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 Force Garbage Collection: This will force the JVM to free up all unused memory. This

should be run in order to get a true memory reading from the main performance screen.

Keep in mind that forcing a garbage collection will slow the server down and shouldn’t be

forced continually. The JVM usually manages garbage collections automatically as the

server runs.

7. To monitor database connections, expand Services > JDBC > Connection Pools.

8. Select dbaPool.

9. Select the Monitoring tab and Monitor all instances of dbaPool.

10. This page shows you the initial, maximum, and high number of db connections. You should

monitor whether the high number is at or near the maximum number of connections. If so,

you should consider increasing the database connections in the dbaPool.

UNIX

On UNIX, you can monitor system performance using the ps, top, or sar. You should monitor general

trends, such as CPU usage, memory usage, and memory swapping (out to virtual memory). All

processes for Oracle Transportation Management should run under the user setup during the

installation process. This can be helpful for identifying the processes.

The Oracle HTTP Server (OHS) service starts up multiple instances of OHS to handle incoming

requests. Each of these will show up as “httpd” or “httpd.worker”, and can be monitored for

performance statistics using general UNIX tools.

Tomcat

The Tomcat service starts up one JVM and shows up as “<path>/ java -server -Xms1600m -”.

Unfortunately this can be hard to find if you have multiple JVMs running on the same machine. Usually

you can identify Tomcat by the amount of memory it is using, as normal Tomcat instances use large

amounts of memory (1.6GB or more). You can monitor the performance statistics of Tomcat using

general UNIX tools.

WebLogic

The WebLogic service starts up one JVM and shows up as “<path>/ java -server -XX:MaxPer”

(differs slightly from the Tomcat instance). Unfortunately this can be hard to find if you have multiple

JVMs running on the same machine. Usually you can identify WebLogic by the amount of memory it is

using, as normal WebLogic instances use large amounts of memory (1.6 GB or more). You can

monitor the performance statistics of WebLogic using general UNIX tools. You can also get detailed

performance statistics from the WebLogic console. Follow the steps under the Microsoft Windows

section in the Operating System Monitoring Tools section.

SAR

The “sar” command-line utility displays CPU activity. Running “sar 10 10” will run the sar command

ten times in ten second intervals. The output will show basic CPU, %nice, %system, %iowait and %

idle information.

Linux 2.4.21-37.0.1.ELsmp (spapp01) 01/30/2008

07:24:18 AM CPU %user %nice %system %iowait %idle

07:24:28 AM all 2.88 0.00 0.28 0.00 96.85

07:24:38 AM all 3.65 0.00 0.60 0.10 95.65

Oracle Transportation Management activity will show up under the %user column, high activity in the

user column would be expected on an unresponsive system. If you see significant utilization in the

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