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So, what is the more methodical approach to understanding the programming problem related to a memory problem?
This is answered by understanding the memory heap of applications and the distribution when the out of memory happens.
To set the maximum heap size you can add a property value to the rcpinstall.properties file.
Any software developer who has worked with Java-based enterprise-class backend applications would have run into this infamous or awkward error from a customer or QA engineer: To understand this, we have to go back to the computer science fundamentals of the complexity of algorithms, specifically "space" complexity.
In our case, we will be using the open source tool MAT by the Eclipse Foundation. We will go through a sequence of steps that will help explore the different features and views of MAT to get to an example of an OOM heap dump and think through the analysis. The above tells us that there were 454,570 JVM finalizer instances occupying almost 50% of the allocated application memory. What does this lead us to understand, based on the basic assumption that the reader knows what Java Finalizers do?
Read here for a primer: Essentially, there are custom finalizers written by the developer to release certain resources held by an instance.
Without understanding what caused the heap usage inflation or spike, memory usage stability (hence application stability) is not guaranteed.
These instances that are collected by the finalizers are collected outside the scope of the JVM GC collection algorithms using a separate queue.
Essentially, this is a longer path to cleaning up by the GC.
Let this be handled by the gencon garbage collector itself. For me it now takes about a minute to process a 1 GB heap. ---Jeroen Troubleshooting Out Of Memory Errors Processing large dump files Processing large dump files using Memory Analyzer may sometimes fail with a The default maximum Java heap size when running ISA 4.1 is 256Mb.
messag e ID=14217619 and some more digging, I found that the vm arguments are set in the file: jvm.properties in location on my disk: C:\Program Files (x86)\IBM\IBM Support Assistant v41\rcp\eclipse\plugins\rcp.j2se.win32.x86_126.96.36.199 90211a-200903301321\ I recommend removing the -Xmn parameter for the new space size.
For an explanation of why so many of them are not collected, we start reviewing code.