DZone
Thanks for visiting DZone today,
Edit Profile
  • Manage Email Subscriptions
  • How to Post to DZone
  • Article Submission Guidelines
Sign Out View Profile
  • Post an Article
  • Manage My Drafts
Over 2 million developers have joined DZone.
Log In / Join
Refcards Trend Reports Events Over 2 million developers have joined DZone. Join Today! Thanks for visiting DZone today,
Edit Profile Manage Email Subscriptions Moderation Admin Console How to Post to DZone Article Submission Guidelines
View Profile
Sign Out
Refcards
Trend Reports
Events
Zones
Culture and Methodologies Agile Career Development Methodologies Team Management
Data Engineering AI/ML Big Data Data Databases IoT
Software Design and Architecture Cloud Architecture Containers Integration Microservices Performance Security
Coding Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Partner Zones AWS Cloud
by AWS Developer Relations
Culture and Methodologies
Agile Career Development Methodologies Team Management
Data Engineering
AI/ML Big Data Data Databases IoT
Software Design and Architecture
Cloud Architecture Containers Integration Microservices Performance Security
Coding
Frameworks Java JavaScript Languages Tools
Testing, Deployment, and Maintenance
Deployment DevOps and CI/CD Maintenance Monitoring and Observability Testing, Tools, and Frameworks
Partner Zones
AWS Cloud
by AWS Developer Relations
Securing Your Software Supply Chain with JFrog and Azure
Register Today

Trending

  • SRE vs. DevOps
  • Constructing Real-Time Analytics: Fundamental Components and Architectural Framework — Part 2
  • Java Concurrency: Condition
  • Turbocharge Ab Initio ETL Pipelines: Simple Tweaks for Maximum Performance Boost

Trending

  • SRE vs. DevOps
  • Constructing Real-Time Analytics: Fundamental Components and Architectural Framework — Part 2
  • Java Concurrency: Condition
  • Turbocharge Ab Initio ETL Pipelines: Simple Tweaks for Maximum Performance Boost
  1. DZone
  2. Coding
  3. Languages
  4. Analysing Garbage Collector logs with IBM Pattern Modeling and Analysis Tool

Analysing Garbage Collector logs with IBM Pattern Modeling and Analysis Tool

Achala Chathuranga Aponso user avatar by
Achala Chathuranga Aponso
·
Apr. 08, 14 · Interview
Like (0)
Save
Tweet
Share
9.85K Views

Join the DZone community and get the full member experience.

Join For Free
Steps
1)  Add the following GC parameters to your program

-Xloggc:C:/codelatest1/gc.log -XX:+PrintGCDetails -XX:+PrintGCTimeStamps

The GC log will be available at given path : e.g: “C:/ix3codelatest1”

