Use the following procedure for monitoring the Oracle database.
- Navigate to Database monitoring on the left pane.
- Select Oracle from the Select database drop-down list.
- Select a service from the Select service drop-down list.
The following screen appears along with the various available tabs.
The Hardware tab is selected by default. The following widgets are displayed.
|Disk usage of the database server
|CPU usage of the database processes
|Memory usage of the database server
|Network I/O disk usage
|Network disk usage of the database server
|Network I/O disk request
|Network disk requested from the database server
Clicking the Query Performance tab and selecting the threshold from the Query threshold drop-down list displays the following screen.
You can download the Query Performance table in PDF format by clicking the icon. Only the top 100 entries are downloaded if there are more than 100 entries for downloading.
Clicking the Connections tab displays the following widgets as in the following screen.
|Number of connections
|Represents the total connections to the DB server (Count)
|Number of sessions
|Represents the total sessions in the DB server
|Details of all unique users, number of queries the user is currently running, and last active time of the user
Clicking the Metrics tab displays the following widgets.
|Host cpu utilization
|This metric represents the CPU used across hosts.
|Disk read per second
|Number of times per second the DB server reads from the files (count value)
|Disk write per second
|Number of times per second the DB server writes from the files (count value)
|Number of long running (>60s) queries
|Queries with status as 'active' and type not equal to 'Background' time greater than 60 seconds.
|Total number of transactions per second (commits and rollback).
|Number of redo log file switch
|Count of 'log file switch completion' event from V$SYSTEM_EVENT.
|Number of redo log file waits
|Count of 'log file parallel write' event from V$SYSTEM_EVENT.
|Hit ratio for the SGA
|Measure of the effectiveness of the Oracle database buffer. The higher the buffer hit ratio, the more frequently Oracle found a data block in memory and avoid a disk I/O. Calculated using (physical reads - physical reads direct (lob) - physical reads direct)/ session logical reads.
|SGA cacheable memory per statement
|Shared pool cache in SGA per statement.
|SGA cacheable memory per user
|Shared pool cache in SGA per user.
Number of long running (> 60s) queries per second