Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Home August How to check alert log in Oracle 11g. What is Alert Log? The alert log of a database is a chronological log of messages and errors, and includes the following items: 1 All internal errors ORA , block corruption errors ORA , and deadlock errors ORA that occur. Post a Comment. Oracle 11gR2 is a major release upgrade from 10gR2 and 11gR1 both. All rights reserved.
Many of the adrci commands are very similar to the standard Unix vi commands. For example. Monitoring Database operations with Server Generated Alerts. A server generated alert is typically a notification from the Oracle database server of an impending problem. The notification may also contain suggestions to remedy the situation. Notifications will also be provided when the error condition has been cleared. Alerts are automatically generated for error conditions, or when data does not match expected values for metrics, for example.
Server-generated alerts can be based on threshold levels or be generated because of an error condition. Threshold-based alerts can be triggered at both warning and critical levels.
These levels can be either internal values or customer defined values. These can be adjusted to requirements. Alerts are not always based on threshold levels:. Oracle Enterprise Manager reads this queue and provides notifications about outstanding Server alerts, and may also provide suggestions for correcting the problem.
You can configure notifications for these alerts to be emailed or paged to selected administrators. The data is periodically flushed to the Automatic Workload Repository, to capture or create a history of metric values. You can do this through Enterprise Manager. In the above example a warning message is issued if the CPU time exceeds microseconds for a user call. A critical alert is issued if a user call exceeds 10, microseconds of CPU time.
This indicates the number of minutes that the condition must deviate from the threshold value before the alert is issued. This helps to filter out transient conditions. This specifies how many times the metric must violate the metric before the alert is generated.
Viewing Server Generated Alerts. The easiest way to view server-generated alerts is by accessing the Database Home Page of Enterprise Manager. There are however a number of other ways to view these server generated alerts. If you are not using enterprise manager:. The following views provide information about server-generated alerts:.
Lists the threshold settings defined for the database. Describes the outstanding alerts in the database. Lists a history of alerts that have been cleared.
Provides information such a group and type for each alert. Contains the names, identifiers, and other information about the system metrics. Contains system level metric values. Contains a history of system level metric values. Monitoring Performance. Locks are mechanisms that prevent the destructive interaction between transactions accessing the same resources. The resources can be user objects such as tables and rows or system objects, such as shared data structures in memory and data dictionary rows.
The Oracle database automatically manages locks when executing SQL statements.
0コメント