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Oracle SNMP Support Reference Guide Release 9.2.0
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Oracle SNMP Support Reference Guide Release 9.2.0
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Oracle SNMP
Support Reference Guide
Release 9.2.0
March 2002
Part No. A96672-01
Oracle SNMP Support Reference Guide, Release 9.2.0
Part No. A96672-01
Copyright © 1996, 2002 Oracle Corporation. All rights reserved.
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iii
Contents
Send Us Your Comments................................................................................................................ xvii
Preface.......................................................................................................................................................... xix
1 Overview of Oracle SNMP Support
Benefits of Oracle SNMP Support.................................................................................................. 1-2
How SNMP Works ............................................................................................................................. 1-3
The Components of SNMP............................................................................................................... 1-3
Management Station .................................................................................................................... 1-3
Requirements for Implementing Oracle SNMP Support ................................................ 1-4
Management Framework............................................................................................................ 1-4
Management Application............................................................................................................ 1-6
Managed Node.............................................................................................................................. 1-7
Master Agent................................................................................................................................. 1-7
Subagent......................................................................................................................................... 1-7
Oracle Enterprise Manager ......................................................................................................... 1-8
Intelligent Agents ......................................................................................................................... 1-8
Management Information Base (MIB)....................................................................................... 1-8
How SNMP Communications Are Performed............................................................................ 1-10
SNMP Support On Oracle .............................................................................................................. 1-11
2 Configuring SNMP for Oracle
Configuring SNMP on Windows NT ............................................................................................. 2-1
Installing the SNMP Network Service....................................................................................... 2-1
iv
Configuring the SNMP Network Service.................................................................................. 2-2
Integrating SNMP with the Intelligent Agent.......................................................................... 2-3
Installing the Agent............................................................................................................... 2-3
Configuring the SNMP Services File .................................................................................. 2-3
Modifying the Master Peer Agent Configuration File..................................................... 2-4
Starting the SNMP Environment............................................................................................... 2-6
Verifying Active UDP Ports................................................................................................. 2-6
Manually Starting SNMP Services...................................................................................... 2-6
Starting and Stopping SNMP Services by Batch File ....................................................... 2-7
Testing the SNMP Environment................................................................................................. 2-7
Testing the Value of an OID................................................................................................. 2-8
Testing Oracle Specific Values............................................................................................. 2-9
Configuring SNMP on UNIX Platforms ........................................................................................ 2-9
Using only an SNMP Console..................................................................................................... 2-9
Configuring the SNMP Master Agent..................................................................................... 2-10
Starting the SNMP Agents......................................................................................................... 2-10
Loading the Oracle MIBs........................................................................................................... 2-11
Configuring SNMP with Enterprise Manager............................................................................ 2-11
3 Oracle MIB Overview
Oracle Products Providing SNMP Support................................................................................... 3-1
Oracle Database ............................................................................................................................ 3-1
Listener........................................................................................................................................... 3-2
Oracle Names................................................................................................................................ 3-2
Oracle Enterprise Manager.......................................................................................................... 3-2
MIBs Supporting These Products.................................................................................................... 3-2
Network Services MIB ................................................................................................................. 3-2
Public RDBMS MIB ...................................................................................................................... 3-3
Private Oracle Database MIB...................................................................................................... 3-3
Other Oracle Private MIBs........................................................................................................... 3-3
Interpreting SNMP OIDs.................................................................................................................. 3-4
Interpreting Oracle OIDs............................................................................................................. 3-4
Interpreting OIDs for Oracle-Implemented Public MIBs ....................................................... 3-5
Interpreting OIDs for Instances of Oracle MIB Variables....................................................... 3-6
v
4 Designing Management Applications Based on Oracle MIBs
Using MIB Variables for Different Purposes................................................................................ 4-1
Using a Sufficient Sample Size to Calculate Tuning Ratios ...................................................... 4-1
Presenting Performance Ratios Graphically................................................................................. 4-2
Scaling MIB Variable Values Dynamically ................................................................................... 4-2
Working Around the Wraparound................................................................................................... 4-2
Most Useful Database Instance Performance Ratios................................................................... 4-3
5 Reading the MIB Variable Descriptions
Variable name ...................................................................................................................................... 5-1
A Interpreting Variables of the Oracle Database MIB
oraDbSysTable .................................................................................................................................... A-2
oraDbSysConsistentChanges...................................................................................................... A-3
oraDbSysConsistentGets............................................................................................................. A-4
oraDbSysDbBlockChanges.......................................................................................................... A-5
oraDbSysDbBlockGets................................................................................................................. A-6
oraDbSysFreeBufferInspected.................................................................................................... A-6
oraDbSysFreeBufferRequested................................................................................................... A-7
oraDbSysParseCount ................................................................................................................... A-8
oraDbSysPhysReads..................................................................................................................... A-8
oraDbSysPhysWrites.................................................................................................................... A-9
oraDbSysRedoEntries ................................................................................................................ A-10
oraDbSysRedoLogSpaceRequests............................................................................................ A-10
oraDbSysRedoSyncWrites......................................................................................................... A-11
oraDbSysSortsDisk..................................................................................................................... A-12
oraDbSysSortsMemory.............................................................................................................. A-12
oraDbSysSortsRows................................................................................................................... A-13
oraDbSysTableFetchRowid....................................................................................................... A-14
oraDbSysTableFetchContinuedRow........................................................................................ A-15
oraDbSysTableScanBlocks......................................................................................................... A-15
oraDbSysTableScanRows.......................................................................................................... A-16
oraDbSysTableScansLong......................................................................................................... A-17
oraDbSysTableScansShort......................................................................................................... A-17
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