Oracle AWR

1© Copyright 2010 EMC Corporation. All rights reserved.

Oracle AWRPrepared For: XYZ Corp

Data Collected on 2011-09-07


Agenda

• This Storage Assessment is organized in the following sections:

– Introduction– Summary– IO and Load Details– IO and Load Details by Instance (if RAC)– Top 10 Tablespaces– Top 10 Wait Events – IO and Non-IO Related– Burst Analysis

• The following additional files were provided:– Details.xlsx: Additional information to provide further

detail


Introduction - Methodology

• The disk estimates in this report are calculated by analyzing the RAID-adjusted IOPS (read + write) and estimating the number of required spindles to sustain the workload. These sizing estimates use EMC's ratings for sustained IOPS, not burst, for each drive speed.

• These estimates are performance based estimates based on the sample data supplied. These estimates do not consider database capacity, capacity growth or specific EMC array capabilities. These estimates make up one part of the recommended EMC architecture.

• This analysis does not include additional spindles required for standard best-practice database components, such as redo, archive logs, backups to disk, replication and clones.


Introduction - Drive Calculations

• For RAID-5 and RAID-10 adjusted IOPs– RAID-5 Adjusted IOPS=Physical read IO requests per second +

4*(Physical write IO requests per second + Redo writes per second)– RAID-10 Adjusted IOPS=Physical read IO requests per second +

2*(Physical write IO requests per second + Redo writes per second)

• Note: the metrics used for RAID adjusted IOPs exclude archive log, RMAN backup or restore, and Flashback database IOPs. RAID-5 or RAID-6 10k RPM or 7200 RPM RAID groups or pools are usually sufficient for the sequential IOPs generated by these processes

• For the RAID-5 and RAID-10 drive counts, the relevant adjusted RAID IOPs figure is divided by the IOPs rating for each drive type: 180 IOPs for 15k RPM and 2500 IOPs for EFDs.


Introduction - Additional Calculations• The following calculations are used throughout this report

– % Physical Read IO to Total IO = 100 * Physical read IO requests per second / (Physical read IO requests per second + Physical write IO requests per second + Redo writes per second)

– % Percentage physical reads to logical (total) reads = 100*(physical reads per sec / logical reads per sec). These are Oracle data block reads, not read IO calls.

– Read Bandwidth (MB/sec) = Physical reads total bytes per second / (1024*1024)

– Write Bandwidth (MB/sec) = Physical writes total bytes per second / (1024*1024)

• Note: This report shows both 95th percentiles and peak values. When less than 20 samples (AWR reports) are provided, 95th percentile will be mathematically equivalent to the peak value.


Input Summary

Database Name

Instance Host Software Version

RAC Start Date End Date # Files Analyzed

Default Block Size

(KB)

xyz xyz1 host01 Oracle 10.2.0.4.0

YES 2011-09-06 00:00

2011-09-07 00:00

96 8


YES 2011-09-06 00:00

2011-09-07 00:00

96 8


YES 2011-09-06 00:00

2011-09-07 00:00

96 8


IOPS and Drive Estimates

Metric IOPS Required EFD Devices Required 15K Spindles

RAID-10 Adjusted IOPS - Peak 11,165 5 63

RAID-5 Adjusted IOPS - Peak 12,717 6 71

RAID-10 Adjusted IOPS - 95th 9,569 4 54

RAID-5 Adjusted IOPS - 95th 11,918 5 67

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,0004,0006,0008,000

10,00012,00014,000

RAID-5 IOPS RAID-10 IOPS

IOP

S

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

20

40

60

80RAID-5 15k # Drives RAID-10 15k # Drives

# D

rives


IOPS and Drive Estimates By Instance

Name RAID-10 IOPS - max RAID-5 IOPS - max RAID-10 15k # Drives - max RAID-5 15k # Drives - max

xyz:xyz1 5,270 5,978 29.28 33.21

xyz:xyz2 3,605 5,582 20.03 31.01

xyz:xyz3 3,397 3,814 18.87 21.19

These maximums may occur at different times and should not be added to get a total drive estimate.


RAID Adjusted IOPS

9/6/2011 9/6/20110

1,000

2,000

3,000

4,000

5,000

6,000

xyz:xyz1 xyz:xyz2 xyz:xyz3

RA

ID-1

0 I

OP

S

9/6/2011 9/6/20110

1,000

2,000

3,000

4,000

5,000

6,000

7,000

xyz:xyz1 xyz:xyz2 xyz:xyz3

RA

ID-5

IO

PS


System Summary

Metric Value Comments

# Databases 1 database 3 instances

Database Name xyz Instances: xyz1, xyz2, xyz3

Database Version 10.2.0.4.0

RAID-10 Estimated # 15K Drives 63 (54) Peak (95th)

RAID-5 Estimated # 15K Drives 71 (67) Peak (95th)

RAID-10 Estimated # EFD Drives 5 (4) Peak (95th)

RAID-5 Estimated # EFD Drives 6 (5) Peak (95th)

RAID-10 Adjusted IOPS 11165 (9569) Peak (95th)

RAID-5 Adjusted IOPS 12717 (11918) Peak (95th)

Physical Reads/Total Physical IO 89% (100%) Average (Peak)

Physical Reads/Logical Reads 10% (37%) Average (Peak)

Read Bandwidth (MB/sec) 346 Peak Value

Write Bandwidth (MB/sec) 51 Peak Value


IO and Load Details


Database Workload(IOPS)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,000

4,000

6,000

8,000

10,000

12,000

Phys Read IOs/sec Phys Read IOs/sec - 95th

Phys R

ead I

Os/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

200

400

600

800

1,000

1,200

Phys Write IOs/sec Phys Write IOs/sec - 95th

Phys W

rite

IO

s/s

ec


Database Workload(Redo)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

100

200

300

400

500

600

700

Redo W

rite

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,000,000

4,000,000

6,000,000

8,000,000

10,000,000

12,000,000

14,000,000

Redo B

yte

s/s

ec


Physical Read Percentages

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead I

O/T

ota

l IO

%

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead/L

ogic

al

Read %


Database Bandwidth

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50

100

150

200

250

300

350

400

Physical Read Total MB/sec Physical Write Total MB/sec

MB

/sec


Transactions, Executes and User Calls

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

1,0002,0003,0004,0005,0006,000

Tra

nsacti

ons/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,0004,0006,0008,000

10,00012,00014,000

Execute

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

5,000

10,000

15,000

20,000

25,000

User

Calls/s

ec


IO and Load Details by Instance


Instance Workload(IOPS) (xyz:xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

1,000

2,000

3,000

4,000

5,000

6,000


Phys R

ead I

Os/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50100150200250300350400450


Phys W

rite

IO

s/s

ec


Instance Workload(Redo) (xyz:xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50

100

150

200

250

Redo W

rite

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

1,000,0002,000,0003,000,0004,000,0005,000,0006,000,0007,000,0008,000,0009,000,000

10,000,000

Redo S

ize/s

ec


Instance Workload(IO Ratios) (xyz:xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead I

O/T

ota

l IO

%

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead/L

ogic

al

Read %



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

500

1,000

1,500

2,000

2,500

3,000


Phys R

ead I

Os/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

100

200

300

400

500

600

700


Phys W

rite

IO

s/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50100150200250300350400450

Redo W

rite

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

1,000,0002,000,0003,000,0004,000,0005,000,0006,000,0007,000,0008,000,0009,000,000

10,000,000

Redo S

ize/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead I

O/T

ota

l IO

%

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead/L

ogic

al

Read %



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

500

1,000

1,500

2,000

2,500

3,000

3,500


Phys R

ead I

Os/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50

100

150

200

250

300


Phys W

rite

IO

s/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

10

20

30

40

50

60

70

Redo W

rite

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

Redo S

ize/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead I

O/T

ota

l IO

%

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

102030405060708090

100

Physic

al R

ead/L

ogic

al

Read %


Instance Bandwidth (xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

20

40

60

80

100

120

140


MB

/sec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

50

100

150

200

250

300

350


MB

/sec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

10

20

30

40

50

60

70

80

90


MB

/sec


Transactions, Executes and User Calls by Instance (xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

500

1,000

1,500

2,000

Tra

nsacti

ons/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

5001,0001,5002,0002,5003,0003,500

Execute

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,000

4,000

6,000

8,000

10,000

User

Calls/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

5001,0001,5002,0002,5003,000

Tra

nsacti

ons/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,000

4,000

6,000

8,000

Execute

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,0004,0006,0008,000

10,00012,00014,000

User

Calls/s

ec



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

200

400

600

800

Tra

nsacti

ons/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

2,0004,0006,0008,000

10,00012,000

Execute

s/s

ec

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:360

500

1,000

1,500

2,000

User

Calls/s

ec


Oracle Host CPU Utilization (xyz:xyz1)






Tablespaces


Tablespaces

• Oracle tablespaces are logical containers holding various database segments, such as of tables, indices or their partitions, undo or rollback, system meta-data, and temporary sort area.

• Underlying a tablespace are one or more files or devices

• IO contention is indicated where tablespaces are showing average read times in milliseconds (Av Rd(ms)) equal to or greater than 20 milliseconds, though with modern array caching, 10 milliseconds or more is becoming the indicator of IO contention.

• EFDs show their best performance gains with small-block random-read OLTP-like workloads. See Blocks Per Read for read size, where a block is an Oracle data block. The default Oracle data block size is on the Input Summary slide.

• Databases showing IO contention via high values for Av Rd ms and showing small block random reads (8-16KB) via Blocks per Read, in conjunction with the database block size, are ideal candidates for EFDs.


Tablespace Metrics at IO Peak (xyz1)

Start Date Tablespace # Reads Read IOPS Avg Rd (ms) Blocks per Read # Writes Write IOPS

2011-09-06 10:30 XYZ_DOC570_LOB 4,238,561 4685 0 1 3,959 4

2011-09-06 10:30 XYZ_DOC450_DATA 220,228 243 8 1 1 0

2011-09-06 10:30 XYZ_DOC543_LOB 43,664 48 0 1 11,392 13

2011-09-06 10:30 XYZ_DOC543_DATA 28,618 32 6 13 12,076 13

2011-09-06 10:30 XYZ_DOC570_DATA 11,118 12 11 1 763 1

2011-09-06 10:30 XYZ_DOC570_INDEX 6,684 7 11 1 1,347 1

2011-09-06 10:30 TEMP_DATA 4,029 4 0 1 3,916 4

2011-09-06 10:30 XYZ_DOC631_DATA 5,180 6 0 1 2 0

2011-09-06 10:30 XYZ_DOC543_RS0001_LOB 3,367 4 0 1 3 0

2011-09-06 10:30 XYZ_DOC593_DATA 1,935 2 10 1 17 0



Start Date Tablespace # Reads Read IOPS Avg Rd (ms) Blocks per Read # Writes Write IOPS

