IBM® DB2® for i
7.1: DBA Tools with IBM i Navigator
Linda M Swan (lmswan@us.ibm.com)
DB2 for i Query Optimizer team
DB2 for i – Explaining the technology
•
Enhancements delivered by PTF are documented here:
www.ibm.com/developerworks/ibmi/techupdates/db2
•
Some InfoCenter books, including the 7.1 SQL Reference, are updated on the
same TR cadence:
http://pic.dhe.ibm.com/infocenter/iseries/v7r1m0/topic/db2/rbafz.pdf
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The “IBM i 7.1 Technical Overview” Redbook gets updated with database
enhancements:
http://www.redbooks.ibm.com/abstracts/sg247858.html
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We publish deep dive White Papers on some topics:
HTTP functions & DB2 for i - http://bit.ly/httpAndDB2fori
XML on DB2 for i - http://bit.ly/XMLonDB2fori
•
We explore some Technology topics with articles:
www.ibm.com/developerworks/ibmi/library
•
http://ibm.com/systems/i/db2
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© 2013 IBM Corporation
DB2 for i - App Dev Update
IBM Power Systems
Leadership of DB2 for i
Ease of Use - Self Managing
ISO/ANS SQL Standard - Core
Oracle 11g
Microsoft SQL Server 2008
DB2 for z/OS 10
DB2 for LUW 9.7
DB2 for i 7.1
0
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IBM Power Systems Platform Leader
in SAP Query Performance
Typical DBA Tasks
DB2 for i
Manage DASD Space Allocation
Review Table Space Allocations & Extents
Review & Balance Indexes
Application Rebinding
Maintain Database Integrity
Update Database Statistics
Synchronized OS & DB User Security
Reload Data for Hardware & Software Upgrades
Load Data into Data Base
Build and Manage DB Backup & Recovery
Create & Review Indexes for Tables
Performance Analysis & Tuning (DB & System)
Create and Maintain DB Schema
Automated DB Performance Profiling
Automated
Automated
Automated
Automated
Automated
Automated
Automated
Automated
Parallel Data Import/Export
System i Navigator
System i Navigator
System i Navigator
System i Navigator & 3rd Party Tools (Infosphere
Data Architect, ERwin, PowerDesigner,
Embarcedero,etc.)
Centerfield HomeRun
Advanced DB Performance Analysis & Tuning
System i Navigator - Certerfield HomeRun
Data Replication & Consolidation
Multiple IBM & 3rd Party Products
Integrated Security
Query Navigation Steps/hour
SAP BI Mixed Load Benchmark
300000
250000
200000
150000
IBM i 7.1 and
POWER7 deliver
80% Improvement
100000
POWER7
delivers 56%
improvement
50000
0
POWER6 8-Core
IBM i 6.1
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POWER7 8-Core
IBM i 6.1
POWER7 8-Core
IBM i 7.1
 Self-protecting
 User profiles integration
(IBM i and SQL)
 Object & column level
privileges
 Row-level authority via
views, table functions,
and/or exits
 Authorization lists
 Program adopted authority
 Extensive auditing
 Kerberos & EIM
 Encryption
– 128-bit encryption (3DES &
AES)
– SSL communications
– CGA Cryptographic Service
Provider
– Interfaces
• Java Cryptography
Extension
• CCA Hardware APIs
• Cryptographic Services APIs
• SQL ENCRYPT / DECRYPT
– Key Management
– Field Procedures
© 2012 IBM Corporation
Ease of Use – Self Managing
Integration yields significant operational advantages
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Typical DBA Tasks
Manage DASD Space Allocation
Review Table Space Allocations & Extents
Review & Balance Indexes
DB2 for i
Automated
Automated
Automated
Application Rebinding
Automated
Maintain Database Integrity
Automated
Update Database Statistics
Synchronized OS & DB User Security
Automated
Automated
Reload Data for Hardware & Software Upgrades
Automated
Load Data into Data Base
Parallel Data Import/Export
Build and Manage DB Backup & Recovery
Create & Review Indexes for Tables
IBM i Navigator
IBM i Navigator
Performance Analysis & Tuning (DB & System)
Create and Maintain DB Schema
IBM i Navigator
IBM i Navigator & 3rd Party Tools (Infosphere Data
Architect, ERwin, PowerDesigner, Embarcedero,etc.)
