2. Best Practices for Maintaining Your Oracle RAC Cluster
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Bryan Vongray
Senior Principal Technical Support Engineer, Oracle
Scott Jesse
Customer Support Director, Oracle
Bill Burton
Consulting Member of the Technical Staff, Oracle
October 2, 2014
Copyright © 2014, Oracle and/or its affiliates. All rights reserved. |

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4. Program Agenda 1
Introduction Preventing Known Issues Being Prepared for Reactive Issues Q&A 2 3 4

5. 70%
Of SRs logged with Scalability Support are Rediscoveries of Known Issues
Frequently
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SRs having Extended Resolution Times are the result of insufficient diagnostic data

6. Today’s Objectives Decrease the number of Reactive issues with RAC
Promote Best Practices
Maintain a “healthy” RAC Environment
Increase System Availability
Reduce the overall SR resolution time when dealing with Reactive Types of Issues
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7. Preventing Known Issues
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8. ORAchk – Oracle Configuration Audit Tool
Proactive self-service method for customers to perform Health Checks on their RAC and Single Instance systems
Validation and System-specific feedback on:
Configuration issues that can impact the system
Best Practices/Success Factors that are not being adhered
Documentation on checks for ease of knowledge transfer
Upgrade Validation for upgrades
Installed with Database – available standalone

9. ORAchk – Easy to Install, Easy to Execute
Download latest ORAchk version – MOS Note:
Transfer orachk.zip to a single node
Extract orachk.zip
Execute orachk
Follow the prompts
Execution times are generally less than 15 min for a 2 node cluster!

10. ORAchk – What to get out of it?
Easy-to-Read HTML Report
System Health Score
ALL Findings Documented with Hyper-linked References
Proactive Patch Recommendations
Report Compare and Merge Functionality

11. ORAchk – Supported Environments
Supported Platforms
Linux x86-64 (OEL, RedHat and SuSE 9, 10, 11)
Oracle Solaris (SPARC and x86-64)
IBM AIX (must have the BASH 3.2 shell installed)
HP-UX (must have the BASH 3.2 shell installed)
MS Windows x64 (2008 and 2012, Cygwin Required)
Supported Oracle Releases
10gR2
11gR1
11gR2
12cR1

12. ORAchk Collection Manager
Companion Application to ORAchk
Dashboard Interface to track ORAchk Collections
Central Repository for ORAchk Collections
Trending of Findings Over Time
Automatic Result Comparison
Incident Tracking System
Available via MOS Note:

13. Being Prepared for Reactive Issues
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Click the left-hand slide preview to which you wish to apply the new master layout.
Apply New Layout (Important): Right-click any selected slide, point to Layout, and click the slide containing the desired layout from the layout gallery.
Delete any unwanted slides or duplicates.
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14. OSWatcher Schell script to collect and archive OS Metrics
Executes standard UNIX utilities (e.g. vmstat, iostat, ps, etc) on regular intervals
Built in Analyzer functionality to summarize, graph and report upon collected metrics
Output is Required for node reboot and performance issues
Simple to install, extremely lightweight
Runs on ALL platforms (Except Windows)
MOS Note: – OS Watcher Users Guide

15. CHM
Cluster Health Monitor
Installed on ALL platforms (except HPUX) with Grid Infrastructure
Collects OS Metrics in Real Time at 5 second intervals
OS Metrics include Memory, CPU, Swap, I/O, etc
Data retention < 1 day (dependent on cluster size) and may be increased – See MOS Note:
Output Required for Node Reboot and Performance Issues
Both CHM and OSW are recommended where available
MOS Note: – CHM FAQ

16. Procwatcher
Tool to continuously monitor and examine Oracle Database and RAC processes at a specified interval
Generates session wait, lock and latch reports as well as call stacks from any problem process(s)
Ability to collect stack traces of specific processes using Oracle Tools and OS Debuggers
Typically reduces SR resolution for performance related issues
Runs on ALL major UNIX Platforms
MOS Note: – Procwatcher Install Guide