2011-09-06 10:30 XYZ_DOC560_LOB 930,361 1028 0 1 168 0

2011-09-06 10:30 TEMP_DATA 282,875 313 0 1 61,229 68

2011-09-06 10:30 XYZ_DOC676_LOB 428 0 0 1 258,583 286

2011-09-06 10:30 XYZ_DOC675_LOB 214,226 237 0 1 493 1

2011-09-06 10:30 XYZ_DOC669_INDEX 74,424 82 8 1 104,086 115

2011-09-06 10:30 XYZ_DOC675_DATA 91,328 101 5 1 2,391 3

2011-09-06 10:30 XYZ_DOC675_INDEX 52,540 58 9 1 19,560 22

2011-09-06 10:30 XYZ_DOC631_LOB 56,325 62 2 1 0 0

2011-09-06 10:30 XYZ_DOC560_INDEX 32,986 36 6 1 16,814 19

2011-09-06 10:30 XYZ_DOC543_RS0001_DATA 37,767 42 7 1 1 0



Start Date Tablespace # Reads Read IOPS Avg Rd (ms) Blocks per Read

# Writes Write IOPS

2011-09-06 10:30 XYZ_DOC508_DATA 1,521,133 1681 2 2 2 0

2011-09-06 10:30 XYZ_DOC631_DATA 164,303 182 1 5 0 0

2011-09-06 10:30 XYZ_DOC661_DATA 89,173 99 3 1 76 0

2011-09-06 10:30 XYZ_DOC570_LOB 40,605 45 0 1 5,462 6

2011-09-06 10:30 XYZ_DOC543_RS0001_DATA 38,016 42 6 1 61 0

2011-09-06 10:30 XYZ_DOC675_INDEX 18,486 20 6 1 2,393 3

2011-09-06 10:30 XYZ_DOC661_LOB 15,466 17 0 1 3,049 3

2011-09-06 10:30 XYZ_DOC543_LOB 11,779 13 1 1 3,169 4

2011-09-06 10:30 XYZ_DOC661_DOC661_DATA 14,231 16 5 1 531 1

2011-09-06 10:30 XYZ_DOC675_DATA 12,411 14 5 1 1,208 1


Top 10 Tablespaces (by Total IOs) (xyz1)

9/6/2011 9/6/2011 9/7/20110

1,000

2,000

3,000

4,000

5,000XYZ_DOC570_LOB XYZ_DOC543_DATA XYZ_DOC629_INDEXTEMP_DATA XYZ_DOC629_DATA XYZ_DOC450_DATAXYZ_DOC543_LOB XYZ_DOC543_RS0001_DATA XYZ_DOC516_DATAXYZ_DOC614_DATA

Read +

Wri

te

IOP

S

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

Avg R

d (

ms)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

Blo

cks p

er

Read

Due to the changing locality of database activity, the listed tablespaces can show discontinuities.



9/6/2011 9/6/2011 9/7/20110

500

1,000

1,500

2,000

2,500XYZ_DOC636_DATA XYZ_DOC644_DATA TEMP_DATA XYZ_DOC669_INDEXXYZ_DOC490_DATA XYZ_DOC630_DATA XYZ_DOC644_LOB XYZ_DOC516_DATAXYZ_DOC644_INDEX XYZ_DOC508_DATA

Read +

Wri

te

IOP

S

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

Avg R

d (

ms)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

Blo

cks p

er

Read



9/6/2011 9/6/2011 9/7/20110

500

1,000

1,500

2,000

2,500XYZ_DOC490_DATA XYZ_DOC508_DATA TEMP_DATA XYZ_DOC521_DATAXYZ_DOC570_LOB XYZ_DOC543_DATA XYZ_DOC644_LOB XYZ_DOC629_DATAXYZ_DOC614_DATA XYZ_DOC629_INDEX

Read +

Wri

te

IOP

S

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

Avg R

d (

ms)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:0005

101520253035

Blo

cks p

er

Read


Top Wait Events


Wait Events

• The wait events analyzed here are from the Top 5 Timed/Waited Events section of the AWR reports.

• Response time can be thought of as the sum of service time, i.e. CPU time, plus wait time.

• Gaps indicate that an event was not in the Top 5 for a particular sample.

• Oracle uses the terms sequential and scattered to mean the opposite. "Sequential" implies random IOs, and "scattered" implies sequential IOs.

• Use these slides to evaluate indicators of IO contention, as well as suitability for EFDs.

• EFDs show their best performance gains with random read IOs, indicated as "sequential reads". EFDs show good to moderate gains with sequential read IOs, indicated as "scattered reads".

• The column '% Total Call Time' represents the percentage of time during processing an Oracle process was waiting on this IO related wait event and 'Av Wait MS' is the average process wait time in milliseconds.


Wait Events(IO) (xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

25

30

System I/O:control file sequential read User I/O:db file sequential readUser I/O:direct path read User I/O:db file scattered readCommit:log file sync System I/O:log file parallel writeUser I/O:db file parallel read User I/O:direct path read tempSystem I/O:log file sequential read User I/O:direct path write

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

102030405060708090

100

% T

ota

l C

all T

ime

Extracted from the "Top 5 Timed Events" section of AWR/StatsPack report.


Wait Events(Non-IO) (xyz1)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

100

200

300

400

500

600

Other:enq: WF - contention Cluster:gc cr disk readCluster:gc cr grant 2-way Cluster:gc cr multi block requestOther:reliable message Cluster:gc current block 3-wayOther:PX Deq Credit: send blkd Network:SQL*Net more data to clientOther:enq: TX - contention Applicatio:enq: TX - row lock contentionApplicatio:enq: TM - contention Concurrenc:enq: TX - index contention

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

102030405060708090

100

% T

ota

l C

all T

ime



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

10

20

30

40

50

60

70

80

System I/O:control file sequential read System I/O:db file parallel writeUser I/O:db file sequential read System I/O:RMAN backup & recovery I/OSystem I/O:log file parallel write User I/O:direct path readUser I/O:Data file init write User I/O:db file scattered readUser I/O:direct path write User I/O:direct path read tempUser I/O:direct path write temp Commit:log file sync

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

50

100

150

200

250

300

350

% T

ota

l C

all T

ime



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

100

200

300

400

500

600

Cluster:gc cr disk read Other:change tracking file synchronoOther:DFS lock handle Other:enq: CF - contentionOther:PX Deq Credit: send blkd Cluster:gc cr multi block requestOther:enq: WF - contention Other:reliable messageApplicatio:enq: TX - row lock contention Cluster:gc buffer busyOther:enq: TS - contention

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

102030405060708090

100

% T

ota

l C

all T

ime



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

5

10

15

20

25

System I/O:control file sequential read User I/O:db file sequential readUser I/O:direct path read User I/O:db file scattered readUser I/O:direct path read temp User I/O:direct path write tempUser I/O:read by other session System I/O:log file parallel writeSystem I/O:log file sequential read User I/O:db file parallel read

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

102030405060708090

100

% T

ota

l C

all T

ime



0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

500

1,000

1,500

2,000

2,500

Cluster:gc cr disk read Other:enq: WF - contention Other:change tracking file synchronoOther:reliable message Cluster:gc current block 2-way Cluster:gc cr grant 2-wayOther:PX Deq Credit: send blkd Other:PX Deq: Table Q Get Keys Cluster:gc cr multi block requestCluster:gc current block busy Cluster:gc cr block 2-way Concurrenc:cursor: pin S wait on XConcurrenc:library cache lock Other:gcs log flush sync Other:cr request retry

Avg W

ait

(m

s)

0:00 2:24 4:48 7:12 9:36 12:00 14:24 16:48 19:12 21:36 0:000

102030405060708090

100

% T

ota

l C

all T

ime


Burst Analysis


Peak BurstPeak IO event was 2011-09-06 10:30 to 10:50. +-6 samples is

09:00 thru 12:20


Burst by Instance

9/6/2011 9:00:00 9/6/2011 10:12:00 9/6/2011 11:24:000

1,000

2,000

3,000

4,000

5,000

6,000

xyz1 xyz2 xyz3

Phys I

Os/s

ec


Top 5 Tablespaces during Peak Burst

9/6/2011 9:00:00 9/6/2011 10:12:00 9/6/2011 11:24:000

1,000

2,000

3,000

4,000

5,000XYZ1:PM_DOC450_DATA XYZ1:PM_DOC570_LOB XYZ2:PM_DOC636_DATAXYZ3:PM_DOC508_DATA XYZ2:PM_DOC630_DATA

Read +

Wri

te

IOP

S

9:00 9:28 9:57 10:26 10:55 11:24 11:520.00

2.00

4.00

6.00

8.00

10.00

Avg R

d (

ms)

