Transcript Cleaning up your Oracle Environment

Migrating to 11g – Step Ordered
Approach
April Sims OCP 8i 9i 10g
Southern Utah University
The “Lone” DBA
April Sims, Editor
Step Ordered Approach
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Narrows the amount/time of outage needed
Interim steps
Oracle is backwards compatible – generally
What is compatible?
Patching, upgrades and migrations – Tips and
Techniques.
Compatible Components –
Higher version than database
• Oracle Net Services
• Clients
• RMAN binary, Virtual/Catalog and Database
• Grid Control Repository Database
• Grid Control Intelligent Agents
• ASM
**EXPORT/IMPORT and DATAPUMP will have
issues
Oracle Application Server Cross
Compatibility
• Deploy Ear files from 10.1.3.x  10.1.2.x
• Utilize latest OC4J enhancements without starting
another HTTP Server.
• Using static ports – Note 184826.1
Deploy the ear file, default-web-site.html to find the port
number, add lines to 10.1.2 mod_oc4j.conf
Oc4jMount /instance ajp13://localhost:12507
Oc4jMount /instance/* ajp13://localhost:12507
Recommended Order of
Implementation
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Listener
Rman
Rman Catalog
GC database
Clients
ASM
Database and Optimizer
Planning for Change – Keeping
things clean!
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Maximum Availability Architecture – OTN
Multiple Oracle Homes
Multiple Operating System Accounts
Environmental Variables – SID.cnf for
variables not in .profile which is executed
using oraenv
• Scripting
Why Clean Things Up?
• It is enough work to install, maintain and upgrade
multiple instances with multiple ORACLE_HOMES
(OH)….
• Less need to modify scripts after an upgrade
• Less errors and/or problems when the environment
becomes “cloudy” with more than one OH.
• Less core dumps.
• Less off-hours work due to
installs/patches/upgrades/testing
Multiple $ORACLE_HOMES
Core dumps, fatal tns errors or hanging if exp, imp, expdp,
impdp, sqlplus from one OH to a database in a different
OH (on the same node)
Different OH’s different versions or patches.
Recommended by Oracle Support.
Multiple listeners running in different OH’s can also cause
problems as well as multiple OMS Intelligent Agents
It is normal to have several OH’s at any point in time. Now
what is the best way to do this safely?
It can be done by the same “oracle” unix account or by
using two different “oracle” unix accounts (multiple is
safer) REALITY CHECK!
Multiple OraInventory’s
Contents of /etc/oraInst.loc
inst_group=oinstall
#inventory_loc=/u01/10.2/oraInventory
inventory_loc=/u01/11.1/oraInventory
*This is for those who survived an oraInventory
corruption and lived to tell about it. Comment or
uncomment as needed for each install. Not
recommended by Oracle.
I don’t need no stinking
patches……
Patch Set
8.1.7.4
9.0.1.5
9.2.0.7
10.1.0.5
10.2.0.2
10.2.0.3
10.2.0.4
Number of bugs
1757
1000
2000
2500
1173
2007
4326
Upgrades and Patches
Have at least 2 $ORACLE_HOMES one for production,
one for testing patches – ALWAYS!!!!
Find the most stable, what is the terminal release? Put in
the latest CPU or PSU patch.
Bad version that is x.0.0.0 (unpatched) because it is rare
that you can truly simulate production load….Bugs
come out under pressure.
Cancel out of the install when it starts to configure Net
Manager and the Intelligent Agent (configure later).
Switch to new listener during off peak hours.
Tactics in applying Patches
How often is the OS
patched?
Probably more
often than
Oracle!!!!
Check out the new Patch Plan functionality in My
Oracle Support…and integration with Grid Control.
Oracle Target Configurations
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Generic
Real Application Clusters and CRS
DataGuard (and/or Streams)
Exadata
Ebusiness Suite Certification
Oracle Recommended Patches
• Common issues in targeted configurations.
• Stabilize production environments.
• Save time and cost with known issues.
• Tested as a single combined unit, reducing risk.
• Easier to identify applicable patches.
https://metalink2.oracle.com/metalink/plsql/docs/10g_
Upgrade_Companion.htm
PSU – Patch Set Update
1st Digit - Major release number
2nd Digit - Maintenance release
3rd Digit - Application server release
4th Digit - Release component specific
5th Digit - Platform specific release
First PSU – 10.2.0.4.1
Second PSU – 10.2.0.4.2
MetaLink Doc ID 850471.1
**Includes latest CPU at release time
PSUs vs. CPUs Information
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PSUs available since DB Version 10.2.0.4
Both CPU & PSU Released Quarterly
PSUs include CPUs
PSUs are a Superset of CPUs
Might need merge patch if migrating from a
CPU
• Don’t revert back to CPU once on PSU
http://blogs.oracle.com/gridautomation/
Issues with Conflicts and Rollbacks
Without My Oracle Support
• Download patch then…
• Install….if conflict then
• Check if any key patches
rolled back
• Merge request…..then
• Wait….might be too late for
this CPU, narrow
window….maybe next
quarter!
