Oracle GoldenGate 12c: Troubleshooting and Tuning

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Oracle GoldenGate 12c: Troubleshooting and Tuning

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What you will learn
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.
Learn To:
Use GGSCI commands for gathering process evidence.
Use the Oracle GoldenGate troubleshooting tools like Knowledge Documents, Documentation, SHOWSYNTAX
parameter and the Logdump utility.
Troubleshoot problems in areas such as extraction, replication, missed transactions, mapping, synchronization,
SQLEXEC, file maintenance and more.
Identify what causes slow startups.
Monitor lag and statistics.
Identify network and disk bottlenecks.
Perform tuning of Manager, Extract and Replicate.
Diagnose and tune the latest Integrated Extract, available since release of the Oracle RDBMS, and Integrated
Replicat, available since release 12c of the Oracle RDBMS.
Benefits to You
By enrolling in this course, you'll develop deeper knowledge of Oracle GoldenGate 12c performance tuning methods.
Expert instructors will teach you how to identify the causes of slow startups, evaluate lag statistics and solve network
and disk bottlenecks. Utilize all of the existing GoldenGate tools, such as GGSCI and Logdump, the health check scripts
and the Streams Performance Advisor (UTL_SPADV) to troubleshoot system issues occurring to both classic
extract/replicat and integrated extract/replicate.
Explore Platforms
This training is on a Linux platform; however many of the troubleshooting techniques are equally applicable to a
Windows or iSeries platform. The databases used for source and target are Oracle 12cR1. Many of the techniques are
also applicable to DB2, SQL Server, MySQL, etc.

Course Objectives
Monitor and tune performance
Gather evidence to help troubleshoot problems
Use troubleshooting tools
Familiarize with the latest tools to troubleshoot Integrated Extract/Replicat
Describe solutions for the most common problems

Course Topics
Gathering Evidence
Acquiring confidence using the standard Oracle GoldenGate tools normally used to interact with the software:
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
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
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 GoldenGate
Introducing the use of CHECKPARAMS to verify that the parameter syntax is correct
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 caching uncommitted transaction data
In-depth analysis of abending Extracts: is Extract unable to open the transaction logs? - Checking to see if the disk is full -Is an archive log missing?
In-depth analysis of abending data pumps: Does the data pump abend with error number 509 ("Incompatible record")?Have the source tables been changed? Is the Extract abending due to data manipulation?
Was the primary Extract or the data pump stopped, re-added, or restarted without resetting the data pump’s read position in the local trail?
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" commands indicate that the Replicat read checkpoint is not moving?
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 "Add TranData" issued for each table?
Missed Transactions
Developing the ability to deal with and troubleshoot missed transactions involving issues such as: Tables that are not properly specified - Missing" Add TranData" command - LOB data not replicating
Analyzing the reasons why transactions are not being processed: Were the tables included in Table and Map statements? Are fully qualified names (owner.table) used for both Table and Map?
'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?
Mapping and Synchronization Problems
Developing the ability to deal with and troubleshoot mapping problems, such us: Fetching from the source data fails - Table and column names not matching between the source and the target
Analyzing the causes of various mapping problems:Is Extract returning fetch-related errors? Was the row containing the data deleted?
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 names fully qualified (schema.table)?
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.
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
"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
"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
"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

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