9:00 9:28 9:57 10:26 10:55 11:24 11:5205

101520253035

Blo

cks p

er

Read


Wait Events during Burst(IO) (xyz1)

9:00 9:28 9:57 10:26 10:55 11:24 11:520123456789

10

System I/O:control file sequential read User I/O:db file scattered readUser I/O:db file sequential read User I/O:direct path readSystem I/O:log file parallel write User I/O:direct path read tempCommit:log file sync

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:24 11:520

102030405060708090

100

System I/O:control file sequential read User I/O:db file scattered readUser I/O:db file sequential read User I/O:direct path readSystem I/O:log file parallel write User I/O:direct path read tempCommit:log file sync

% T

ota

l C

all T

ime


Wait Events during Burst(Non-IO) (xyz1)

9:00 9:28 9:57 10:26 10:55 11:240

100

200

300

400

500

600

Cluster:gc cr disk read Other:PX Deq Credit: send blkdNetwork:SQL*Net more data to client Other:enq: TX - contentionApplicatio:enq: TX - row lock contention Applicatio:enq: TM - contention

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:240

102030405060708090

100

Cluster:gc cr disk read Other:PX Deq Credit: send blkdNetwork:SQL*Net more data to client Other:enq: TX - contentionApplicatio:enq: TX - row lock contention Applicatio:enq: TM - contention

% T

ota

l C

all T

ime



9:00 9:28 9:57 10:26 10:55 11:24 11:520

1

2

3

4

5

6

7

8

System I/O:control file sequential read User I/O:db file sequential readUser I/O:direct path write User I/O:direct path readCommit:log file sync System I/O:log file parallel writeUser I/O:db file scattered read User I/O:direct path read temp

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:24 11:520

102030405060708090

100

System I/O:control file sequential read User I/O:db file sequential readUser I/O:direct path write User I/O:direct path readCommit:log file sync System I/O:log file parallel writeUser I/O:db file scattered read User I/O:direct path read temp

% T

ota

l C

all T

ime



9:00 9:28 9:57 10:26 10:55 11:24 11:520

100

200

300

400

500

600

Other:reliable message Applicatio:enq: TX - row lock contentionCluster:gc buffer busy

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:24 11:520

102030405060708090

100

Other:reliable message Applicatio:enq: TX - row lock contentionCluster:gc buffer busy

% T

ota

l C

all T

ime



9:00 9:28 9:57 10:26 10:55 11:24 11:520

2

4

6

8

10

12

14

User I/O:db file sequential read User I/O:direct path read User I/O:direct path read tempUser I/O:read by other session User I/O:db file scattered read System I/O:log file parallel write

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:24 11:520

102030405060708090

100

User I/O:db file sequential read User I/O:direct path read User I/O:direct path read tempUser I/O:read by other session User I/O:db file scattered read System I/O:log file parallel write

% T

ota

l C

all T

ime



9:00 9:28 9:57 10:26 10:55 11:24 11:520

50100150200250300350400450

Other:PX Deq Credit: send blkd Cluster:gc current block busyOther:enq: WF - contention Cluster:gc cr grant 2-way

Avg W

ait

(m

s)

9:00 9:28 9:57 10:26 10:55 11:24 11:520

102030405060708090

100

Other:PX Deq Credit: send blkd Cluster:gc current block busyOther:enq: WF - contention Cluster:gc cr grant 2-way

% T

ota

l C

all T

ime

Documents

Oracle AWR