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HPjmeter

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HPjmeter Version 3.1 User's Guide

HP Part Number: 5991-6757

Published: November 2006

END USER LICENSE AGREEMENT FOR SOFTWARE

PLEASE READ CAREFULLY: THE USE OF THE SOFTWARE IS SUBJECT TO THE TERMS AND CONDITIONS THAT FOLLOW (“AGREEMENT”), UNLESS THE SOFTWARE IS SUBJECT TO A SEPARATE LICENSE AGREEMENT BETWEEN YOU AND HP OR ITS SUPPLIERS. BY DOWNLOADING, INSTALLING, COPYING, ACCESSING, OR USING THE SOFTWARE, OR BY CHOOSING THE “I ACCEPT” OPTION LOCATED ON OR ADJACENT TO THE SCREEN WHERE THIS AGREEMENT MAY BE DISPLAYED, YOU AGREE TO THE TERMS OF THIS AGREEMENT, ANY APPLICABLE WARRANTY STATEMENT AND THE TERMS AND CONDITIONS CONTAINED IN THE “ANCILLARY SOFTWARE” (as defined below). IF YOU ARE ACCEPTING THESE TERMS ON BEHALF OF ANOTHER PERSON OR A COMPANY OR OTHER LEGAL ENTITY, YOU REPRESENT AND WARRANT THAT YOU HAVE FULL AUTHORITY TO BIND THAT PERSON, COMPANY, OR LEGAL ENTITY TO THESE TERMS. IF YOU DO NOT AGREE TO THESE TERMS, DO NOT DOWNLOAD, INSTALL, COPY, ACCESS, OR USE THE SOFTWARE, AND PROMPTLY RETURN THE SOFTWARE WITH PROOF OF PURCHASE TO THE PARTY FROM WHOM YOU ACQUIRED IT AND OBTAIN A REFUND OF THE AMOUNT YOU PAID, IF ANY. IF YOU DOWNLOADED THE SOFTWARE, CONTACT THE PARTY FROM WHOM YOU ACQUIRED IT.

QUANTITY OF DEVICES:

  1. GENERAL TERMS

    1. You and Your refer either to an individual person or to a single legal entity.

    2. HP means Hewlett-Packard Company or one of its subsidiaries.

    3. HP Branded means Software products bearing a trademark or service mark of Hewlett-Packard Company or any Hewlett-Packard Company Affiliate, and embedded HP selected third party Software that is not offered under a third party license agreement.

    4. Software means machine-readable instructions and data (and copies thereof) including middleware and related updates and upgrades You may be separately authorized to receive, licensed materials, user documentation, user manuals, and operating procedures. “Ancillary Software” means all or any portion of Software provided under public, open source, or third party license terms.

    5. Specification means technical information about Software products published in HP product manuals, user documentation, and technical data sheets in effect on the date HP delivers Software products to You.

    6. Transaction Document(s) means an accepted customer order (excluding pre-printed terms) and in relation to that order, valid HP quotations, license to use certificates or invoices.

  2. LICENSE TERMS AND RESTRICTIONS

    1. Subject to the terms and conditions of this Agreement and the payment of any applicable license fee, HP grants You a non-exclusive, non-transferable license to Use (as defined below) in object code form one copy of the Software on one device at a time for Your internal business purposes, unless otherwise indicated above or in applicable Transaction Document(s). “Use” means to install, store, load, execute and display the Software in accordance with the Specifications. Your Use of the Software is subject to these license terms and to the other restrictions specified by HP in any other tangible or electronic documentation delivered or otherwise made available to You with or at the time of purchase of the Software, including license terms, warranty statements, Specifications, and “readme” or other informational files included in the Software itself. Such restrictions are hereby incorporated in this Agreement by reference. Some Software may require license keys or contain other technical protection measures. You acknowledge that HP may monitor your compliance with Use restrictions remotely or otherwise. If HP makes a license management program available which records and reports license usage information, You agree to appropriately install, configure and execute such license management program beginning no later than one hundred and eighty (180) days from the date it is made available to You and continuing for the period that the Software is Used.

    2. This Agreement confers no title or ownership and is not a sale of any rights in the Software. Third-party suppliers are intended beneficiaries under this Agreement and independently may protect their rights in the Software in the event of any infringement. All rights not expressly granted to You are reserved solely to HP or its suppliers. Nothing herein should be construed as granting You, by implication, estoppel or otherwise, a license relating to Software other than as expressly stated above in this section 2.

    3. Unless otherwise permitted by HP, You (a) may only make copies or adaptations of the Software for archival purposes or when copying or adaptation is an essential step in the authorized Use of the Software on a backup device, provided that copies and adaptations are used in no other manner and provided further that the Use on the backup device is discontinued when the original or replacement device becomes operable, and (b) may not copy the Software onto or otherwise Use or make it available on, to, or through any public or external distributed network.