Automated DB Performance Profiling
Advanced DB Performance Analysis & Tuning
Centerfield HomeRun
IBM i Navigator - Certerfield HomeRun
Data Replication & Consolidation
Multiple IBM & 3rd Party Products
© 2013 IBM Corporation
Navigator & the On Demand Performance Center
• Tools to Control Resource Intensive Queries
– Resource Governor
– Governor Exit Point
• Tools to Manage Indexes and MQTs
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System i Navigator.lnk
Show Indexes
Show Materialized Query Tables
Manage Index Rebuilds
Index Advisor
• Tools to Monitor and Analyze SQL Performance
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Performance monitor filtering
Show Statement filters
Analyze
Compare monitors
• Tools to Monitor and Analyze the SQL Plan Cache
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Filter and Show SQL Plan Cache
SQL Plan Cache Snapshots
Analyze
Event Monitor
• Tools to Show Current Activity
– Statistics Requests
– Current SQL for a Job
• Tools to Show Current Database Limits and Sizes
– Health Center
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© 2013 IBM Corporation
DB2 for i - App Dev Update
Navigator – what database users need to know
What are the choices?
IBM i Navigator
System
i Navigator)
 Database users will find (aka
reasons
to use
both Navigator
options Windows PC Install
Where
does it run?
Browser
Served from IBM i 6.1 or
7.1
IBM i Access Windows Service
Pack
IBM HTTP SERVER FOR i
PTF Group:
7.1 - SI47412
7.1 - SF99368 Level 16
6.1 - SF99115 Level 28
Database commonality
Most features are identical,
including TR5 enhancements
Most features are identical,
including TR5
enhancements
Database differences
Run SQL Scripts
Visual explain
SQL Performance Metrics
Minimum service level?
IBM i Navigator.lnk
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IBM Navigator for i
IBM Navigator for i.lnk
© 2013 IBM Corporation
IBM Power Systems
Several Ways to get to the Database Tools
 IBM i Navigator included in IBM i Access for Windows
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This will be the interface used in this presentation
Windows based interface – Windows “look and feel”
Full and rich set of database administration tools
Manages multiple systems
Windows install required
 IBM Navigator for i
– Web browser based tool for managing IBM i
– Alternative to IBM i Navigator
– More than 90% IBM i Navigator function with over 300 web-enabled tasks
– Not including Mgmt Central, Run SQL Scripts, Visual Explain, Database Navigator
• Manages single system
• Automatically installed with IBM i
– ex: https://yoursystem:2005/ibm/console/logon.jsp
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© 2010 IBM Corporation
IBM Power Systems
IBM Navigator for i
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IBM Power Systems
What tool should I use ?
 IBM i Navigator
– Users
1. DB Engineers
2. Programmer that wants to do deep DB and SQL Analysis (Which more of them
SHOULD do)
3. Systems engineers that wants to identify and drill into problem areas
– The Keys pieces
• Visual Explain
• RUN SQL Scripts
 IBM Navigator for i
– Most DB tools are available
• DB monitor, Plan Cache, Object Information
– Key system performance tools - Performance Data Investigator
– No client software to install
– Users
• Systems Engineers
• Programmers
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© 2010 IBM Corporation
IBM Power Systems
DB2 OnDemand Performance Center – User Authority Simplification
*JOBCTL (Job Control Authority)
 Whatever worked with *JOBCTL in IBM i 6.1 will continue to work
QIBM_DB_SQLADM – Database Administrator
 This is a database specific alternative to *JOBCTL. It is a superset of the function authorized
by QIBM_DB_SYSMON.
