Axis RightFax 8.5 Przewodnik Instalacji Pobierz pdf (Strona 74)

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<OTM_INSTALL_DIR>/jdk/bin/jrcmd <PID> jrarecording time=300

filename=<OTM_INSTALL_DIR>/logs/perfIssue.xml.zip

threaddumpinterval=30s

Please note the time is in seconds and this can be modified to any number of seconds. The directory

and filename can also be changed.

The JRA utility will write to the file for the entire time interval specified. Every time you run it, you

would probably want a new filename to help differentiate between the different records. You can

always just save the file off somewhere else and rename it. JRA will record until the time interval is

over, and then stop. There is no manual intervention needed to turn off the profiler (JRA recording).

Database Monitoring Tools

Oracle Enterprise Manager includes several tools which are critical to monitoring the performance of

the Oracle Database. Two of these tools are Automatic Workload Repository (AWR) and Automatic

Database Diagnostic Monitor (ADDM), both of which are included in the Diagnostics Pack.

Automatic Workload Repository

By default snapshots of the relevant data are taken every hour and retained for seven days. The data

is accessed via a report by running awrrpt.sql or awrrpti.sql. The automated workload repository

administration tasks have been included in Enterprise Manager. The Automatic Workload Repository

page is accessed from the main page via Administration > Workload Repository (under the Workload

section).

Automatic Database Diagnostic Monitor

ADDM analyzes data in the Automatic Workload Repository to identify potential performance

bottlenecks. For each of the identified issues it locates the root cause and provides recommendations

for correcting the problem. An ADDM analysis task is performed and its findings and recommendations

stored in the database every time an AWR snapshot is taken.

The best place to start viewing ADDM reports is Enterprise Manager. The Performance Analysis section

on the Home page is a list of the top five findings from the last ADDM analysis task. Specific reports

can be produced by clicking on the Advisor Central link, then the ADDM link. The resulting page allows

you to select a start and end snapshot, create an ADDM task and display the resulting report by

clicking on a few links. Alternatively the addmrpt.sql script can be used to create an ADDM report

from SQL*Plus.

Network Monitoring

Due to the heavy traffic between the client, web, application, and database, a small change in network

latency can have a significant impact on system performance. System monitoring tools will be helpful

in diagnosing network performance issues. Generally speaking though, network performance issues

are one of the most difficult to identify. Maintaining benchmarks of good network performance that

can be referenced during performance issues is a good practice.

Diagnosing a Performance Issue

Steps for Diagnosing a Performance Issue

1. Determine the scope of the problem.

 Is this issue affecting one user or many users?

 Can new users login to Oracle Transportation Management?

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Axis RightFax 8.5 Przewodnik Instalacji Strona 74