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Foglight for Oracle (Cartridge) 5.9.2.1 - User Guide

Installing and Configuring Agents Using Foglight for Oracle
Viewing the Databases Dashboard Assigning Instances to Users Selecting an Instance to Monitor Foglight for Oracle Overview Dashboard Overview view Advisories view SQL Performance Investigator (SQL PI) Oracle Activity Drilldown Pluggable Databases Drilldown Storage Drilldown Reviewing Configuration Settings Reviewing the Alert Log Reviewing Monitored Data Guard Environments Reviewing ASM Instances Reviewing Exadata-related Information
Administering Foglight for Oracle Reporting Reference Glossary

Reviewing SGA Settings at the Instance Level

Reviewing SGA Settings

Use the SGA management section to review the current SGA settings for the entire RAC, by means of a row that contains the following indicators:

•
Automatic SGA — indicates whether the SGA memory’s automatic memory management is turned on or off
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Max SGA Size — displays the maximum amount available for the SGA memory.
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SGA Utilization — displays the average amount of SGA memory, in megabytes, which was consumed during the selected time range
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Memory Target — displays the target amount of SGA memory, in megabytes
Reviewing SGA Utilization

The SGA Utilization section contains a chart that displays the instance’s current SGA size in either of the following views:

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Baseline — total SGA space utilization (current SGA size)
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Breakdown — displays the size the following components occupy within the instance’s SGA:
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ASM Buffer Cache (data is available only if the ASM instance is installed and configured)
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Buffer Cache
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Java Pool
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Large Pool
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Shared Pool
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Stream Pool
Reviewing the SGA’s Breakdown

Use the SGA Size section to review the breakdown of the SGA within the instance, by means of the following components:

•
A pie chart — providing a representation of the size each component described in the table occupies within the instance’s SGA
•
A table — shows the SGA’s breakdown between the following components:
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Fixed size
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Variable size
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Database buffers
•
Redo buffers
Reviewing the Free Space Reserved for the Various SGA Pools

The Free Space section displays, both graphically using a chart and in a table format, the free space reserved for the following types of SGA pools for each of the RAC’s nodes:

•
Shared pool
•
Java pool
•
Large pool

Reviewing the Initialization Parameters

The Initialization Parameters panel displays the entire list of initialization parameters, as defined by Oracle. These parameters define the characteristics of each Oracle instance when the instance is started.

Upon clicking anywhere on a row that displays a specific initialization parameter, a popup appears, listing the properties of the selected parameter:

•
The parameter description, taken from Oracle’s documentation (also appears under the Description column).
•
Link to perform searching for further information.
•
Change History table — displays the entire history (time and dates) when the Foglight for Oracle agent detected the changes made to this parameter since the instance was created.

The Initialization Parameters table varies between instance mode and RAC mode. For details about the RAC mode view, see Reviewing the Initialization Parameters in RAC Mode .

In Instance mode, the table displays the following columns

 
Table 26. Initialization Parameters for Instance mode
Name
Description

Parameter

Parameter name.

PDB

In multitenant architectures, the name of the pluggable database.

PDB is Modifiable

Hidden by default. In multitenant architectures, displays the list of pluggable databases that have been modified.

Current Value

The parameter’s current value.

Default

Indicates whether the parameter’s current value is its default value, as defined by Oracle.

Dynamic

Indicates whether the initialization parameter is dynamic, that is, can be modified using the ALTER SESSION, ALTER SYSTEM, or ALTER SYSTEM DEFERRED commands while an instance is running.

Modified

Indicates whether the parameter’s value has been modified.

Deprecated

Indicates whether the parameter is deprecated, in which case specifying it in a parameter file will invoke a warning message when the instance starts.

Type

The parameter type, as defined by Oracle.

Description

The parameter description, taken from Oracle site.

PDB_modifiable

Indicates whether the pluggable database can be modified.

NOTE: This column is not displayed by default.
Reviewing the Initialization Parameters in RAC Mode

In RAC mode, the Initialization Parameters panel can be accessed by selecting either the Whole Cluster or a specific instance view.

In the Whole Cluster view, instance-specific initialization parameters are displayed with the icon to the left of the parameter name, and the names of the various instances are displayed in the Scope column.

The following columns in Initialization Parameters table differ in RAC mode.

 
Table 27. Initialization Parameters in RAC mode
Name
Description

Parameter

Parameter name. A icon to the left of the name indicates that the parameter applies differently to specific instances.

Scope

Indicates whether the parameter applies to the entire RAC or varies between specific instances.

Current Value

The parameter’s current value. This value can be either instance-specific or apply to the entire RAC.

Reviewing the Alert Log

The Alerts drilldown provides a view on the alert and error logs received for a selected Oracle agent during the specified time range.

This drilldown comprises the following panel:

•
Alert Log — see Reviewing the Alert Log
* 
NOTE: Both the Error Log and Alert Log panels are displayed only at the instance level. Selecting the Error Log or Alert Log menu item from within a RAC, when the Whole Cluster view is selected, displays a message that prompts the selection of the requested instance.

Reviewing the Alert Log

By default, the Alert Log panel displays all of the alert log messages.

To display messages under a pre-defined name, category and severity, create or edit patterns for these messages in the Match List, which is found in the Alert Log view in the Databases Administration dashboard, and add the corresponding regular expressions to this list. To prevent messages from being displayed on the Alert Log panel, add these messages to the Ignore List.

* 
IMPORTANT: Only messages that are explicitly defined in the Ignore List will not be displayed. Messages that were not added to either the Match or Ignore lists appear with the name Other, the type of Oracle alert messages, and the severity Information. Therefore, ensure that messages that do not need to be displayed are added to the Ignore List.

The Alert Log panel comprises the panes described in the following topics:

•
Alert Log Messages Chart
•
Alert Log Messages Table
Alert Log Messages Chart

The Alert Log Messages chart provides a graphic, color-coded representation of the various alert log messages, broken down by their severity level, as described below.

•
Informational — displayed on the screen, but does not invoke alarms
•
Warning
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Critical
•
Fatal

The severity assigned for each alert, as well as the minimal severity level (Warning or higher) for which alarms are to be invoked as a result of the alert, are defined using the Alert Log view in the Databases Administration dashboard, accessible from the Agent Settings button.

Alert Log Messages Table

The Alert Log Messages table provides the following details about each alert log:

•
Timestamp — the exact time and date when the alert log message was created
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Severity — can have one of the values listed below
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Informational
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Warning
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Critical
•
Fatal
•
Message — the title of the Oracle error message
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Dump File — this field is populated by a link only if the error message also refers to a dump file. When the link is clicked, the Dump File popup appears, displaying the first 100 lines of the dump file contents.
•
Name — the alert log name
•
Type — the alert log type, such as Oracle errors or Oracle alert messages
* 
NOTE: Both Name and Type refer to the parameters defined using the Alert Log view in the Databases Administration dashboard.
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