 Examples:
- Change parallel degree for DB2 SMP feature
- Work with Plan Cache
- Work with OmniFind Text Search Server
QIBM_DB_SYSMON – Database Information
 This allows a user to view some system level details, but not specifics about operations or
anything related to changing or controlling the database.
User Authorization Commands:
 Examples:
CHGFCNUSG FCNID(QIBM_DB_SQLADM)
- QUSRJOBI for SQL information
USER(userid) USAGE(*ALLOWED)
- Show SQL Information for Jobs
CHGFCNUSG FCNID(QIBM_DB_SYSMON)
USER(userid) USAGE(*ALLOWED)
No Special Authority required when using OnDemand Performance Center with own job
 Starting and ending SQL Performance Monitors on your own job
 Analysis of SQL Monitor data and Plan Cache snapshots
 Visual Explain in Run SQL Scripts
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© 2013 IBM Corporation
IBM Power Systems
About IBM i Navigator
IBM i Navigator ships with IBM i Access for Windows
– The database graphical user interface is a component of IBM i Navigator
– IBM i Navigator comes with the base operating system for no extra charge
• None of the database GUI support requires an IBM i Access
License
– When installing IBM i Access on your PC
• Database is not selected by default. Select “Custom" install
For general information on IBM i Access Express for Windows
check our web site at:
– http://www-03.ibm.com/systems/i/software/access/
• (PTFs are available from a link off the above page)
We recommend the latest version of the client be installed.
•
•
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Some new functions available
Works fine with down level servers
© 2010 IBM Corporation
IBM Power Systems
User Interface to the Database
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IBM Power Systems
Explorer-like Interface
New in i 7.1
Global Variables
Types
XML Schema Repository
OmniFind Text Indexes
If product installed
DB Maintenance
Folders under each Schema (Library), for each object type.
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© 2010 IBM Corporation
IBM Power Systems
Starting Run SQL Scripts
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© 2010 IBM Corporation
IBM Power Systems
Creating a Schema
 CREATE SCHEMA MYSCHEMA;
– Organizational construct
– Library/Folder
 A stored procedure is shipped with IBM i
that can create sample schemas
– CALL
CREATE_SQL_SAMPLE(‘CORPDATA’);
– Contains tables (including sample data),
views, aliases, indexes, and RI
– CORPDATA is used in the SQL manuals
and labs
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© 2010 IBM Corporation
IBM Power Systems
Database Object creation
 Create database objects with no storage
considerations (including tables!)
 Browse function for reusing existing
column definitions
 Robust Alter Table support
– No need for special utilities
 How do I rebalance indexes?
 It’s simple! The database does it
for me.
New index create options for specifying
parallel degree and page size
Can create SQL versions of DDS logical
files
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© 2010 IBM Corporation
IBM Power Systems
Run SQL Scripts
 Create/save scripts for repetitive tasks
 Both SQL statements and CL commands
 View and Save output for SQL queries
–
Save to Options
 Call stored procedures with result sets and/or OUTput
parameters and launch iSeries System Debugger
 Do Visual Explain on queries, for performance
analysis and tuning
 Syntax error highlighting and font chooser
 SQL state errors in message box, including second
level text
 Prompting of CL commands
 Ignore drop error messages
 Support for Global Variables 7.1 (new tab)
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© 2010 IBM Corporation
IBM Power Systems
Run SQL Scripts
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CHK SQL portability
Save to SRCPF
Save to IFS file
Save to UTF8 file
Save output to Spread sheet
Toggle output to use display heading
Undoc result window
Launch directly from SQL IFS object
Print results
Font applies to output
Save as for output
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© 2010 IBM Corporation
IBM Power Systems
Save Results
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© 2010 IBM Corporation
IBM Power Systems
Save Results cont.
