List/Grid Tag Archives: Performance and Scalability
Common pitfalls in benchmarking
Every once in awhile each and every one of us is trying to measure performance of certain parts of the code. It can be either a fully functional application measured against specific ...
How expensive is a method call in Java
We have all been there. Looking at the poorly designed code while listening to the author’s explanations about how one should never sacrifice performance over design. And you just ...
High performance libraries in Java
There is an increasing number of libraries which are described as high performance and have benchmarks to back that claim up. Here is a selection that I am aware of. Disruptor library ...
Using a memory mapped file for a huge matrix
Overview Matrices can be really large, sometimes larger than you can hold in one array. You can extend the maximum size by having multiple arrays however this can make your heap size ...
What is NoSQL ?
NoSQL is a term used to refer to a class of database systems that differ from the traditional relational database management systems (RDBMS) in many ways. RDBMSs are accessed using ...
High Performance JPA with GlassFish and Coherence – Part 3
In this third part of my four part series I’ll explain strategy number two of using Coherence with EclipseLink and GlassFish. This is all about using Coherence as Second Level ...
High Performance JPA with GlassFish and Coherence – Part 2
In this second part of my four part series I’ll explain strategy number one of using Coherence with EclipseLink and GlassFish.This describes the steps you have to take to configure ...
High performance JPA with GlassFish and Coherence – Part 1
Have you heard about Coherence before? Probably yes. It’s one of those famous in-memory grid solutions promising awesome fast data access and unlimited space for your ...
Java Secret: Loading and unloading static fields
OVERVIEW To start with it is natural to assume that static fields have a special life cycle and live for the life of the application. You could assume that they live is a special place ...
Monitoring OpenJDK from the CLI
Currently I do quite a bit of work in and around the Java virtual machine (JVM), most of the time on Linux. When things go awry and I am trying to establish why, I reach for the Java ...
