Mesure - Six Sigma project - Database performance Improvement by Nirav Shah

1. 1.
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Nirav Shah (GB)
Improve UATIMNG
database performance
Dushyant Mohanty (TCS - sponsor)
V, Ms. Vijayalakshmi (MBB)
Nilesh Talele (BB)
Pierre Banroques (GE - sponsor)

2. 2.
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CTQ/Project Y MatrixMeasure
Step 1
Potential Project Y Metrics
CTQ Output Characteristic
Strong relationship Moderate relationship Weak relationship⊗ No relationship
⊗
QueryExecutionTimeChained rows
Oracle Flexible Architecture
⊗

3. 3.
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Performance StandardsMeasure
Step 2
CTQ Project Y
Metric
Target Tolerance Unit Opportunity Defect
Definition
Query
Execution
Time
iManage Reports
Response Time
< = 60 s + 10 s Each Sample
Query
Total Number of
Sample Queries
used.
Any sample
Query response
time exceeding
70 secs

4. 4.
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Data Collection Purpose
What to Measure
How to Measure
Sampling Plan (Scheme, Frequency, Size)
Avg time for 4 sample queries will be measured daily.
Using Stop watch
Finding sample queries and the time response on the uatimng database and reduce the
response time on the UATIMNG database.
Data Collection PlanMeasure
Step 3
Query Execution Time
Data Collection Plan & Data Collected
Data Collection

5. 5.
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Through statspack report it is observed on UATIMNG database, db file sequential read as top
time consuming. statspack report attached .
Data CollectionMeasure
Step 3
Row Chaining:
File sequential read:
statpack Report
Row Chaining Data

6. 6.
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Steps to perform MSA
MSA Findings
Gage R and R is performed to find out the Reproducibility and Repeatability of the
measurement. Gage R & R Work Sheet is attached below.
1) Data collection Goal : To find the Query Execution Time.
2) Plan to measure all Measurable CTQ : A Total set of 4 queries will be run on the
database and the average Time elapsed for all the 4 queries will be found. Measure
Chained rows on the tables and db_file_sequencial_read on database.
3) Gage R & R to be performed to calculate Repeatability and Reproducibility of
Measurement System.
Measurement Systems AnalysisMeasure
Step 3
R & R Measure

7. 6.
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Steps to perform MSA
MSA Findings
Gage R and R is performed to find out the Reproducibility and Repeatability of the
measurement. Gage R & R Work Sheet is attached below.
1) Data collection Goal : To find the Query Execution Time.
2) Plan to measure all Measurable CTQ : A Total set of 4 queries will be run on the
database and the average Time elapsed for all the 4 queries will be found. Measure
Chained rows on the tables and db_file_sequencial_read on database.
3) Gage R & R to be performed to calculate Repeatability and Reproducibility of
Measurement System.
Measurement Systems AnalysisMeasure
Step 3
R & R Measure