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© 2010 IBM Corporation
IBM Power Systems
Save Results cont
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© 2010 IBM Corporation
IBM Power Systems
Show SQL statement from create dialogs
 SQL statement is recorded as you fill in
dialog
 Option to show the SQL statement being
built
 Great for learning SQL syntax
 Allows for statement customization
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IBM Power Systems
Keeping schema source
 DDS - source files - (object source file
info maintained)
 SQL - Run SQL Statements PC or IFS
files
 SQL - RUNSQLSTM source files - (object
source file maintained)
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© 2010 IBM Corporation
IBM Power Systems
Generate the SQL
– Regenerate SQL CREATE/ALTER statements directly from the existing objects
• Helpful for when the original statements are no longer available
• Teach programmers about SQL syntax of objects
See what the SQL form of my
DDS-created files would be like
Include generating short
names of objects
Do not generate RI and
triggers for tables
Include SET OPTIONS
statement
V6R1: Now supported at
folder level versus
schema or object
7.1 includes privileges
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© 2010 IBM Corporation
IBM Power Systems
Data Dictionaries
 DDS File Field Reference Files
 SQL CREATE TABLE AS (subselect)
Ex: CREATE TABLE SalesByRegion AS
(SELECT region, SUM(to_sales) FROM sales GROUP BY region) WITH NO DATA
 User-defined types
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Journaling
 Default journal automatically created and
started when creating a schema
 Journal receivers contain journal entries
for recovery
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IBM Power Systems
Table Description
Answers questions like: How big is this
table/file getting anyway?
– Works for indexes and views too!
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IBM Power Systems
Table Description Activity
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IBM Power Systems
How do I synch up my DB and OS userids?
it’s Simple! Group and user authorizations are
managed by operating system
 SQL syntax maps to IBM i security types
 Column level security
 Program vs. object level security
 Views
 Exits
 Auditing
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IBM Power Systems
Database Loading

Parallel Data load (Import)– Wizard based on CPYFRMIMPF and CPYTOIMPF CL commands
–
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Show Command displays command syntax in Run SQL Scripts
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IBM Power Systems
New in 7.1 Database Maintenance folder
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© 2010 IBM Corporation
IBM Power Systems
Constraint Repair
 Works for both check constraints and
referential integrity constraints
 Show problem rows in table
 Able to update column values or delete
entire rows
 Quick access to check constraint
definition for check constraint repair
 Quick access to parent table rows for RI
constraint repair
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Index Builds in progress
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IBM Power Systems
Right click on build in progress
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Alter Table Status
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Reorganize Table
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IBM Power Systems
Reorganize Table Progress Monitoring
 New reorganize table options:
– Allow suspend (cancel)
– Allow online access
– Allow changes
– Influence when to rebuild access paths
 Allow reorganize to be suspended and
resumed later
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IBM Power Systems
From the maintenance folder
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© 2010 IBM Corporation
IBM Power Systems
Right Mouse click on the reorg to see status
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© 2010 IBM Corporation
IBM Power Systems
Reorganize index build Phase
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© 2010 IBM Corporation
Database Reorganization – User specified starting point
Availability and Recovery improvement:
• New option on Reorganize Physical File Member to initiate the reorganize starting at a
point within the table instead of starting at the beginning of the file.
 Most helpful in cases where most of the deleted rows are at the end of the table
(especially when reorganizing to preserve arrival sequence)
 The reorganize will start at that location and proceed to the end of the file
 Makes it easier to finish incomplete reorganizes or target the reorganize at the most
highly fragmented portion of the table
SALES_FACT
dense data
fragmentation
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Start the reorg
here
6.1
7.1
DB2 PTF Group
SF99601 Level 29
DB2 PTF Group
SF99701 Level 21
© 2013 IBM Corporation
IBM Power Systems
Manage Index Rebuilds
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
Manage index re-creation after Reorgs,
Database Restores, etc
• Priority Adjusting
• Monitor Progress

GUI version of EDTRBDAP system
command
© 2010 IBM Corporation
IBM Power Systems
Starting Health Center – Right Mouse Click on DB name
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© 2010 IBM Corporation
IBM Power Systems
Health Center
 Overview to see database object counts
by category
 View database wide or schema specific
– % wildcards can be used
 Capture to history file
 View history of counts for trending
 Environmental Limits
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© 2010 IBM Corporation
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Environmental Limits
• DB limits within Jobs
• Lob Locators
• Active Descriptors
• Max SQL STMT Size
•SQL 901 category
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© 2010 IBM Corporation
IBM Power Systems
Health Center
 Size and Design Limits views
– Size limits are things that change by normal
operations
– Design limits are things that change by
application design
 View database wide, schema specific or by
object name
– % wildcards can be used
 Categorized by limit type, includes system
limit!
