Oracle GoldenGate 19c: Troubleshooting and Tuning

Duration: 4 days

Overview

This Oracle GoldenGate 12c Troubleshooting and Tuning training teaches you how to gather and examine evidence; you’ll also learn to solve case problems, diagnose their cause and find methods of resolution. Each of these practices challenges you to diagnose and troubleshoot the issue using GoldenGate software.

Skills Covered

Upon completion of this course, you will accomplish following:

·       Diagnose problems and gather evidence using GGSCI commands.

·       Troubleshoot issues using Oracle GoldenGate troubleshooting tools such as SHOWSYNTAX parameter, Documentation, Knowledge Documents, and Logdump utility.

·       Fix problems related to replication, extraction, synchronization, mapping, missed transactions, file maintenance and SQLEXEC etc.

·       Identify the cause of slow startups.

·       Monitor statistics to prevent lag.

·       Identify bottlenecks in network and disk.

·       Conduct diagnosis and performance tuning of Extract, Manager, and Replicat

Course Modules

Module 1: Gathering Evidence

·       Acquiring confidence using the standard Oracle GoldenGate tools normally used to interact with the software:

·       GGSCI

·       Error Logs, Process Reports, Discard File, System Logs

·       Competently using the tools mentioned above to gather evidence about alleged issues occurring to an Oracle GoldenGate environment

Module 2: Oracle GoldenGate Troubleshooting Tools

·       Accessing knowledge Documents – Mailing lists, Oracle GoldenGate forums, etc

·       Consulting the Documentation

·       Getting familiar with the ShowSyntax parameter

·       Getting familiar with the logdump utility

Module 3: Basic and Startup Problems

·       Getting familiar with basic problems

·       Developing the ability to deal with Extract and Replicat startup issues

·       Verifying file names, file permissions, consistency between Extract and Replicat group names and their supporting files

·       Verifying consistent naming convention when defining trail files and their reference in the Extract/Replicat parameter files

·       Verifying that the correct software version has been installed

·       Verifying that the Oracle GoldenGate manager is running, that the group name which fails to start exists and is not misspelt

·       Verifying that the the parameter file exists, has the same name as the Extract/Replicat group, and is accessible by Oracle Golden

·       Introducing the use of CHECKPARAMS to verify that the parameter syntax is correct

Module 4: Data Extraction Problems

·       Developing the ability to deal with and troubleshoot data extraction issues:Extract is slow – Extract abends – Data pump abends

·       Analyzing various causes of a slow Extract startup

·       Tracing may be enabled, activity logging may be enabled, many columns listed in tables being replicated

·       Introducing the use of the CacheMgr parameter to control the virtual memory and temporary disk space that are available for cac

·       In-depth analysis of abending Extracts: is Extract unable to open the transaction logs? – Checking to see if the disk is full -Is an a

·       In-depth analysis of abending data pumps: Does the data pump abend with error number 509 (“Incompatible record”)?Have th

·       Was the primary Extract or the data pump stopped, re-added, or restarted without resetting the data pump’s read position in the

Module 5: Data Replication Problems

·       Developing the ability to deal with and troubleshoot data replication issues:

·       Analyzing the various causes of a “stuck” Replicat: Does “Stats Replicat” return no statistics? Do successive “Info Replicat” com

·       Verifying that the Replicat is reading the trail to which Extract is writing

·       Analyzing the reasons why a Replicat abends: Is Replicat unable to locate a trail? Is Replicat unable to open a trail file? Was “Ad

Module 6: Missed Transactions

·       Developing the ability to deal with and troubleshoot missed transactions involving issues such as: Tables that are not properly s

·       Analyzing the reasons why transactions are not being processed: Were the tables included in Table and Map statements? Are f

·       Single quotes’ on object names imply case-sensitive names for some databases (including the Oracle database)

·       Are the transactions coming out of the source system properly?

Module 7: Mapping and Synchronization Problems

·       Developing the ability to deal with and troubleshoot mapping problems, such us: Fetching from the source data fails – Table and

·       Analyzing the causes of various mapping problems:Is Extract returning fetch-related errors? Was the row containing the da

·       Has the undo retention expired?

·       Is “NoUseLatestVersion” for “FetchOptions” being used?

·       Do the source and target tables exist in the databases? Are they specified correctly in the Table or Map statement? Are their na

·       Do table and column names contain only supported characters?

·       Are WHERE clauses comparing different data types?

·       Is KeyCols being used? Are both source and target KeyCols being used? Corresponding source and target columns must match

Module 8: SQLEXEC, File-Maintenance, and Other Problems

·       Developing the ability to deal with and troubleshoot:

·       SQLEXEC problems – File-maintenance problems – Time differences – Too many open cursors

·       File-Maintenance Problems: Discard File Is Not Created – Discard File Is Too Big – Trail File Is Too Big

·       Miscellaneous Problems: Time Differences – INFO Command Shows Incorrect Status

Module 9: "Classic" Performance Tuning

·       Identifying causes of slow startups

·       Monitoring lag and statistics

·       Tuning Manager

·       Identifying network and disk bottlenecks

·       Tuning “Classic” Extract

·       Tuning “Classic” Replicat

Module 10: "Integrated" Performance Tuning

·       Describing architecture and advantages of the new Integrated capture

·       Describing architecture and advantages of the new Integrated delivery

·       Familiarizing with the new V$ tables holding real time Oracle GoldenGate statistics

Module 11: "Integrated" Capture and Delivery Troubleshooting

·       Familiarizing with Troubleshooting Aids and Tools for Integrated Replication

·       Describing Oracle GoldenGate Healthcheck for Integrated Replicat

·       Describing the Oracle Database 12c GoldenGate AWR report

Prerequisites

Good knowledge of Oracle Database

Oracle Database 12c: Administration Workshop