How to Enable Java 9 GC Logs

How to Enable Java 9 GC Logs

GC logs are vital artifacts to troubleshoot memory/CPU related problems and optimize applications performance. In Sep 2017, the much-awaited Java 9 was released and GC logging was re-implemented using the Unified GC logging framework (JEP 271).

The Unified logging framework is a new initiative to introduce a common logging systems for all components of JVM (compiler, gc, classload, metaspace, svc, jfr, etc.)

Enable Java 9 GC Logs

To enable GC logging in Java 9, a new system property has been introduced. You need to pass this system property during application startup:




In the Java 9 release, 43 GC logging flags were removed. Yes, they are removed, not even deprecated. JVM will not start if old GC flags are passed. Thus, you are forced to replace these flags in Java 9. This table summarizes the old Flags and their equivalents in Java 9.

Analysis Tools

The GC log format was completely changed in Java 9. To analyze Java 9 GC logs, it is highly recommended that you use GC log analysis tools such as GCeasy or HPJmeter. These tools parse Java 9 GC logs and generate great graphical visualizations of the data, as well as reports on key performance indicators and several other useful metrics.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes