Курс: Oracle GoldenGate 12c: Troubleshooting and Tuning

Продолжительность курса: 32 ак. ч.

Формат обучения:
• Очно - на территории нашего учебного центра или на территории Заказчика (для корпоративных клиентов)
• Онлайн обучение с помощью вебинаров в режиме "здесь и сейчас"
• Дистанционно с помощью системы СДО в любое удобное для вас время

Описание курса:
This Oracle GoldenGate 12c Troubleshooting and Tuning course teaches you the skills to be self-sufficient in gathering and examining 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. 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. 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.

Аудитория:
• Database Administrators
• System Administrator
• System Integrator
• Implementation Consultant
• Systems Architects
• Data Warehouse Administrator

Результат обучения:
После изучения курса слушатель будет уметь:
• 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 11.2.0.4 of the Oracle RDBMS, and Integrated Replicat, available since release 12c of the Oracle RDBMS

Программа курса:
Модуль 1. Gathering Evidence
• GGSCI
• Competently using the tools mentioned above to gather evidence about alleged issues occurring to an Oracle GoldenGate environment
• Error Logs, Process Reports, Discard File, System Logs
• Acquiring confidence using the standard Oracle GoldenGate tools normally used to interact with the software

Модуль 2. Oracle GoldenGate Troubleshooting Tools
• Consulting the Documentation
• Accessing knowledge Documents - Mailing lists, Oracle GoldenGate forums, etc.
• Getting familiar with the logdump utility
• Getting familiar with the ShowSyntax parameter

Модуль 3. Basic and Startup Problems
• 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
• Verifying file names, file permissions, consistency between Extract and Replicat group names and their supporting files
• Getting familiar with basic problems
• Developing the ability to deal with Extract and Replicat startup issues
• 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 consistent naming convention when defining trail files and their reference in the Extract/Replicat parameter files

Модуль 4. Data Extraction Problems
• Analyzing various causes of a slow Extract startup
• Introducing the use of the CacheMgr parameter to control the virtual memory and temporary disk space that are available for caching uncommitted transaction data
• 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?
• 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?
• 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?
• Tracing may be enabled, activity logging may be enabled, many columns listed in tables being replicated
• Developing the ability to deal with and troubleshoot data extraction issues:Extract is slow - Extract abends - Data pump abends

Модуль 5. Data Replication Problems
• 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?
• 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?
• Developing the ability to deal with and troubleshoot data replication issues

Модуль 6. Missed Transactions
• '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?
• 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?
• 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

Модуль 7. Mapping and Synchronization Problems
• Is KeyCols being used? Are both source and target KeyCols being used? Corresponding source and target columns must match
• Are WHERE clauses comparing different data types?
• Do table and column names contain only supported characters?
• 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?
• 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
• 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)?

Модуль 8. SQLEXEC, File-Maintenance, and Other Problems
• SQLEXEC problems - File-maintenance problems - Time differences - Too many open cursors
• Developing the ability to deal with and troubleshoot 
• 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

Модуль 9. Classic Performance Tuning
• Monitoring lag and statistics
• Tuning Manager
• Identifying network and disk bottlenecks
• Tuning Classic Extract
• Tuning Classic Replicat
• Identifying causes of slow startups