Solved

How to read the output of "jstat  -gcutil <PID>?"

Posted on 2014-11-17
1
701 Views
Last Modified: 2014-11-23
I am running the tomcat server and getting heap memory related error in catalina.out when I execute "jstat  -gcutil <PID>" I see following:

/usr/java/jdk1.7.0_25/bin/jstat  -gcutil 47929 
  S0     S1     E      O      P     YGC     YGCT    FGC    FGCT     GCT   
  0.00   0.00  68.46 100.00  57.08  44539 5829.704 303497 241552.104 247381.808

Open in new window


How to read above output? what is S0/S1/E/O/P and does it doing full GCing? Thanks!
0
Comment
Question by:beer9
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 21

Accepted Solution

by:
Amitkumar Panchal earned 500 total points
ID: 40448928
S0 =      Survivor space 0 utilization as a percentage of the space's current capacity.
S1 = Survivor space 1 utilization as a percentage of the space's current capacity.
E = Eden space utilization as a percentage of the space's current capacity.
O = Old space utilization as a percentage of the space's current capacity.
P = Permanent space utilization as a percentage of the space's current capacity.
YGC = Number of young generation GC events.
YGCT = Young generation garbage collection time.
FGC = Number of full GC events.
FGCT = Full garbage collection time.
GCT = Total garbage collection time.


Refer the documentation at https://docs.oracle.com/javase/7/docs/technotes/tools/share/jstat.html#gcutil_option

Additionally you can refer http://www.cs.lafayette.edu/docs/java/tooldocs/share/jstat.html also.
0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Upgrading Tomcat – There are a couple of methods to upgrade Tomcat is to use The Apache Installer is to download and unzip and run the services.bat remove|install Tomcat6 Because of the App that we are working with, we can only use Tomcat 6.…
Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers will learn about basic arrays, how to declare them, and how to use them. Introduction and definition: Declare an array and cover the syntax of declaring them: Initialize every index in the created array: Example/Features of a basic arr…
Suggested Courses

615 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question