    4. To Use Software identified as an update or upgrade, You must first be licensed for the original Software identified by HP as eligible for the update or upgrade. If the update or upgrade is intended to substantially replace the original Software, after updating or upgrading, You may no longer Use the original Software that formed the basis for Your update or upgrade eligibility unless otherwise provided by HP in writing. Nothing in this Agreement grants You any right to purchase or receive Software updates, upgrades, or support, and HP is under no obligation to make such support available to you. Updates, upgrades, enhancements, or other Support may only be available under separate HP support agreements. You may contact HP to learn more about any support offerings HP may make available. HP reserves the right to require additional licenses and fees for Software upgrades or other enhancements, or for Use of the Software on upgraded devices.

    5. You must reproduce all copyright notices that appear in or on the Software (including documentation) on all permitted copies or adaptations. Copies of documentation are limited to internal use.

    6. Notwithstanding anything to the contrary herein, if the Transaction Document(s) identifies that the Software may be utilized on another Designated System(s) (as defined below), Your license to Use the Software may be transferred to another Designated System(s). A “Designated System” means a computer system owned, controlled, or operated by or solely on behalf of You and may be further identified by HP by the combination of a unique number and a specific system type. Such license will terminate in the event of a change in either the system number or system type, an unauthorized relocation, or if the Designated System ceases to be within Your possession or control.

    7. Operating system Software may only be Used when operating the associated hardware in configurations as approved, sold, or subsequently upgraded by HP or an HP authorized reseller.

    8. Software is not specifically designed, manufactured, or intended for use as parts, components, or assemblies for the planning, construction, maintenance, or direct operation of a nuclear facility. You are solely liable if Software is Used for these applications and will indemnify and hold HP harmless from all loss, damage, expense, or liability in connection with such Use.

    9. You will not modify, reverse engineer, disassemble, decrypt, decompile, or make derivative works of the Software. Where You have other rights mandated under statute, You will provide HP with reasonably detailed information regarding any intended modifications, reverse engineering, disassembly, decryption, or decompilation and the purposes therefore.

    10. Extending the Use of Software to any person or entity other than You as a function of providing services, (i.e.; making the Software available through a commercial timesharing or service bureau) must be authorized in writing by HP prior to such Use and may require additional licenses and fees. You may not distribute, resell, or sublicense the Software.

    11. Notwithstanding anything in this Agreement to the contrary, all or any portion of the Software which constitutes Ancillary Software is licensed to You subject to the terms and conditions of the Software license agreement accompanying such Ancillary Software, whether in the form of a separate agreement, shrink wrap license or electronic license terms accepted at time of download. Use of the Ancillary Software by You shall be governed entirely by the terms and conditions of such license and, with respect to HP, by the limitations and disclaimers of sections 3 and 5 hereof. HP has identified any Ancillary Software by either noting the Ancillary Software provider's ownership within each Ancillary Software program file and/or by providing information in the “ancillary.txt” or “readme” file that is provided as part of the installation of the Software. The Ancillary Software licenses are also set forth in the “ancillary.txt” or “readme” file. By accepting the terms and conditions of this Agreement, You are also accepting the terms and conditions of each Ancillary Software license in the ancillary.txt or “readme” file. If the Software includes Ancillary Software licensed under the GNU General Public License and/or under the GNU Lesser General Pubic License ("GPL Software"), a complete machine-readable copy of the GPL Software Source Code ("GPL Source Code") is either: (i) included with the Software that is delivered to You; or (ii) upon your written request, HP will provide to You, for a fee covering the cost of distribution, a complete machine-readable copy of the GPL Source Code, by mail, or (iii) if You obtained the Software by downloading it from a HP website and neither of the preceding options are available, you may download the GPL Source Code from the same website. Information about how to make a written request for GPL Source Code may be found in the ancillary.txt file or, if an address is not listed in that file, at the following website: www.hp.com.

  3. WARRANTY

    (i) IF SOFTWARE IS PROVIDED WITHOUT A LICENSE FEE, THE FOLLOWING AS-IS WARRANTY STATEMENT APPLIES TO THE SOFTWARE

    DISCLAIMER OF WARRANTIES:

    TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, HP AND ITS SUPPLIERS PROVIDE THE SOFTWARE “AS IS” AND WITH ALL FAULTS, AND HEREBY DISCLAIM ALL INDEMNITIES, WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED, WHETHER BY STATUE, COMMON LAW, CUSTOM OR OTHERWISE, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF TITLE AND NON-INFRINGEMENT, ANY IMPLIED WARRANTIES, DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE, AND OF LACK OF VIRUSES. HP does not warrant that the operation of Software will be uninterrupted or error free or that the Software will meet Your requirements. Some states/jurisdictions do not allow exclusion of implied warranties or limitations on the duration of implied warranties, so the above disclaimer may not apply to You in its entirety.

    (ii) IF SOFTWARE IS PROVIDED FOR A LICENSE FEE, THE FOLLOWING LIMITED WARRANTY APPLIES TO THE SOFTWARE:

    1. HP Branded Software will materially conform to its Specifications. If a warranty period is not specified for HP Branded Software, the warranty period will be ninety (90) days from the delivery date, or the date of installation if installed by HP. If You schedule or delay installation by HP more than thirty (30) days after delivery, the warranty period begins on the 31st day after delivery. This limited warranty is subject to the terms, limitations, and exclusions contained in the limited warranty statement provide for Software in the country where the Software is located when the warranty claim is made.

