OEM - Chronicles of Technology

OEM

A collection of 18 posts

Monitor JMS queues through OEM 13c

If you have the WebLogic Management Pack for Oracle Enterprise Manager (OEM), you can monitor a slew of metrics. Often, I am asked if OEM can monitor if there are pending messages in a WebLogic JMS queue or topic. The answer is "sort of." You can set warning

Adding a new WebLogic Domain target to OEM

Adding an Oracle Fusion Middleware/WebLogic Domain target to OEM is not that difficult, albeit must be done manually. Simply navigate to the gear icon, then Add Target > Add Targets Manually. Click on Add Using Guided Process. Now select Oracle Fusion Middleware/WebLogic Domain then click Add. Enter the

Removing a WebLogic Domain from OEM Cloud Control

When you add a WebLogic Domain target to OEM, it automatically adds a number of target types included in this domain such as Application Deployments, Oracle WebLogic Server, Oracle Coherence Cache, Email Driver, and so on. It's not unusual to have hundreds of targets automatically added any time

Checking the 2-way communication between OMS and OEM Agent

The Oracle Enterprise Manager (OEM) Cloud Control Agent is installed on each host in your environment. This can be a Linux, Windows, or Solaris host, and typically (though not necessarily) there is 1 agent installed per host. The OEM Agent listens on a default HTTP (or HTTPS) port 3872. You

Yet another custom OEM uptime report

Here is my custom availability report in Oracle Enterprise Manager (OEM) 13c (using Information Publisher). It consists of multiple elements across multiple rows. Though this report is specific to WebLogic Managed Servers, it could apply to any target type. Each element is a distinct query: SELECT a.availability_status "

Create a custom OEM uptime report for business hours only

There was a need to create a custom Information Publisher Report in Oracle Enterprise Manager 13c to provide uptime metrics. These uptime metrics were to be calculated weekly, from Monday to Friday, only for the hours of 8am to 5pm, and for specific targets. Any target status of Up, System

Create a custom metric extension in OEM 13c

Create a custom metric extension in OEM 13c

Oracle Enterprise Manager (OEM) 13c is a solid and comprehensive monitoring tool, providing a long list of monitoring metrics across a large number of target types. But there are bound to be certain custom checks you'd like to perform that are not natively provided by the product. To

Querying incidents in OEM 13c

Unfortunately, the Incident Manager page in Oracle Enterprise Manager 13c is slow, cumbersome, and lacks customization. Running an SQL query against the OMS repository is extremely quick and efficient and you can get exactly what you need. Here is a simple query to pull incidents for a particular set of

Unsafe writes - why you need it.

Unsafe writes - why you need it.

As a former Oracle DBA, I'm totally against anything marked as "unsafe." Today I have learned why RedHat Ansible [https://www.ansible.com] has unsafe_writes clause for some commands. Here is a real-life scenario. Let say you have Oracle EM Agent installed on the target

Changing the WebLogic password on OEM Agents

This post describes the steps needing to be done on the OEM Agent if the WebLogic password used to connect has been changed. It needs only be changed once per domain. This same set of instructions can be used if you decide to use an alternate WebLogic account as well.

Oracle SOA Suite

Getting continuous "MBean attribute access denied" in SOA logs due to OEM Agent

Recently, we started getting continuous errors every few seconds in our Oracle SOA Suite logs (specifically in the SOA managed server standard out log). The entire exception is shown here: <Sep 11, 2019 9:27:41 PM EDT> <Error> <oracle.as.jmx.framework.generic.spi.

OEM 13c custom certificate drama

OEM 13c custom certificate drama

For years I have so much of questionable syntax, partial automation support, and non-human design in Oracle products, so I could get anything with the perfect poker face. However, Oracle [https://www.oracle.com] always has a way to give a little bit of fun, for example, with the long-lasting

Customizing Oracle Enterprise Manager 12c/13c email notifications

The email alerts generated from Oracle Enterprise Manager Cloud Control are not the most appealing visually, with formatting not easy on the eyes and includes a slew of unnecessary information and clutter. To customize email notification in OEM Cloud Control 12c/13c, login as SYSMAN and navigate to Setup >

Inspect 'em_prereqs_results.xml' for OEM Agent installation errors

In rare cases, the Oracle Enterprise Manager Cloud Control Agent may fail during the installation, and the cause of the installation failure can be found in any of the .err, .log, or .out files. In one particular instance, the installation of an OEM Agent 13.2 failed, but there was

Oracle SOA Suite

Custom .bash_profile for Oracle Fusion Middleware

I have created some crude custom .bash_profile scripts that I use to make things easy for me after I install some of the various Oracle Fusion Middleware products. Oracle HTTP Server (OHS) 12c export PS1="\u@\h:\$PWD> " export DISPLAY=:1 export MW_HOME=/u01/oracle/

Always Disable Auto Licensing in OEM Cloud Control

Always Disable Auto Licensing in OEM Cloud Control

Oracle Enterprise Manager Cloud Control is a free product, but is extremely limited in functionality without paying for the additional management packs. These management packs offer a slew of necessary features and are licensed separately. By default, the OEM Cloud Control product allows you to install and monitor any target

OEM 12c: Elusive NodeManager

OEM 12c: Elusive NodeManager

I have spent a few very confusing hours in desperate attempts to figure out why OMS instance won't start. The command output suggests checking the NodeManager log file. But it has no new entries, in fact, the file wasn't accessed at all.

Use emcli to download and install Oracle Management Agent 13c

Use emcli to download and install Oracle Management Agent 13c

You can use emcli (Enterprise Manager Command Line Interface) to download any number of versions of the Oracle Management Agent from the Oracle Management Server (OMS). The instructions in this blog post are specific to Oracle Enterprise Manager Cloud Control 13.3.0. Download Agent from OMS using emcli On