M_13_1.00 Performance Tuning With Demos and Labs 2012.pdf

7/27/2019 M_13_1.00 Performance Tuning With Demos and Labs 2012.pdf

1/12

Module 13:Performance Tuning


2/12

Overview

Performance tuning methodologies

Instance level

Database level

Application levelOverview of tools and techniques for performanceanalysis and tuning


3/12

Tuning Methodologies Tuning While Building

The Tuning While Building methodology offers aproactive approach to performance tuning

These are the steps:

1. Tune the business rules

2. Tune the data design

3. Tune the application

4. Tune the instance

5. Tune the underlying platform


4/12

Tuning Methodologies Performance Tuning

Performance tuning is an ongoing, interactive processPerformance Improvement Method offers steps inimproving performance of a system in production:

Define the problem

Examine the host system and the Oracle statistics

Examine documentation to help identify the problem

Generate a prognosis based on captured data

Propose a course of action and implement the changes

Evaluate the effects of the changes

If unsuccessful, repeat previous two steps


5/12

Application Tuning

Tune Application Design Leverage RDBMS features Example: Perform calculations and summaries on the database

before fetching the results so as to leverage database resources aswell as to reduce network traffic

Tune Logical Structure of Database Leverage supporting schemaobjects

Example: choose appropriate indexes

Tune Database Operations

Find statements that consume most resources Use statisticsavailable in system catalog, such as parses, CPU time, physical

reads Tune the statements to use fewer resources Use coding

standards and tools to analyze and tune SQL

Tune Access Paths Aid Optimizer in finding optimal access path,creating indexes, clustered indexes, and providing optimizer hints


6/12

Tune Memory Allocation

Proper configuration and use of the caches that make up

the SGA (Oracle) and memory pool (SQL Server)

Tune I/O and Physical Structures

Separation of files based on access

Distribution of I/O load across files and devices

Tune Resource Contention

Reduce and/or eliminate contention for locks, latches,

block (page) headers, and queues

Instance Tuning


7/12

SQL Server Performance Tuning Tools

Profiler records detailed information on activity on the database server,

including I/O statistics, CPU statistics, index and table scans, executionplans and several other statistics to aid in tuning SQL and T-SQL

Distributed Replay assess impact of hardware and OS upgrades and SQLServer tuning

Performance Data Collector fully integrated tool that collects a variety ofperformance metrics on one or more SQL Servers and stores the data in a

central data warehouse

Build custom reports showing trends

Query Editor in SSMS graphical tool used to execute and debug queriesto resolve performance issues

Database Engine Tuning Advisor database physical design tool to

optimize indexes and partitioning

Performance MonitorWindows tool that records counters at hardware,operating system, database, and application levels

Task Manager used for initial review of high-level counters on thesystem, including utilization at a process level


8/12

Demonstration: Data Compression

In this demonstration you will learn to:

Use the Compression Wizard to benefitfrom ROW or PAGE type options.

Understand how to calculate

compression savings with the wizard orwith scripts

Implement compression with the wizardor with scripts.


9/12

Demonstration: SQL Server Profiler

In this demonstration you will learn to:

Use the SQL Server Profiler to captureevents within SQL Server as it is beingused.

Choose the type of events to monitor

Generate script templates for traces.


10/12

Demonstration: Hints (T-SQL)

In this demonstration you will learn to:Enforce a HASH JOIN in a query.

Benefit from the OPTIMIZE FOR hint.

Override the row locking default with aTABLOCK hint.

Remove all shared locks with theNOLOCK hint.


11/12

Demonstration: Plan Guides

In this demonstration you will learn to:Override an existing query with a PlanGuide.

Use the SQL Server 2012 interface to

implement Plan Guides.


12/12

Review

We learned performance tuning methodologies, including TuningWhile Building to be used starting with application design processand Performance Improvement Method to be used to tuneproduction systems

We discussed steps in tuning an application, including tuningapplication design, access paths, logical structure, and operationsat the database

We went over steps in tuning an instance, including tuning memoryallocation, resource contention, and I/O and physical structures

We were introduced to a set of tools available in SQL Server andMicrosoft Windows that aid in tuning at hardware, operating system,database, and application levels ,and achieving overall optimalperformance

M_13_1.00 Performance Tuning With Demos and Labs 2012.pdf

Documents