InfoWorld

Java Tip 130: Do you know your data size?

Recently, I helped design a Java server application that resembled an in-memory database. That is, we biased the design toward caching tons of data in memory to provide super-fast query performance.
TheServerSide

Fix Java memory leaks without costly JVM heap dumps by example

Community driven content discussing all aspects of software development from DevOps to design patterns. I don’t know anyone who likes investigating a Java heap dump. They can be massive — literally ...
GitHub

Java Heap Space Error When Running iSweep on Regions with Excess IBD

#!/bin/bash #SBATCH --job-name="ISweep" #SBATCH --mem-per-cpu=250G #SBATCH --cpus-per-task=1 #SBATCH -t 7-00:00:00 # Maximum execution time (D-HH:MM) #SBATCH --mail ...
GitHub

[Bug]: OutOfMemoryError: Java Heap Space - When Processing Many Files via Pipeline

java.lang.OutOfMemoryError: Java heap space at java.base/java.nio.file.Files.read(Files.java:3231) at java.base/java.nio.file.Files.readAllBytes(Files.java:3288) at ...
TheServerSide

WebSphere Portal 7 Performance Tips: Changing the Heap Size & Verbose Garbage Collection

When I speak about WebSphere Portal, I often get drawn into discussions related to performance. One of my favorite comments is to: “Uninstall WebSphere Portal and switch to Apache JetSpeed.” I feel ...
InfoWorld

Sizeof for Java

Q: Does Java have an operator like sizeof() in C? A: A superficial answer is that Java does not provide anything like C’s sizeof(). However, let’s consider why a Java programmer might occasionally ...