Begin Value End Value
——————————– ————— —————
session cursor cache count 87,642 87,682
opened cursors current 53 56
workarea memory allocated 116 116
logons current 28 28
————————————————————-

Instance Activity Stats – Thread ActivityDB/Inst: PAST01/past01 Snaps: 8218-8
-> Statistics identified by ‘(derived)’ come from sources other than SYSSTAT

Statistic Total per Hour
——————————– —————— ———
log switches (derived) 1 .98
————————————————————-

^LTablespace IO Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> ordered by IOs (Reads + Writes) desc

Tablespace
——————————
Av Av Av Av Buffer Av Buf
Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms)
————– ——- —— ——- ———— ——– ———- ——
PAS_DATA
2,175 1 5.3 1.0 4,707 1 0 0.0
UNDOTBS
2 0 0.0 1.0 339 0 0 0.0
SYSAUX
48 0 29.6 1.0 148 0 0 0.0
SYSTEM
21 0 23.3 1.0 75 0 0 0.0
INDX
1 0 0.0 1.0 1 0 0 0.0
USERS
1 0 0.0 1.0 1 0 0 0.0
————————————————————-

^LFile IO Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> ordered by Tablespace, File

Tablespace Filename
———————— —————————————————-
Av Av Av Av Buffer Av Buf
Reads Reads/s Rd(ms) Blks/Rd Writes Writes/s Waits Wt(ms)
————– ——- —— ——- ———— ——– ———- ——
INDX /dborafiles/vdc/pas/past01/oradata01/indx01.dbf
1 0 0.0 1.0 1 0 0 0.0
PAS_DATA /dborafiles/vdc/pas/past01/oradata01/pasdata01.dbf
1,488 0 6.4 1.0 2,277 1 0 0.0
PAS_DATA /dborafiles/vdc/pas/past01/oradata02/pasdata02.dbf
687 0 2.8 1.0 2,430 1 0 0.0
SYSAUX /dborafiles/vdc/pas/past01/oradata01/sysaux01.dbf
48 0 29.6 1.0 148 0 0 0.0
SYSTEM /dborafiles/vdc/pas/past01/oradata01/system01.dbf
21 0 23.3 1.0 75 0 0 0.0
UNDOTBS /dborafiles/vdc/pas/past01/oradata01/undotbs01.dbf
1 0 0.0 1.0 236 0 0 0.0
UNDOTBS /dborafiles/vdc/pas/past01/oradata02/undotbs02.dbf
1 0 0.0 1.0 103 0 0 0.0
USERS /dborafiles/vdc/pas/past01/oradata01/users01.dbf
1 0 0.0 1.0 1 0 0 0.0
————————————————————-

^LBuffer Pool Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Standard block size Pools D: default, K: keep, R: recycle
-> Default Pools for other block sizes: 2k, 4k, 8k, 16k, 32k

Free Writ Buffer
Number of Pool Buffer Physical Physical Buff Comp Busy
P Buffers Hit% Gets Reads Writes Wait Wait Waits
— ———- —- ————– ———— ———– —- —- ———-
D 17,847 100 407,487 1,182 10,388 0 0 0
————————————————————-

Instance Recovery Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> B: Begin snapshot, E: End snapshot

Targt Estd Log File Log Ckpt Log Ckpt
MTTR MTTR Recovery Actual Target Size Timeout Interval
(s) (s) Estd IOs Redo Blks Redo Blks Redo Blks Redo Blks Redo Blks
- —– —– ———- ——— ——— ———- ——— ————
B 0 19 771 11520 68786 552960 68786 N/A
E 0 19 153 356 57847 552960 57847 N/A
————————————————————-

Buffer Pool Advisory DB/Inst: PAST01/past01 Snap: 8219
-> 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 16 .1 1,983 1.2 51,598,018
D 32 .2 3,966 1.1 46,297,341
D 48 .3 5,949 1.1 45,547,576
D 64 .4 7,932 1.0 44,976,656
D 80 .6 9,915 1.0 43,778,798
D 96 .7 11,898 1.0 43,438,238
D 112 .8 13,881 1.0 43,245,302
D 128 .9 15,864 1.0 43,070,456
D 144 1.0 17,847 1.0 42,890,301
D 160 1.1 19,830 1.0 42,771,297
D 176 1.2 21,813 1.0 42,667,937
D 192 1.3 23,796 1.0 42,602,022
D 208 1.4 25,779 1.0 42,552,691
D 224 1.6 27,762 1.0 42,509,345
D 240 1.7 29,745 1.0 42,433,796
D 256 1.8 31,728 1.0 42,319,599
D 272 1.9 33,711 1.0 42,273,588
D 288 2.0 35,694 1.0 42,036,564
————————————————————-