 0.951: [GC [PSYoungGen: 65600K->4770K(76480K)] 65600K->4778K(251264K), 0.0033514 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
1.864: [GC [PSYoungGen: 70370K->7520K(76480K)] 70378K->7536K(251264K), 0.0201201 secs] [Times: user=0.06 sys=0.00, real=0.02 secs]
2.682: [GC [PSYoungGen: 73120K->10862K(76480K)] 73136K->12362K(251264K), 0.0103230 secs] [Times: user=0.08 sys=0.00, real=0.01 secs]
3.079: [GC [PSYoungGen: 76462K->10865K(142080K)] 77962K->15033K(316864K), 0.0086661 secs] [Times: user=0.00 sys=0.00, real=0.01 secs]
12.582: [GC [PSYoungGen: 142065K->10865K(142080K)] 146233K->23858K(316864K), 0.0140113 secs] [Times: user=0.06 sys=0.00, real=0.01 secs]
13.182: [GC [PSYoungGen: 142065K->21330K(144896K)] 155058K->34324K(319680K), 0.0156760 secs] [Times: user=0.06 sys=0.02, real=0.01 secs]
15.334: [GC [PSYoungGen: 144082K->23396K(146176K)] 157076K->40923K(320960K), 0.0177733 secs] [Times: user=0.06 sys=0.00, real=0.02 secs]
16.214: [GC [PSYoungGen: 146148K->24253K(139648K)] 163675K->44046K(314432K), 0.0144303 secs] [Times: user=0.01 sys=0.00, real=0.01 secs]
16.982: [GC [PSYoungGen: 135357K->14211K(142912K)] 155150K->46556K(317696K), 0.0163956 secs] [Times: user=0.06 sys=0.00, real=0.02 secs]
17.577: [GC [PSYoungGen: 125315K->6609K(141440K)] 157660K->48635K(316224K), 0.0112545 secs] [Times: user=0.03 sys=0.02, real=0.01 secs]
18.330: [GC [PSYoungGen: 119185K->5550K(142912K)] 161211K->52764K(317696K), 0.0080298 secs] [Times: user=0.08 sys=0.00, real=0.01 secs]
18.383: [GC [PSYoungGen: 118126K->32K(142976K)] 165340K->51356K(317760K), 0.0039696 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
18.434: [GC [PSYoungGen: 112672K->64K(112704K)] 163996K->51388K(287488K), 0.0016584 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
18.484: [GC [PSYoungGen: 112704K->32K(143616K)] 164028K->51372K(318400K), 0.0018724 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
18.782: [GC [PSYoungGen: 112416K->2650K(115072K)] 163756K->53991K(289856K), 0.0033702 secs] [Times: user=0.00 sys=0.00, real=0.00 secs]
19.697: [GC [PSYoungGen: 115034K->4080K(143872K)] 166375K->57334K(318656K), 0.0052543 secs] [Times: user=0.00 sys=0.00, real=0.01 secs]
20.514: [GC [PSYoungGen: 117680K->3504K(142656K)] 170934K->59344K(317440K), 0.0052851 secs] [Times: user=0.02 sys=0.00, real=0.00 secs]
.
.
.
.
.

In order to get a meaningful picture of the GC log , IBM Pattern Modeling and Analysis Tool can be used.
“IBM Pattern Modeling and Analysis Tool  - (PMAT) analyzes verbose GC traces by parsing the traces and building pattern models. PMAT recommends key configurations by executing a diagnosis engine and pattern modeling algorithm. If there are any errors related with Java heap exhaustion or fragmentation in the verbose GC trace, PMAT can diagnose the root cause of failures. PMAT provides rich chart features that graphically display Java heap usage.”
“The following features are included:
  • GC analysis
  • GC table view
  • Allocation failure summary
  • GC usage summary
  • GC duration summary
  • GC graph view
  • GC pattern analysis
  • Zoom in/out/selection/center of chart view
  • Option of changing chart color.”
More details available here
The tool can also parse Java HotSpot garbage collector traces, including the following:
  • Serial collector
  • Throughput/parallel collector
  • Concurrent collector
  • Incremental/train collector
To run IBM – PMAT ,
========================================================
Download the jar from here
Click file and the  open the GC log.
==========================================================
It will provide details about Out of Memory Errors , GC completed , Overhead etc …









 

garbage collection Garbage (computer science)

Published at DZone with permission of Achala Chathuranga Aponso, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

Trending

  • SRE vs. DevOps
  • Constructing Real-Time Analytics: Fundamental Components and Architectural Framework — Part 2
  • Java Concurrency: Condition
  • Turbocharge Ab Initio ETL Pipelines: Simple Tweaks for Maximum Performance Boost

Comments

Partner Resources

X

ABOUT US

  • About DZone
  • Send feedback
  • Careers
  • Sitemap

ADVERTISE

  • Advertise with DZone

CONTRIBUTE ON DZONE

  • Article Submission Guidelines
  • Become a Contributor
  • Visit the Writers' Zone

LEGAL

  • Terms of Service
  • Privacy Policy

CONTACT US

  • 600 Park Offices Drive
  • Suite 300
  • Durham, NC 27709
  • support@dzone.com

Let's be friends: