Log
Filters
Log
filters provide control over the log messages that are published. A filter uses
custom logic to evaluate the log message content, which you use to accept or
reject a log message—for example, to filter out messages of a certain severity
level from a particular subsystem (for example, JMS or MQ) or according to a
specified criteria (for example, only during peak business hours). Only the log
messages that satisfy the filter criteria are published. You can create
separate filters for the messages that each server instance either writes to
its server log file, standard out, or memory buffer, or broadcasts to the
domainwide message log.
Creating
a Log Filter
1. In
the left pane of the console, select the name of the active domain in the
Domain Structure panel.
2. On
the Configuration: Log Filters page, click New.
3. On
the Create a New Log Filter page, enter a value to identify the filter in the
Name field. Do not put single quotation marks around the value when you type
it; the system will add the quotation marks automatically.
4. Click
Finish.
5. The
new log filter appears in the Log Filters table. To configure a filter
expression, click the log filter name.
6. On
the Configuration page, specify the criteria for qualifying messages. A filter
expression defines simple filtering rules to limit the volume of log messages
that are written to a particular log destination. Either enter the expression
manually or construct one by using the supplied buttons.
7. Expression
clauses can perform a comparison against any log message attribute, including
severity and subsystem.
Applying
a Log Filter
There
are four sets of logs that you can apply filters to. The Log file and Standard
out are shown; the Domain log broadcaster and Memory buffer are not shown.
1. In
the left pane of the console, expand Environment and select Servers.
2. Under
Servers, click the name of the server instance whose logging you want to
configure. In this example, it is MedRecSvr1.
3. Click
the Logging > General tab.
4. On
the Logging: General page, click Advanced.
5. Under
the Message destination(s) section, specify an existing filter for messages
going to any combination of the four log message destinations (Log file,
Standard out, Domain log broadcaster, and Memory buffer).
Using
the Console to Monitor
Whenever
a service or an application object can be monitored, a Monitoring tab is
available in the Console for that object. Clicking it shows you the available
monitoring information for the selected object.
Moreover,
when the Monitoring page shows information in tabular format, you can change
the way the information is displayed. To do this, click the “Customize this
table” link and choose which columns to display and on what columns to sort the
table.
Monitoring
Individual Servers
When
you select a specific server from the domain/Servers
element of the left-most console pane, a server-specific monitoring page is
displayed. A large amount of detailed monitoring information can be obtained
about any running instance of Oracle WebLogic Server. The Performance tab shows
a running numerical output of request throughput, waiting request, and memory
in use, and gives a fast indication of server performance. For a graphical
view, use the WLDF Console Extension tab.
Additionally,
in-depth information is available about a server’s associated cluster, such as
multicast packet loss, packet fragments, and so on. The Security tab provides
statistics specific to security such as invalid logins and locked-out users.
The remaining tabs provide in-depth information about their associated service.