^LPGA Aggr Summary DB/Inst: PAST01/past01 Snaps: 8218-8219
-> 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
————— —————— ————————–
100.0 8 0
————————————————————-

PGA Aggr Target Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> 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 191 112 143.5 0.1 .1 100.0 .0 39,062
E 191 112 143.2 0.1 .1 100.0 .0 39,062
————————————————————-

PGA Aggr Target Histogram DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Optimal Executions are purely in-memory operations

Low High
Optimal Optimal Total Execs Optimal Execs 1-Pass Execs M-Pass Execs
——- ——- ————– ————– ———— ————
2K 4K 426 426 0 0
64K 128K 3 3 0 0
512K 1024K 8 8 0 0
————————————————————-

PGA Memory Advisory DB/Inst: PAST01/past01 Snap: 8219
-> When using Auto Memory Mgmt, minimally choose a pga_aggregate_target value
where Estd PGA Overalloc Count is 0

Estd Extra Estd PGA Estd PGA
PGA Target Size W/A MB W/A MB Read/ Cache Overalloc
Est (MB) Factr Processed Written to Disk Hit % Count
———- ——- —————- —————- ——– ———-
24 0.1 34,432.9 12,717.5 73.0 1,149
48 0.3 34,432.9 12,596.6 73.0 1,119
95 0.5 34,432.9 2,571.6 93.0 77
143 0.8 34,432.9 1,736.6 95.0 15
191 1.0 34,432.9 1,701.5 95.0 0
229 1.2 34,432.9 1,369.8 96.0 0
267 1.4 34,432.9 1,117.5 97.0 0
305 1.6 34,432.9 1,062.1 97.0 0
343 1.8 34,432.9 935.6 97.0 0
381 2.0 34,432.9 935.6 97.0 0
572 3.0 34,432.9 935.6 97.0 0
763 4.0 34,432.9 935.6 97.0 0
1,144 6.0 34,432.9 935.6 97.0 0
1,526 8.0 34,432.9 935.6 97.0 0
————————————————————-

^LShared Pool Advisory DB/Inst: PAST01/past01 Snap: 8219
-> 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
———- —– ——– ———— ——- —— ——- —— ———–
272 .5 73 11,202 ####### 1.0 76,690 11.1 ###########
336 .6 131 13,875 ####### 1.0 16,668 2.4 ###########
400 .7 194 19,044 ####### 1.0 7,876 1.1 ###########
464 .8 255 24,348 ####### 1.0 6,931 1.0 ###########
528 .9 318 30,057 ####### 1.0 6,915 1.0 ###########
592 1.0 381 36,589 ####### 1.0 6,913 1.0 ###########
656 1.1 444 42,390 ####### 1.0 6,908 1.0 ###########
720 1.2 507 48,666 ####### 1.0 6,903 1.0 ###########
784 1.3 570 54,758 ####### 1.0 6,903 1.0 ###########
848 1.4 633 60,324 ####### 1.0 6,902 1.0 ###########
912 1.5 663 64,007 ####### 1.0 6,902 1.0 ###########
976 1.6 663 64,007 ####### 1.0 6,902 1.0 ###########
1,040 1.8 663 64,007 ####### 1.0 6,902 1.0 ###########
1,104 1.9 663 64,007 ####### 1.0 6,902 1.0 ###########
1,168 2.0 663 64,007 ####### 1.0 6,902 1.0 ###########
1,232 2.1 663 64,007 ####### 1.0 6,902 1.0 ###########
————————————————————-

SGA Target Advisory DB/Inst: PAST01/past01 Snap: 8219

SGA Target SGA Size Est DB Est Physical
Size (M) Factor Time (s) Reads
———- ———- ———— —————-
612 0.8 354,230 43,760,951
816 1.0 347,421 42,890,278
1,020 1.3 347,386 42,890,278
1,224 1.5 347,386 42,890,278
1,428 1.8 347,386 42,890,278
1,632 2.0 347,386 42,890,278
————————————————————-