 Status indicator for “within percent of limit”
– Changeable threshold
 Capture to history file
 View history of limits for trending
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© 2010 IBM Corporation
IBM Power Systems
Additional Activity counters in i 7.1
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© 2010 IBM Corporation
Tracking Important System Limits
In production environments a new type of health indicator is needed to understand
when the system is trending towards an outage or serious condition.
Automatic tracking of System Limits enables you to:
a) Understand when an application is trending towards a failure
b) Identify applications which are operating inefficiently
c) Establish a general use mechanism for communicating limit information
-- How close am I coming to hitting the Maximum Active jobs limit?
SELECT SBS_NAME, SIZING_NAME, CURRENT_VALUE, MAXIMUM_VALUE , A.*
FROM QSYS2.SYSLIMITS A
WHERE LIMIT_ID = 19000
ORDER BY CURRENT_VALUE DESC
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6.1
7.1
DB2 PTF Group
SF99601 Level 29
DB2 PTF Group
SF99701 Level 22
© 2013 IBM Corporation
IBM Power Systems
™
Tracking Important System Limits (phase 2)
DB1002
File System category:
Maximum size of the object information in a library
Journal category:
Database category:
Maximum number of all rows in a partition
Maximum number of valid rows in a partition
Maximum number of deleted rows in a partition
Maximum number of overflow rows in a partition
Maximum number of variable-length segments
Maximum number of objects that can be
associated with a *MAX250K journal
Navigator:
Add System Limits to DB2 for i Health Center
Maximum size of a journal receiver
Maximum number of objects that can be
associated with a *MAX10M journal
Maximum sequence number for a *MAXOPT1
or *MAXOPT2 journal
Maximum sequence number for a *MAXOPT3
journal
-- See how the ITEM_FACT table is doing today…
select lastchg, comments, current_value, user_name, job_name, client_applname from
qsys2.syslimits where system_schema_name = 'STAR100M'
and system_object_name = 'ITEM_FACT' order by lastchg desc
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7.1
DB2 PTF Group
SF99601 Level
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DB2 PTF Group
SF99701 Level
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© 2013 IBM Corporation
IBM Power Systems
Work Management for Database Jobs
 Work with jobs
– Find a job for which someone is reporting
problems
– Customize list by user, job information,
and column filtering
– Find SQL statement run by the job
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IBM Power Systems
SQL Details for Jobs
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© 2010 IBM Corporation
IBM Power Systems
SQL Details for a Job
 Launched from Databases folder
 Find a job for which someone is
reporting problems
 All columns are sortable
 Shows schema name and program
name, service program name, or
package name, IP Address,
 Can view job log, Show SQL Details, or
end job
 Edit SQL launches SQL statement into
Run SQL Scripts window, or can go
directly to Visual Explain
 Can See Environment, Statement And
Resource Details
 Refresh allows for monitoring
 Allows monitor start on a job in the
list (New in 7.1)
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© 2010 IBM Corporation
IBM Power Systems
Who’s Got Those Table Rows Locked?
