db2 for z/os v8: db2 management clients package

IBM Software Group

®

DB2 for z/OS V8:DB2 Management Clients Package

June LundstromCertified Consulting IT SpecialistDB2 for z/OS and DB2 for LUW

IBM Software Group | DB2 Information Management Software

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Includes: Visual Explain DB2 Connect DB2 Administration Server for z/OS DB2 UDB for z/OS Control Center Enablement

Tools provided on CD-ROM DB2 UDB for z/OS Control Center Enablement is shipped on a tape or

cartridge DB2 Management Clients Package Program Directory has installation

directions www.ibm.com/software/data/db2/os390/cc390 for Control Center

customization information

DB2 Management Clients Package


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Database Administration Server (DAS)

DAS provides a general mechanism for running z/OS level functions to support the IBM Universal Database GUI Tools such as Control Center, Command Center and Replication Center.

DAS runs as a USS (Unix System Services) daemon

DAS provides the following functions:

Building and creating JCL jobs (Control Center Version 8 supports creating and storing JCL jobs for most functions including executing DB2 utilities or cloning a subsystem)

Reading and writing data sets Querying operating system catalog information Executing shell scripts in z/OS UNIX Issuing MVS system commands through an extended console


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DB2 for z/OS Control Center Enablement:

IBM DB2 Control Center provides support to help you manage DB2 databases on an array of operating systems in your work place

A set of stored procedures, a user-defined function and a set of batch programs must be installed at each DB2 UDB for z/OS subsystem Control Center Replication Center

The z/OS Enablement provides these stored procedures, user-defined functions and batch programs in the form of an SMP/E installable package (with FMID JDB881D).


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Control Center 390 Enhancements for V8

DB2 Control Center V8 provides database administration functionality in one easy to use tool with point-and-click navigation capabilities that make it easy to find, view, and work with a large number of objects across subsystems.

Version 8 has a revised navigation tree for DB2 for 2 z/OS(TM) and OS/390(R) subsystems with improved object folder ordering and filtering functionality.

Examples of tasks that can be performed on DB2 objects include Create and execute basic data definition (Create, Alter, Drop) Create and execute basic data control (Grant, Revoke) Create and execute DB2 commands (Display, Start, Stop) Execute online utilities (including COPY, REORG, RUNSTATS)

These tasks can either be executed online or be built as JCL jobs (New for Version 8) and scheduled for later execution using default or custom skeletons.


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Control Center 390 Enhancements for V8 - continued Control Center also supports some common system administrative tasks – V8 only:

Homogeneous system copy (offline subsystem cloning) Displaying and setting of subsystem parameters Starting and stopping subsystems

Command Center, which is integrated into Control Center, allows application developers and system administrators to issue SQL queries and host system commands (including MVS(TM) console commands

If you run an online utility such as RUNSTATS on a large number of database objects that were the result of a catalog query or multiple object selection, Control Center uses a server-side utility scheduler to sort the objects according to their

expected execution time and executes them in parallel. This allows for the overall fastest utility execution whilst retaining control over the maximum number of parallel subtasks to be used. The scheduler can also be used in batch mode through JCL jobs.

Create Cloning Session wizard: generates and saves all of the JCL jobs needed to homogeneously copy entire

subsystems. By entering concise information it is possible even for relatively inexperienced system administrators to quickly and successfully clone DB2 for z/OS and OS/390 subsystems.


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DB2 Objects that can be Managed by Control Center

Aliases

Application objects

Buffer pools

Catalog tables

Database users

Databases

Data sets

Indexes

Locations

Schemas

Schemas

Storage groups

Synonyms

Table spaces

Tables

Triggers

Utility objects (data set templates, object lists, and utility procedures)

Views


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Extended Support of DB2 (DSN) Commands

Bind Package

Bind Plan

Free Package

Free Plan

Rebind Package

Rebind Plan

Rebind Trigger Package


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Includes: Graphical Depictions of Access Plans:

Relationships between database objects (e.g. tables and

indexes) and operations (e.g. tablespace scans and sorts) are

illustrated in the graphs Generate customized reports on explainable statements View subsystem parameters View data from the plan table, the statement table, and the

function table Stat Advisor:

Provides a report of what statistics are suggested to

maximize your access path Rewritten for V8

Most recent edition is V1.0.10a as of 8/20/2006 .