Streams Pool Advisory DB/Inst: PAST01/past01 Snap: 8219

No data exists for this section of the report.
————————————————————-

Java Pool Advisory DB/Inst: PAST01/past01 Snap: 8219

No data exists for this section of the report.
————————————————————-

Buffer Wait Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LEnqueue Activity DB/Inst: PAST01/past01 Snaps: 8218-8219
-> only enqueues with waits are shown
-> Enqueue stats gathered prior to 10g should not be compared with 10g data
-> ordered by Wait Time desc, Waits desc

Enqueue Type (Request Reason)
——————————————————————————
Requests Succ Gets Failed Gets Waits Wt Time (s) Av Wt Time(ms)
———— ———— ———– ———– ———— ————–
TX-Transaction (row lock contention)
58 56 0 56 114 2,044.46
PR-Process Startup
38 38 0 2 83 41,350.00
————————————————————-

^LUndo Segment Summary DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Min/Max TR (mins) – Min and Max Tuned Retention (minutes)
-> STO – Snapshot Too Old count, OOS – Out of Space count
-> Undo segment block stats:
-> uS – unexpired Stolen, uR – unexpired Released, uU – unexpired reUsed
-> eS – expired Stolen, eR – expired Released, eU – expired reUsed

Undo Num Undo Number of Max Qry Max Tx Min/Max STO/ uS/uR/uU/
TS# Blocks (K) Transactions Len (s) Concurcy TR (mins) OOS eS/eR/eU
—- ———- ————— ——– ——– ——— —– ————–
1 3.2 8,231 0 4 120/120 0/0 0/0/0/0/0/0
————————————————————-

Undo Segment Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> Most recent 35 Undostat rows, ordered by Time desc

Num Undo Number of Max Qry Max Tx Tun Ret STO/ uS/uR/uU/
End Time Blocks Transactions Len (s) Concy (mins) OOS eS/eR/eU
———— ———– ———— ——- ——- ——- —– ————
24-Jan 19:56 529 1,371 0 4 120 0/0 0/0/0/0/0/0
24-Jan 19:46 525 1,339 0 4 120 0/0 0/0/0/0/0/0
24-Jan 19:36 520 1,365 0 4 120 0/0 0/0/0/0/0/0
24-Jan 19:26 513 1,342 0 4 120 0/0 0/0/0/0/0/0
24-Jan 19:16 521 1,365 0 4 120 0/0 0/0/0/0/0/0
24-Jan 19:06 549 1,449 0 4 120 0/0 0/0/0/0/0/0
————————————————————-

^LLatch Activity DB/Inst: PAST01/past01 Snaps: 8218-8219
-> “Get Requests”, “Pct Get Miss” and “Avg Slps/Miss” are statistics for
willing-to-wait latch get requests
-> “NoWait Requests”, “Pct NoWait Miss” are for no-wait latch get requests
-> “Pct Misses” for both should be very close to 0.0