 See what jobs have which rows locked for a given table
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Shows the row number locked
Current User column shows “real” userid if from a client
Job information provided
Viewing of row locks also available in Work Management folder for jobs and threads
© 2010 IBM Corporation
IBM Power Systems
Database Performance Monitoring and Tuning
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© 2010 IBM Corporation
IBM Power Systems
Live Analysis – Index Advisor
Want DB2® to help with your Indexing Strategy?
 system-wide repository of DB2 Advised Indexes
– System view makes it easier to create index with biggest impact
– Gauge benefits of index creation based on frequency, last occurrence, common keys
– Available at the database, schema, or individual table level
 Enhanced Index Advice (SQE-Only)
 Ability to view SQL statements that caused index advice (SQE-Only)
 Index Advice Condenser to ease DB2 Performance tuning
– http://www-128.ibm.com/developerworks/db2/library/techarticle/dm-0701forstie/
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© 2010 IBM Corporation
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Index Advisor  Show Statements - improved query identification
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Launching into Show Statements from the Index Advisor has changed to use
precise filtering of the SQL Plan Cache.
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Prior to this enhancement, Table Match results were returned.
Show Statements brought back all queries that matched this criteria:
a) The plan is still in the Plan Cache
To continue to use Table Match,
launch Show Statements
b) That referenced the target table
outside of Index Advisor
c) Caused any index advice to be generated
•
After this enhancement, Exact Match results are returned.
Show Statements brings back all queries that match this criteria:
a) The plan is still in the Plan Cache
b) That referenced the target table
c) The execution of the query results in generation of index advice that
exactly matches the index advice filters provided by IBM i Navigator:
Keys Advised, Leading Order Independent Keys, NLSS Table, NLSS
Schema, Index Type, Partition name and Page Size
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© 2010 IBM Corporation
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IBM i 7.1 – TR6 Candidate
Condense Index Advisor  Show Statements
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We are planning to deliver this additional enhancement in TR6:
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Launching into Show Statements from the Condensed Index Advisor is
changed to use Key Match filtering of the SQL Plan Cache.
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Condensed advice is unique in that the Leading Order Independent Key
information is used and discarded while collapsing advice into the smallest
possible set.
•
Instead of using Table Match or Exact Match, launching Show Statements
from Condensed index advice will return queries that match every order
combination of keys.
a) The plan is still in the Plan Cache
b) That referenced the target table
c) The execution of the query results in generation of index advice that
exactly matches the index advice filters provided by System i Navigator:
NLSS Table, NLSS Schema, Index Type, Partition name and Page Size
d) The advice matches any combination or subset of the Key columns
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© 2010 IBM Corporation
IBM Power Systems
Index Advisor  Show Statements - improved query identification
•
An advanced form
of the SQL Plan Cache
Statements filter is
populated by Navigator.
•
These attributes can’t
be directly modified
by the user.
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© 2010 IBM Corporation
IBM Power Systems
Index Advisor cont – scroll to the right
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© 2010 IBM Corporation
IBM Power Systems
Live Analysis – SQL Plan Cache
Easy analysis of current SQL
workloads …
 Without overhead of database
monitor
 Advanced filtering to quickly
narrow focus to the most
interesting SQL
– By number of executions
– By DB2 object
– …
 Easy access to Visual Explain
for detailed analysis
 Archive capability into snapshot
for future comparisons
 SQE-Only
 Capability to have HVs
inserted into statement
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© 2010 IBM Corporation
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© 2010 IBM Corporation
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SQL Performance Monitor Toolset
Have an existing application and want to
capture the SQL activity and analyze it?
 Start / Stop database monitor
– Pre & Post-Filtering
– Detailed
– Import data from other systems
 Areas to watch:
– Index advised
– Full opens vs. pseudo opens
– Access plan rebuilds
– Index creates
– Table scans on big tables
– Index Scans over large number of keys
 Recommended during application
tuning & problem determination
 Keep a baseline monitor run for comparison
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© 2010 IBM Corporation
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SQL Performance Monitor Filtering
 Minimize system-impact by reducing amount of data collected
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Collect data for a specific user
Collect data for a collection of jobs (QZDASO*)
Collect data for longer-running SQL requests
…
 Enables quicker analysis & identification of SQL performance bottlenecks
 Post-Filtering available for Visual Explain interface
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© 2010 IBM Corporation
IBM Power Systems
SQL Performance Monitor Analysis
 Summary view to more simply decide, if the monitor has attributes that require
deeper analysis
 Integrated analysis with ability to launch other performance tools from current
analysis view
Dashboard Summary
Drill-Thru Analysis
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© 2010 IBM Corporation
IBM Power Systems
SQL Performance Monitor Comparison
 Want to know if an application change,
system change or PTF altered your DB2
performance?
– Compare current SQL performance
“profile” with archived monitor data
– See if the optimizer’s implementation of
an SQL statement has changed
– Can be long-running operation for large
database monitor collections
– Can do High level compare of two or
more monitors
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© 2010 IBM Corporation
IBM Power Systems
Analyze SQL Performance Monitors with Visual Explain
 Select existing detailed SQL Performance
Monitor
 Show list of SQL statements captured by
the monitor
 Can import monitor data from other
systems
 Can narrow down analysis with postfilters
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© 2010 IBM Corporation
IBM Power Systems
Visual Explain
 Active window - Look at DB objects
(indexes, constraints, etc.) involved
 Attributes show all the settings that
impact query optimizer
– Labels include optimizer’s estimates
– SQE plans show decomposed SQL
statement for each operation
 Icon Highlighting to speed analysis
– Expensive nodes
– Index Advised nodes
 Debug messages help bridge to picture
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© 2010 IBM Corporation
IBM Power Systems
VE Explain While Running
 Allows you to see actual runtime feedback in VE diagram
THIS IS VERY COOL!!
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© 2010 IBM Corporation
IBM Power Systems
Index Advisor
 Advisor shows indexes that would help specific query (if any)
 Use advice along with
Index Analyzer for the table
to determine if index would
be helpful
 Create button prompts
Create Index dialog with
recommended columns
pre-filled
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© 2010 IBM Corporation
IBM Power Systems
Statistics
 Advisor in Visual Explain shows statistics
that would help specific query
 How do I run statistics?
– It’s simple! Statistics automatically
created/maintained by database
 Cardinality, Most common values
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IBM Power Systems
Statistics requests running in the background
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IBM Power Systems
Stats requests for QDBFSTCCOL job
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IBM Power Systems
Show Indexes
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© 2010 IBM Corporation
IBM Power Systems
Evaluating your Indexes & MQTs
Is an Index or MQT providing value?
 Launch Evaluators by right-clicking on table and select Show Index or MQT
 Scroll Right to find the interesting query optimizer usage statistics
– Stats updated for all query interfaces – MQTs are SQL-only
– Includes all objects the optimizer evaluates whether created by DDS or SQL
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© 2010 IBM Corporation
IBM Power Systems
Enhanced Index management
From Index Folder I can now:
 See Owning Index Name
 See/ Reset Query Usage Stats
 Show Statements from plan cache that use this index
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Database Application Design
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SQL and External Triggers
 Easily create External and SQL Triggers with new wizard
 Also added Instead of triggers over views
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SQL Graphical Debug
 Starts with SQL *SOURCE Debug View
– Specifying DBGVIEW=*SOURCE on the SET OPTION clause in your SQL
procedure, function, or trigger
– Specify a *SOURCE value for DBGVIEW parameter on the RUNSQLSTM (Run SQL
Statements) CL command
 Graphical iSeries System Debugger
– Part of the Toolbox for Java
– Typical debugger capabilities
– Can debug SQL procedures, functions, and triggers that run on System i5 family
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iSeries System Debugger - example
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DB2 OnDemand Performance Center & Sensitive Data – SECURE columns
 Prevents sensitive data values from being displayed in DB2 performance tools –
Database Monitor & Plan Cache (5.4 & 6.1 PTFs)
– Only security officer will be able to see sensitive values, ‘*SECURE’ value presented to
normal users (… WHERE cardnumber=:hostvar1 )
– User must register sensitive columns with DB2 tooling
 Registration interface is system stored procedure: SET_COLUMN_ATTRIBUTE
– Procedure parameter descriptions
 Table_Schema - System name of a table's schema
 Table_Name
- System name of a table
 Column_Name - System column name being secured.
