R12 EBS: Output Post Processor not working due to JVM error

The article "EBS: OPP does not work After Platform Migration ; Conflicting Collector Combinations ; Could not Create the Java Virtual Machine" can be found on My Oracle Support via note ID 2103349.1 which tells us why this happened AND also more details that could be useful in your toolbox about "developer parameters" or environmental files being used!

EBS 12.2.4: Forms server crashes after JVM heap size change

Either needing to upgrade from 11.5.10, 12.1, or a lower version of 12.2, you need to be aware of what I found in MOS note "Forms Server Fails With "Could not reserve enough space for object heap" Changing JVM Heap Size To 2G In 12.2.4" from document ID 2014509.1 because increasing heap size here can actually cause you problems instead of resolving them!

OEM: Using JVM Diagnostics for stuck threads

A few months ago I posted about JVM Diagnostics in OEM to tune JVMs and heap size, but did you know that it can be used to diagnose stuck threads as well?  This article was really in depth and had a lot of great visuals to explain what was being described, so if you are interested in finding out how to use this or if you want to license the option, click on the link and take a gander.

Customizing different heap sizes for multiple WebLogic servers

Were you aware that it is possible to give different servers in your WebLogic domain different heap size values?  I did not know that either until I read MOS document "How to Customize Different Heap Sizes for Different Servers in a WebLogic Domain" found via note ID 1924617.1 for how to change the JVM heap to be the same for all servers in the domain and also how to specify different JVM memory values between Admin and the managed servers in the domain.

Learn more about JVMs by tuning with JVM Diagnostics

I think we have all been there.  Garbage Collection (GC) for Java Virtual Machines are chewing up your server processing power and once they are done with the server they need to be rebooted.  Instead of a perpetual "throw memory at it" type of solution, take a gander at this post from Oracle.  Were you aware that the JVMD (Java Virtual Machine Diagnostics) tool was part of Oracle Enterprise Manager which is licensed with several other Management Packs?  Is this already in your environment, licensed, and just sitting there gathering dust?  What if you cannot use the tool?  Read the post anyways, and learn about things like "Eden space" or different algorithms to use for your GC!

Weekend Learning: JDBC/JVM connection troubleshooting

Have you made sure you have every little bit of performance from your system?  Well here is another way to squeeze out a little more performance from your system by visiting My Oracle Support note "Please update JDBC settings following MOS Basic troubleshooting of JVM consuming CPU or too many JDBC connections in EBS Apps 11i" via document ID 370583.1 and even if you are on R12 there are some nuggets of information that may interest you including a linked document towards the end of the article which is not exclusive for 11i.