My Oracle Support
• Patch Plan
• Auto checks prerequisites
• Checks Conflicts before
downloading
• Request Merge before
downloading
• Check Recommendations
• Deployment Plan Available
Net Services – Listener Pre-Spin
• Give each database a different listener port,
use naming convention
• I don’t use port 1521 for any listener
(because of autoregister feature)
• Put ORACLE_HOME of database if using
Listener in a different ORACLE_HOME
• Define local_listener in init.ora
• TCP, BEQ
Listener.ora
LISTENER_TEST = (ADDRESS = (PROTOCOL =
TCP)(HOST = FQ.NODENAME)(PORT = 1540))
SID_LIST_LISTENER_TEST =(SID_LIST =
(SID_DESC = (SID_NAME = TEST)
(ORACLE_HOME = /u01/app/oracle/product/10gR2) ) )
ADMIN_RESTRICTIONS_LISTENER_TEST=ON
LOG_FILE_LISTENER_TEST=listener_test.log
Rotate Listener Log
export dat="`date '+%y%m%d'`"
lsnrctl << EOF
set current_listener listener_test
set log_file listener_tmp.log
exit
EOF
mv listener_test.log listener_test.${dat}
cat listener_temp.log >> listener_test.${dat}
Clients
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ODBC,SQLPLUS, Instant Client ****
Database Links ****
32/bit to 64/bit ****
JDBC, JDK **
Precompilers **
Features Availability **
Exp/Imp or Datapump *
BEQUEATH not supported b/t diff releases
****Highly recommended, usually minor issues
** Needs testing, maybe application specific
* Definitely has issues
RMAN
• Migrating the catalog database
• Multiple schemas- One for each release
and/or database
• Upgrading the rman catalog
• Differences in 11g
RMAN Duplicate – Upgrading
• RMAN is configured so that a higher release is
able to restore a lower release
SQL> alter database open resetlogs upgrade;
SQL> alter database open resetlogs downgrade;
Then run CATUPGRD.SQL or CATDWGRD.SQL
• Can’t use duplicate command
• Different OS levels
• Switch between word sizes (32 vs 64)
• Use Transportable Tablespace Conversion
between different OS’s
Grid Control
• Migrating Repository Database to 11g – if
uncoupled install – Use GC 10.2.0.5+
• Co-locate RMAN Catalog (s) - much easier to
move, migrate or drag along with GC.
ASM/CRS/RDBMS
• CRS must have its own $ORACLE_HOME
• ASM can be separate as of 10gR2
• Push to move ASM, CRS and RDBMS to
three different operating accounts
• One-off patches - separate ASM and RDBMS
• Rolling Upgrades
11g Diagnosability Framework
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Environmental Variable – ORACLE_BASE
adrci command-line utility
Scripting changes
Rotating, purging logs, trace files, core
dumps and incidents
• Can disable ADR, especially for
troubleshooting
11gR1 Surprises
• SYSTEM password expires with default
profile
• Case sensitivity issue between primary and
physical standby – new security feature
Characterset Selection – UTF8
Any implications for migration? options are
usually some sort of csalter and/or exp/imp,
datapump.
Transitional Steps – convert to a superset to
remove some types of lossy data. See blog
also NLS by Gary Gordhammer articles in
IOUG “SELECT”
Grid Control and RMAN catalog can be UTF8
Database Upgrade Methods
• EXP/IMP or DataPump • Transportable Tablespaces - same or
different node
• DBUA
• Manual Upgrade
• Transient Logical Standby
• Physical Standby
• Snapshot Standby
Optimizer Upgrade
• SQL Plan Management
• Bulk Load
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SQL Tuning Set (STS)
Stored Outlines
Cursor Cache
Use a staging table
http://optimizermagic.blogspot.com
PreUpgrade Optimizer
• Source database – instance-wide stats at
peak load, 7 days
• Statspack – Level 7
• AWR – Diagnostics, Tuning Pack
• OS stats - CPU, memory and IO (such as sar,
vmstat, iostat)
Migration – Step Ordered
Approach
•
•
•
•
•
Narrows the amount/time of outage needed
Interim steps
Oracle is backwards compatible – generally
What is compatible?
Patching, upgrades and migrations
Questions?
Leave Business Card – put question or interest on back.
http://www.twitter.com/aprilcsims
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Twitter hash tags
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