 Attribute
- Secure attribute setting for column
» SECURE NO
» SECURE YES
– Example:
CALL SYSPROC.SET_COLUMN_ATTRIBUTE
(‘MYLIB1', 'ORDERS', ‘CARDNUMBER', 'SECURE YES');
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Performance Data Investigator
http://www.ibm.com/developerworks/ibmi/library/i-pdi/i-pdi-pdf.pdf
This enhancement provides the ability to view several high-level charts for specific SQL
performance monitors, SQL plan cache snapshots, or SQL plan cache event monitors.
Starting the Investigate Performance Data action from IBM i Navigator or IBM Navigator
for i displays the new graphical interface for SQL Performance monitors, as shown in
Figure 6-9.
Figure 6-9 Start the “Investigate Performance Data” action from IBM i Navigator or IBM Navigator
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 Are you experiencing performance problems?
 Are you using SQL?
 Are you getting the most out of DB2 for i?
IBM DB2 for i Center of
Excellence






Need help?
Database modernization
DB2 Web Query
Database architecture and design
DB2 SQL performance analysis and tuning
Data warehousing and Business Intelligence
DB2 for i education and training
Contact:
Tom McKinley mac2@us.ibm.com
IBM Systems and Technology Group
Rochester, MN USA
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Additional Information
 DB2 for i Websites
– Home Page:
ibm.com/systems/i/db2
– DeveloperWorks Zone: ibm.com/developerworks/db2/products/db2i5OS
– Porting Zone:
ibm.com/partnerworld/i/db2porting
 Newsgroups & Forums
– USENET: comp.sys.ibm.as400.misc, comp.databases.ibm-db2
– DevloperWorks:
https://www.ibm.com/developerworks/forums/forum.jspa?forumID=292
– System i Network DB2 Forum: http://forums.systeminetwork.com/isnetforums/
 Education Resources - Classroom & Online
– ibm.com/systemi/db2/gettingstarted.html
– ibm.com/partnerworld/wps/training/i5os/courses
 DB2 for i Publications
– White Papers:
ibm.com/partnerworld/wps/whitepaper/i5os
– Online Manuals: ibm.com/systems/i/db2/books.html
– DB2 for i Redbooks (http://ibm.com/redbooks)
• Getting Started with DB2 Web Query for System i (SG24-7214)
• OnDemand SQL Performance Analysis … in V5R4 (SG24-7326)
• Preparing for and Tuning the SQL Query Engine on DB2 for i5/OS (SG24-6598)
• Modernizing iSeries Application Data Access (SG24-6393)
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therefrom.
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Information is provided "AS IS" without warranty of any kind.
The customer examples described are presented as illustrations of how those customers have used IBM products and the results they may have achieved. Actual
environmental costs and performance characteristics may vary by customer.
Information concerning non-IBM products was obtained from a supplier of these products, published announcement material, or other publicly available sources and
does not constitute an endorsement of such products by IBM. Sources for non-IBM list prices and performance numbers are taken from publicly available information,
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Some information addresses anticipated future capabilities. Such information is not intended as a definitive statement of a commitment to specific levels of performance,
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to communicate IBM's current investment and development activities as a good faith effort to help with our customers' future planning.
Performance is based on measurements and projections using standard IBM benchmarks in a controlled environment. The actual throughput or performance that any
user will experience will vary depending upon considerations such as the amount of multiprogramming in the user's job stream, the I/O configuration, the storage
configuration, and the workload processed. Therefore, no assurance can be given that an individual user will achieve throughput or performance improvements
equivalent to the ratios stated here.
Prices are suggested U.S. list prices and are subject to change without notice. Contact your IBM representative or Business Partner for the most current pricing in your
geography.
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