17. TFA
Trace File Analyzer Collector
Diagnostic Collection utility that simplifies diagnostic data collection
A single command performs clusterwide diagnostic collection for ALL components
Diagnostic files “trimmed” around the incident time
Collected diagnostics are consolidated on a single node
Increased efficiency of admin staff
Packaged with / – standalone available
Note:

18. TFA vs Traditional Diagnostics Collection
Manual copying/archiving files from multiple locations on a given system and must be repeated for ALL nodes
Diagnostics for a given node often exceed 350MB, for a 4 node cluster this is 1.4 GB of data to upload to MOS.
The customer needs to manually get the correct data covering the correct time
If the data was not properly gathered during the first outage we must “wait” for a re-occurrence of the issue
Node Reboot (All Nodes)
diagcollection.sh output
OSWatcher
CHMOS output
Instance Eviction (All Nodes)
ASM/DB Alert Logs
ASM/DB Trace Files

19. TFA vs Traditional Diagnostics Collection
TFA Approach
Proper diagnostics for an incident collected, trimmed and packaged around the incident time with a single command
One .zip file per cluster node generated and each are consolidated on a single node
Greatly reduced file size containing only data for a particular incident for ease of upload
Optionally perform diagnostic collection automatically when an incident is detected by TFA
All Scenarios
# tfactl diagcollect -for <time>
Note: Alternatively enable Real Time Automatic Diagnostic Collection

20. TFA - Requirements Supported Platforms
Linux x86/x86-64 (OEL, RedHat and SuSE 9, 10, 11)
Oracle Solaris (SPARC and x86-64)
IBM AIX
HP-UX
zLinux
Supported Oracle Releases
All – TFA is written outside the GI/RAC/RDBMS product lines and as such could be used for any type of trace/diagnostic file collection
Note:
BASH shell and JRE 1.5 or higher are required on ALL platforms

21. Putting it All Together
This is a Section Header with Picture slide ideal for including a picture with a brief title and optional subtitle. This slide can also be used as a Q and A slide.
To customize this slide with your own picture:
Right-click the slide area and choose Format Background from the pop-up menu. From the Fill menu, click Picture and texture fill. Under Insert from: click File. Locate your new picture and click Insert.
To copy the Customized Background from Another Presentation on PC
Click New Slide from the Home tab's Slides group and select Reuse Slides.
Click Browse in the Reuse Slides panel and select Browse Files. Double-click the PowerPoint presentation that contains the background you wish to copy.
Check Keep Source Formatting and click the slide that contains the background you want.
Click the left-hand slide preview to which you wish to apply the new master layout.
Apply New Layout (Important): Right-click any selected slide, point to Layout, and click the slide containing the desired layout from the layout gallery.
Delete any unwanted slides or duplicates.
To copy the Customized Background from Another Presentation on Mac
Click New Slide from the Home tab's Slides group and select Insert Slides from Other Presentation…
Navigate to the PowerPoint presentation file that contains the background you wish to copy. Double-click or press Insert. This prompts the Slide Finder dialogue box.
Make sure Keep design of original slides is unchecked and click the slide(s) that contains the background you want. Hold Shift key to select multiple slides.
Apply New Layout (Important): Click Layout from the Home tab's Slides group, and click the slide containing the desired layout from the layout gallery.

22. RAC and DB Support Tools Bundle
Downloadable package containing ALL the tools mentioned in this presentation plus RDA, ORATOP and SQLT
Each tool must be installed individually per that tool’s instructions
Available via Note:

23. Recap
We encourage you to proactively take advantage of the tools outlined in this presentation to provide:
Increased system stability, reliability, and performance
Fewer reactive issues with RAC
Decreased resolution time on reactive issues
Decrease the complexity and eliminate problems with Grid Infrastructure and RAC upgrades

24. Q&A and Important Support Resources
Discover more about Get Proactive:
Get Proactive with Oracle Database (Doc ID )
MOS Community:
Product Information Center (PIC): Oracle Database 11g Release 2 Information Center (Doc ID )
Upgrade/Maintenance Advisors: Patching & Maintenance Advisor: Database (DB) Oracle Database x (Doc ID 331.1)