how to understand the gc log?

[#1]

Hi,

Can you give me some suggestions on where I should start to learn GC tuning? Is there any good tutorial? Thank you very much!

[#2 · Accepted solution]

@Ai

Here are some very good reference points/blogs on GC :

Links:

0. http://middlewaremagic.com/weblogic/?p=5131

1. https://dzone.com/articles/understanding-garbage-collection-log

2. https://blogs.oracle.com/poonam/entry/understanding_g1_gc_logs (G1 GC)

3. https://blogs.oracle.com/poonam/entry/understanding_cms_gc_logs (CMS)

4. https://blog.tier1app.com/2016/04/06/gc-logging-user-sys-real-which-time-to-use/

5. https://plumbr.eu/java-garbage-collection-handbook

6. http://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html

.

Tools : Following is the link where you can upload your GC log and have it parsed in just few seconds and get a report.

1. http://gceasy.io/ (Online means internet access is needed for this utility)

2. https://sourceforge.net/projects/gcviewer/ (Offline)

3. https://code.google.com/archive/a/eclipselabs.org/p/garbagecat (Offline

.

[#3]

Hi,

@Ai

You will get a complete guide here about JVM Performance tuning here.