Pct Avg Wait Pct
Get Get Slps Time NoWait NoWait
Latch Name Requests Miss /Miss (s) Requests Miss
———————— ————– —— —— —— ———— ——
AWR Alerted Metric Eleme 13,594 0.0 N/A 0 0 N/A
Consistent RBA 7,759 0.0 N/A 0 0 N/A
FAL request queue 76 0.0 N/A 0 0 N/A
FAL subheap alocation 76 0.0 N/A 0 0 N/A
FIB s.o chain latch 10 0.0 N/A 0 0 N/A
FOB s.o list latch 39 0.0 N/A 0 0 N/A
In memory undo latch 57,797 0.0 N/A 0 7,751 0.0
JS mem alloc latch 8 0.0 N/A 0 0 N/A
JS queue access latch 8 0.0 N/A 0 0 N/A
JS queue state obj latch 20,610 0.0 N/A 0 0 N/A
KMG MMAN ready and start 1,255 0.0 N/A 0 0 N/A
KMG resize request state 22 0.0 N/A 0 0 N/A
KTF sga latch 9 0.0 N/A 0 1,000 0.0
MQL Tracking Latch 0 N/A N/A 0 73 0.0
Memory Management Latch 44 0.0 N/A 0 1,244 0.0
OS process 325 0.0 N/A 0 0 N/A
OS process allocation 1,456 0.0 N/A 0 0 N/A
OS process: request allo 71 0.0 N/A 0 0 N/A
PL/SQL warning settings 3 0.0 N/A 0 0 N/A
SQL memory manager latch 1 0.0 N/A 0 1,230 0.0
SQL memory manager worka 82,537 0.0 N/A 0 0 N/A
Shared B-Tree 132 0.0 N/A 0 0 N/A
active checkpoint queue 5,758 0.0 N/A 0 0 N/A
active service list 6,300 0.0 N/A 0 1,140 0.0
archive control 65 0.0 N/A 0 0 N/A
archive process latch 1,306 0.0 N/A 0 0 N/A
begin backup scn array 743 0.0 N/A 0 0 N/A
cache buffer handles 12 0.0 N/A 0 0 N/A
cache buffers chains 1,531,075 0.0 0.7 0 2,596 0.0
cache buffers lru chain 34,429 0.0 1.0 0 422 0.0
channel handle pool latc 69 0.0 N/A 0 0 N/A
channel operations paren 17,236 0.0 N/A 0 0 N/A
checkpoint queue latch 49,900 0.0 0.7 0 8,766 0.0
client/application info 2 0.0 N/A 0 0 N/A
compile environment latc 12,491 0.0 N/A 0 0 N/A
dml lock allocation 42,716 0.0 0.0 0 0 N/A
dummy allocation 4 0.0 N/A 0 0 N/A
enqueue hash chains 117,642 0.0 0.3 0 1,404 0.1
enqueues 61,315 0.0 N/A 0 0 N/A
event group latch 38 0.0 N/A 0 0 N/A
file cache latch 90 0.0 N/A 0 0 N/A
hash table column usage 33 0.0 N/A 0 171 0.0
hash table modification 54 0.0 N/A 0 0 N/A
job_queue_processes para 57 0.0 N/A 0 0 N/A
kks stats 15 0.0 N/A 0 0 N/A
kmcptab latch 110 0.0 N/A 0 0 N/A
kmcpvec latch 0 N/A N/A 0 110 0.0
ksuosstats global area 249 0.0 N/A 0 0 N/A
ktm global data 19 0.0 N/A 0 0 N/A
kwqbsn:qsga 132 0.0 N/A 0 0 N/A
lgwr LWN SCN 8,445 0.1 0.0 0 0 N/A
library cache 261,487 0.0 2.0 0 0 N/A
library cache load lock 28 0.0 N/A 0 0 N/A
library cache lock 209,307 0.0 N/A 0 0 N/A
library cache lock alloc 40 0.0 N/A 0 0 N/A
library cache pin 88,014 0.0 N/A 0 0 N/A
library cache pin alloca 2 0.0 N/A 0 0 N/A
list of block allocation 573 0.0 N/A 0 0 N/A
loader state object free 3,342 0.0 N/A 0 0 N/A
messages 55,816 0.0 0.3 0 0 N/A
^LLatch Activity DB/Inst: PAST01/past01 Snaps: 8218-8219
-> “Get Requests”, “Pct Get Miss” and “Avg Slps/Miss” are statistics for
willing-to-wait latch get requests
-> “NoWait Requests”, “Pct NoWait Miss” are for no-wait latch get requests
-> “Pct Misses” for both should be very close to 0.0

