Toad® Database Administration
Best Practices
Presenter
Copyright © 2006 Quest Software
Production Database Pressure Points
Shrinking
Batch
Windows
Increased
User Activity
End Users
Developers
Application
Changes
Production
Database
develop
Platform
Changes
upgrade
Diagnostics and
Optimization
DBAs
What is “Best Practice” ?
• A set of guiding principles proposed by industry leading experts
• Acknowledgement that the application is part of an evolving
lifecycle which will continue to iterate over a period of time
• Determination to deliver a quality product or what we used to call
“taking pride in your work” !
Why use it ?
Administration Best Practices
Toad Database Administration Best Practices
Oracle
SQL Server
DB2
Challenges to implementing Best Practice
•
Resistance to use tools
•
Already have scripts
•
Yada yada….
Design
• Access to data
model
– Ensures
development
matches
business
requirements
– Ensures data
model is
correctly
optimized
– Ensures model
integrity is
maintained
– Version history
Deploy (1)
•
•
•
•
DDL Scripts automatically generated from data model
Alter Script generation based on data model updates
Version History retained for auditing
Application scalability testing
Deploy (2)
• Will the application work correctly and adequately under
production conditions ?
SQL statement or
PL/SQL code scalability
profile
Does not scale well
Scales well
Detect/Discover
• Environment (O/S and Database)
– Instance Manager
– UNIX Monitor
– Windows Service Manager
• Instance Performance
– Database Browser (all instances)
– Database Monitor
– Database Probe
• SQL Performance
– SQL Trace/Optimization
– ASH Report
– Index Monitoring
– Database Browser (all instances)
– Database Monitor
– Oracle Alert Log analysis
(FTP and Telnet windows)
– Database Health Check
– Session Browser
– ADDM/AWR
– StatsPack
– Top Session Finder
– SQL Monitor
– SQL Scan/SQL Detective
(Xpert/Dev Suite)
• Space Management
– Database Browser
– Segment Advisor
– Space/IO History
– Undo Advisor
Diagnose
• Instance Performance
–
–
–
–
Database Probe
Database Monitor
Session Browser
Health Check
– Undo Advisor
• SQL Performance
–
–
–
–
Top Session Finder
SQL Trace/Optimization
Session Browser
SQL Optimization (Xpert or Dev Suite)
• Space Management
–
–
–
–
Segment Advisor
Tablespace Map
Identify Space Deficits
Log Switch Frequency Map
Resolve
• Instance Performance
– Oracle Parameters
• Schema/Data Integrity
–
–
–
–
Log Miner (access to Undo SQL)
Schema Compare
Data Compare
Data Duplicates
- Flashback Table
• SQL Performance
– Explain Plan
– SQL Optimization (Xpert or Dev Suite)
• Space Management
–
–
–
–
–
Rebuild Multiple Objects
Analyze Objects
Repair Chained Rows
Segment Shrink Advisor
DBMS Redefinition Wizard
SQL Optimization - How hard can it be to rewrite SQL ?
How many different ways can you
write this query?
Teach Yourself SQL in
30,420 Minutes
By Gabriel F. Gargiulo
SELECT EMP_NAME,DPT_NAME,GRD_DESC
FROM EMPLOYEE,
DEPARTMENT DEPARTMENT1,
GRADE
WHERE EMP_GRADE = GRD_ID
AND EMP_DEPT = DPT_ID
AND EXISTS (SELECT 'X'
FROM DEPARTMENT DEPARTMENT2
WHERE DPT_AVG_SALARY IN (SELECT
MIN(DPT_AVG_SALARY)
FROM DEPARTMENT DEPARTMENT3)
AND DPT_ID = EMPLOYEE.EMP_DEPT);
30,491 !!!
Optimize SQL
• Proactively identify
problematic SQL directly
from the source code
• Thorough transformation
of SQL producing every
possible semantically
equivalent rewrite
• Optimize SQL in batch in
context of source code
• Generate replacement
script
• Automatic ranking of best
alternatives
• Minimal involvement which
can save hours of time
Inform
• Instance Performance
– ADDM/AWR
– StatsPack
– Health Check Report (schedulable)
• Schema Integrity
–
–
–
–
–
Schema Compare
HTML Schema Report (schedulable)
Reports Manager (schedulable)
ER Diagram (Toad Data Modeler)
Master-Detail Browser
• SQL Performance
– Plan Change Analyzer (Xpert or Dev Suite)
• Space Management
– Tablespace History
– IO History
Administer
• Instance
–
–
–
–
ASM Manager
Oracle Parameters
Redo Log Manager
Schema Browser (Rollback Segment, Jobs, Scheduler)
• Schema Integrity
– Object Audit
– NLS Parameters
– Export & Import
– DBMS Flashback
– Recycle Bin
• Space Management
– Schema Browser (Tablespaces)
– Tablespace Menu
• Users
– Audit SQL / Sys Privs
– Schema Browser (Users, Roles, Object Privs, etc)
TOAD DB Optimization Check-List