The nmon (Nigel’s Monitor) tool was written initially for AIX to monitor system performance, but there are plenty of distributions available now so people can use it on a variety of operating systems these days, including flavours of Linux and even the recent Raspberry Pi (mini ARM based computer). It’s one of my favourite performance monitoring tools
Generally speaking, the Java heap memory utilization for your Oracle Management Service (OMS) should be averaging at under 75%, and anything over this could mean the Garbage Collection starts impacting the performance of your Enterprise Manager experience. If you’re using the “out-of-the-box” notification rules, then an OMS suffering such symptoms may start churning out events like this:
Having only recently started using VirtualBox to build various VMs (Virtual Machines), it wasn’t immediately obvious to me how I could not only enable access to the outside world (Internet access, updates etc.), but also enable SSH to Linux boxes and such like via a private network within VirtualBox. Eventually, I decided to configure each
This morning I had a number of ADF based applications to deploy against a new WebLogic 11g domain. When I tried to activate the changes, I hit the following error (the log file revealed nothing further): An error occurred during activation of changes, please see the log for details. [J2EE:160149]Error while processing library references. Unresolved
First of all, you need to install WebLogic 11g if you haven’t already done so. Both WebLogic 10.3.5 and 10.3.6 versions are supported against Forms and Reports 11gR2, using either Java 6 or 7 JDKs. Once WebLogic has been installed, ensure all of the requirements specific to your OS have been met, and that any missing packages are
In this post I’m creating a simple WebLogic 10.3.6 cluster domain with two Managed Servers, across two Linux machines, named linux01.vbox and linux02.vbox. Obviously you need to have already installed WebLogic 11g at this point. There are a few different ways you can create a cluster domain in WebLogic, but I usually start with the GUI wizard and
I’m going to create a simple domain called “SnapDomain” in WebLogic 12c (12.1.1) here with an Admin Server, and single Managed Server running from the same machine: linux01 (192.168.28.11). Ensure your environment is set correctly, then start-up the GUI: . ~/set_wls12.env cd $WLS_HOME/common/bin ./config.sh Once the GUI starts, respond as follows: Welcome Create a new WebLogic
First of all, I’m assuming here that the “oracle” user, groups etc. have already been created here. If not, take a look at “Create oracle user and groups” under my Linux installation post here. I’m using the WebLogic 11gR1 generic package installer (which is used for all 64-bit platforms) to do this installation on Linux
First of all, you need the OS installation media, which can be downloaded from the Oracle Software Delivery Cloud at http://edelivery.oracle.com/linux (login required). For this particular installation, I downloaded ‘Oracle Linux Release 6 Update 4 Media Pack for x86_64 (64 bit)’ which is listed as part V37084-01. In this instance, I then created a Virtual Machine using VirtualBox
In this example, I’m creating a simple Oracle Listener service called ‘LISTENER’ using the default port of 1521. Start the Oracle Net Configuration Assistant (NETCA) Open an X-Windows session to the server as the ‘oracle’ user. Set your ORACLE_HOME environment variable appropriately, then start the assistant by running the following: export ORACLE_HOME=/u01/app/oracle/product/11.2.0.3 $ORACLE_HOME/bin/netca Once the GUI