Pct Avg Wait Pct
Get Get Slps Time NoWait NoWait
Latch Name Requests Miss /Miss (s) Requests Miss
———————— ————– —— —— —— ———— ——
mostly latch-free SCN 8,440 0.0 N/A 0 0 N/A
ncodef allocation latch 55 0.0 N/A 0 0 N/A
object queue header heap 12 0.0 N/A 0 0 N/A
object queue header oper 36,326 0.0 N/A 0 0 N/A
object stats modificatio 1 0.0 N/A 0 0 N/A
parallel query alloc buf 492 0.0 N/A 0 0 N/A
parameter table allocati 2 0.0 N/A 0 0 N/A
post/wait queue 11,510 0.0 N/A 0 7,581 0.0
process allocation 71 0.0 N/A 0 38 0.0
process group creation 69 0.0 N/A 0 0 N/A
qmn task queue latch 528 0.0 N/A 0 0 N/A
redo allocation 38,681 0.0 0.5 0 88,349 0.0
redo copy 0 N/A N/A 0 88,362 0.0
redo writing 31,697 0.0 0.8 0 0 N/A
resmgr:actses active lis 1 0.0 N/A 0 0 N/A
resmgr:schema config 1 0.0 N/A 0 0 N/A
row cache objects 12,389 0.0 N/A 0 0 N/A
sequence cache 63,574 0.0 N/A 0 0 N/A
session allocation 30,669 0.0 1.0 15 0 N/A
session idle bit 257,599 0.0 N/A 0 0 N/A
session state list latch 8 0.0 N/A 0 0 N/A
session switching 55 0.0 N/A 0 0 N/A
session timer 1,140 0.0 N/A 0 0 N/A
shared pool 8,477 0.2 57.1 535 0 N/A
shared pool sim alloc 2 0.0 N/A 0 0 N/A
shared pool simulator 6,517 0.0 N/A 0 0 N/A
simulator hash latch 30,800 0.0 N/A 0 0 N/A
simulator lru latch 29,707 0.0 N/A 0 897 0.0
slave class 2 0.0 N/A 0 0 N/A
slave class create 8 12.5 1.0 0 0 N/A
sort extent pool 88 0.0 N/A 0 0 N/A
state object free list 2 0.0 N/A 0 0 N/A
statistics aggregation 112 0.0 N/A 0 0 N/A
threshold alerts latch 168 0.0 N/A 0 0 N/A
transaction allocation 415 0.0 N/A 0 0 N/A
transaction branch alloc 55 0.0 N/A 0 0 N/A
undo global data 41,288 0.0 N/A 0 0 N/A
virtual circuit buffers 738,709 0.1 0.0 0 0 N/A
virtual circuit queues 312,136 0.0 0.0 0 0 N/A
virtual circuits 155,447 0.0 N/A 0 0 N/A
————————————————————-

^LLatch Sleep Breakdown DB/Inst: PAST01/past01 Snaps: 8218-8219
-> ordered by misses desc

Latch Name
—————————————-
Get Requests Misses Sleeps Spin Gets Sleep1 Sleep2 Sleep3
————– ———– ———– ———- ——– ——– ——–
virtual circuit buffers
738,709 619 9 610 0 0 0
virtual circuit queues
312,136 100 3 97 0 0 0
shared pool
8,477 17 970 1 0 0 0
cache buffers chains
1,531,075 10 7 3 0 0 0
session allocation
30,669 5 5 0 0 0 0
redo allocation
38,681 4 2 2 0 0 0
redo writing
31,697 4 3 1 0 0 0
cache buffers lru chain
34,429 3 3 0 0 0 0
checkpoint queue latch
49,900 3 2 1 0 0 0
enqueue hash chains
117,642 3 1 2 0 0 0
library cache
261,487 3 6 0 0 0 0
messages
55,816 3 1 2 0 0 0
slave class create
8 1 1 0 0 0 0
————————————————————-

^LLatch Miss Sources DB/Inst: PAST01/past01 Snaps: 8218-8219
-> only latches with sleeps are shown
-> ordered by name, sleeps desc

NoWait Waiter
Latch Name Where Misses Sleeps Sleeps
———————— ————————– ——- ———- ——–
cache buffers chains kcbnlc 0 8 0
cache buffers chains kcbget: pin buffer 0 1 0
cache buffers lru chain kcbzgws_1 0 3 0
checkpoint queue latch kcbklbc: Link buffer into 0 1 0
checkpoint queue latch kcbkllrba: compute lowest 0 1 0
enqueue hash chains ksqrcl 0 1 1
library cache kglScanDependency 0 6 0
messages ksarcv 0 1 1
redo allocation kcrfw_redo_gen: redo alloc 0 2 0
redo writing kcrfsr: rba scn pair 0 2 0
redo writing kcrfwcr 0 1 0
session allocation ksucrp 0 2 1
session allocation ksucri 0 1 1
session allocation ksuprc 0 1 1
session allocation ksuxds: not user session 0 1 1
shared pool kghdmp 0 947 0
shared pool kghalo 0 22 944
shared pool kghupr1 0 1 4
slave class create ksvcreate 0 1 0
virtual circuit queues kmcfsq 0 3 0
virtual circuits kmcgms: if called with non 0 4 0
virtual circuits kmcgms: if shared server 0 4 2
virtual circuits kmcmbf 0 1 2
————————————————————-