Visual Explain


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Visual Explain V8

System requirements: Windows NT Version 4.0, Windows 2000, or Windows XP 150 MB of hard disk space 256 MB of RAM Pentinum III equivalent or above Either DB2 Connect™ Personal Edition Version 7 (or later), or

DB2 Client Application Enabler™ (CAE) with a DB2 Connect Enterprise Edition Version 7 (or later) gateway

A TCP/IP connection to a DB2 for z/OS Version 7 or Version 8 host system

A java-enabled browser to view HTML files


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Visual Explain V8 Enhancements

More context-sensitive tuning suggestions are provided. You can link to these suggestions directly from the graph. You can also link from the graph to additional statistics and descriptions for each object or operation that is used in the access plan

Each graph can display multiple query blocks, so that you can view the entire access plan in one graph. In previous versions of Visual Explain, each graph displayed only one query block. In this version, you still have the option to view only one query block at a time

You can use Visual Explain to catalog and uncatalog databases on your local machine (for DB2 on Linux, Unix, and Windows)

You can use Visual Explain to run a query and view the formatted results

http://www-306.ibm.com/software/data/db2/zos/osc/ve/


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Visual Explain Operational Environment for DB2 on z/OS Visual Explain uses some sample stored procedures:

DSNACCMD: ServiceSQL uses this stored procedure to generate complete ALT BUFFERPOOL statements when collecting service information to send to IBM service during problem investigations

DSNWZP: DSNWZP stored procedure is required to support Browse Subsystems Parameters function

DSN8EXP (See APAR PQ90022): This stored procedure supports the explain with stored procedure option. The purpose of explain with stored procedure is to allow users that should be able to explain SQL against objects that users do not have authority to natively execute queries against

DSNUTILS: Statistics Advisor generates RUNSTATS statements

Java Universal Driver (See APAR PQ62695): Installing the Java Universal Driver on DB2 for z/OS provides Visual Explain with stored procedures used by Visual Explain. Additionally, stored procedure SYSIBM.SQLCAMESSAGE is installed which provides error message description for SQL errors in Visual Explain


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How to Interpret Access Path Graph

Visual Explain V8 displays a much more information in previous versions

Read the online help (ouch!)

To open context sensitive help for a particular graph node, right click the node and select Help. Information for that node is displayed.

If the node indicates an operation, you can find more information, including optimization suggestions, by clicking on the link to the appropriate operation under the Related Constructs heading. (Constructs are groups of nodes that represent a single operation.)


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Saving the access path graph in Visual Explain V8

Visual Explain V8 uses XML to store the graph information

When a statement is explained, the access path graph is displayed on the Access Plan page of the Tune SQL notebook

On this page, select File -> Save XML File to save the XML file to your local workstation

To retrieve the graph, select File -> Open XML File. You can also send the XML file to other people. If they have DB2

Visual Explain installed, they will also be able to see the graph.


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Visual Explain for DB2 for z/OS Control Center Plugin

Allows Visual Explain for DB2 for z/OS to be launched from DB2 Control Center V8 for DB2 OS/390 and z/OS subsystems.

Once the plugin is installed, a menu option, 'DB2 Optimization Service Center Plug-insV8', will be visible.

Select this menu option to launch Visual Explain V8


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Visual Explain Control Center Plug-In

System requirements: Windows NT Version 4.0, Windows 2000, or Windows XP 150 MB of hard disk space 256 MB of RAM Pentinum III equivalent or above DB2 UDB Control Center V8 Visual Explain for DB2 for z/OS V8 Either DB2 Connect Personal Edition Version 7 (or later), or DB2

Client Application Enabler (CAE) with a DB2 Connect Enterprise Edition Version 7 (or later) gateway

A TCP/IP connection to a DB2 for z/OS Version 7 or Version 8 host system

A java-enabled browser to view HTML files


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Visual Explain – Statistics Analyzer – V8 ONLY Use the Tune SQL notebook to determine which statistics need to be collected to

improve the performance of a query

In the Visual Explain window, click Plugin --> SQL Tuning Level Plugin and ensure that the Statistics Advisor option has a check mark next to it.

Open the Tune SQL notebook

On the SQL Text page, enter an SQL statement

Click Analyze.

The recommended RUNSTATS statements are displayed on the Statistics Advisor page

Use the RUNSTATS, Explanation, and Conflict Report tabs to learn more about the reasons for the recommendations

Alternatively, you could copy the RUNSTATS statements and run them in a batch job.


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THANK YOU!

db2 for z/os v8: db2 management clients package

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