^LParent Latch Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

Child Latch Statistics DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSegments by Logical Reads DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

Segments by Physical Reads DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LSegments by Row Lock Waits DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

Segments by ITL Waits DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

Segments by Buffer Busy Waits DB/Inst: PAST01/past01 Snaps: 8218-8219

No data exists for this section of the report.
————————————————————-

^LDictionary Cache Stats DB/Inst: PAST01/past01 Snaps: 8218-8219
-> “Pct Misses” should be very low ( “Final Usage” is the number of cache entries being used

Get Pct Scan Pct Mod Final
Cache Requests Miss Reqs Miss Reqs Usage
————————- ———— —— ——- —– ——– ———-
dc_awr_control 66 0.0 0 N/A 2 1
dc_global_oids 8 0.0 0 N/A 0 33
dc_histogram_data 73 47.9 0 N/A 0 62,380
dc_histogram_defs 156 40.4 0 N/A 0 4,356
dc_object_ids

By: sandeep patra

sandeep patra — Wed, 27 Jan 2010 13:26:48 +0000

WORKLOAD REPOSITORY report for

DB Name DB Id Instance Inst Num Release RAC Host
———— ———– ———— ——– ———– — ————
PAST01 340786915 past01 1 10.2.0.2.0 NO vsl001a012

Cache Sizes
~~~~~~~~~~~ Begin End
———- ———-
Buffer Cache: 144M 144M Std Block Size: 8K
Shared Pool Size: 592M 592M Log Buffer: 30,744K

% Blocks changed per Read: 55.10 Recursive Call %: 20.48
Rollback per transaction %: 0.01 Rows per Sort: 7.56

Shared Pool Statistics Begin End
—— ——
Memory Usage %: 90.97 91.05
% SQL with executions>1: 99.16 99.12
% Memory for SQL w/exec>1: 90.60 90.75

Avg
%Time Total Wait wait Waits
Event Waits -outs Time (s) (ms) /txn
—————————- ————– —— ———– ——- ———
enq: TX – row lock contentio 249 77.5 589 2367 0.0
latch: shared pool 970 99.5 535 551 0.1
enq: PR – contention 29 93.1 81 2783 0.0
log file parallel write 7,758 .0 47 6 1.1
log file sync 7,579 .0 43 6 1.1
os thread startup 48 18.8 17 344 0.0
latch: session allocation 5 .0 15 3077 0.0
db file sequential read 1,944 .0 13 7 0.3
control file parallel write 1,250 .0 11 9 0.2
Log archive I/O 92 .0 6 66 0.0
log file sequential read 91 .0 4 48 0.0
SQL*Net message to client 84,675 .0 2 0 12.1
log file switch completion 2 .0 1 290 0.0
ksdxexeotherwait 4,148 100.0 0 0 0.6
SQL*Net more data from clien 4,587 .0 0 0 0.7
latch: library cache 6 .0 0 24 0.0
latch free 10 .0 0 14 0.0
control file sequential read 1,461 .0 0 0 0.2
direct path write 1,494 .0 0 0 0.2
log file single write 4 .0 0 5 0.0
SQL*Net break/reset to clien 2 .0 0 6 0.0
SGA: allocation forcing comp 11 .0 0 1 0.0
latch: cache buffers lru cha 3 .0 0 4 0.0
direct path read 315 .0 0 0 0.0
latch: checkpoint queue latc 2 .0 0 2 0.0
latch: redo allocation 2 .0 0 1 0.0
latch: cache buffers chains 7 .0 0 0 0.0
latch: messages 1 .0 0 2 0.0
LGWR wait for redo copy 11 .0 0 0 0.0
rdbms ipc reply 1 .0 0 1 0.0
latch: enqueue hash chains 1 100.0 0 1 0.0
latch: redo writing 3 .0 0 0 0.0
latch: virtual circuit queue 3 .0 0 0 0.0
virtual circuit status 56,849 .1 3,940 69 8.1
Streams AQ: qmn slave idle w 132 .0 3,626 27473 0.0
Streams AQ: qmn coordinator 273 51.6 3,626 13283 0.0
SQL*Net message from client 84,649 .0 3,458 41 12.1
————————————————————-