    2. HP warrants that any physical media containing HP Branded Software will be shipped free of viruses.

    3. HP does not warrant that the operation of Software will be uninterrupted or error free, or that Software will operate in hardware and Software combinations other than as expressly required by HP in the Specifications or that Software will meet requirements specified by You.

    4. HP is not obligated to provide warranty services or support for any claims resulting from:

      1. improper site preparation, or site or environmental conditions that do not conform to HP’s site specifications;

      2. Your non-compliance with Specifications;

      3. improper or inadequate maintenance or calibration;

      4. Your or third-party media, software, interfacing, supplies, or other products;

      5. modifications not performed or authorized by HP;

      6. virus, infection, worm or similar malicious code not introduced by HP; or

      7. abuse, negligence, accident, loss or damage in transit, fire or water damage, electrical disturbances, transportation by You, or other causes beyond HP’s control.

    5. HP provides third-party products, software, and services that are not HP Branded “AS IS” without warranties of any kind, although the original manufacturers or third party suppliers of such products, software and services may provide their own warranties.

    6. If notified of a valid warranty claim during the warranty period, HP will, at its option, correct the warranty defect for HP Branded Software, or replace such Software. If HP is unable, within a reasonable time, to complete the correction, or replace such Software, You will be entitled to a refund of the purchase price paid upon prompt return of such Software to HP. You will pay expenses for return of such Software to HP. HP will pay expenses for shipment of repaired or replacement Software to You. This section 3.(ii) f states HP's entire liability for warranty claims.

    7. DISCLAIMER OF WARRANTIES

      TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, EXCEPT AS EXPRESSLY WARRANTED IN SECTION 3.(ii) a and b ABOVE, HP AND ITS SUPPLIERS PROVIDE THE SOFTWARE “AS IS” AND WITH ALL FAULTS, AND HEREBY DISCLAIM ALL OTHER WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF TITLE AND NON-INFRINGEMENT, ANY IMPLIED WARRANTIES, DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR PURPOSE, AND OF LACK OF VIRUSES. Some states/jurisdictions do not allow exclusion of implied warranties or limitations on the duration of implied warranties, so the above disclaimer may not apply to You in its entirety.

  4. INTELLECTUAL PROPERTY INFRINGEMENT FOR SOFTWARE PROVIDED FOR A LICENSE FEE:

    1. In the event Software was provided to You for a License Fee, HP will defend or settle any claim against You alleging that HP Branded Software products provided under this Agreement infringes intellectual property rights in the country where they were sold, if You:

      1. promptly notify HP of the claim in writing;

      2. cooperate with HP in the defense of the claim; and

      3. grant HP sole control of the defense or settlement of the claim. HP will pay infringement claim defense costs, HP–negotiated settlement amounts, and court-awarded damages.

    2. If such a claim appears likely, then HP may modify the HP Branded Software products, procure any necessary license, or replace the affected item with one that is at least functionally equivalent. If HP determines that none of these alternatives is reasonably available, then HP will issue You a refund equal to the purchase price paid for the affected item if within one year of delivery, or Your net book value thereafter.

    3. HP has no obligation for any claim of infringement arising from:

      1. HP’s compliance with Your or third party designs, specifications, instructions, or technical information;

      2. modifications made by You or a third party;

      3. Your non-compliance with the Specifications or the documentation described in section 2. a above; or

      4. Your use with products, software, or services that are not HP Branded.

    4. This section 4 states HP's entire liability for claims of intellectual property infringement for Software provided for a license fee.

  5. LIMITATION OF LIABILITY AND REMEDIES

    Notwithstanding any damages that You might incur, and except for damages for bodily injury (including death) and for the amounts in section 4.a, the entire aggregate liability of HP and any of its suppliers relating to the Software or this Agreement, and Your exclusive remedy for all of the foregoing, shall be limited to the greater of the amount actually paid by You separately for the Software or U.S. $5.00. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL HP OR ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER INCLUDING, BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS OR REVENUES, BUSINESS INTERRUPTION, DOWNTIME COSTS, FAILURE TO REALIZE EXPECTED SAVINGS, LOSS, DISCLOSURE, UNAVAILABILITY OF OR DAMAGE TO DATA, SOFTWARE RESTORATION, OR LOSS OF PRIVACY ARISING OUT OF OR IN ANY WAY RELATED TO THE USE OF OR INABILITY TO USE THE SOFTWARE, OR OTHERWISE IN CONNECTION WITH ANY PROVISION OF THIS AGREEMENT, EVEN IF HP OR ANY SUPPLIER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND EVEN IF THE REMEDY FAILS OF ITS ESSENTIAL PURPOSE. Some states/jurisdictions do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

  6. TERMINATION

    This Agreement is effective unless terminated or rejected. Notwithstanding the foregoing, this Agreement will also terminate upon conditions set forth elsewhere in this Agreement or if You fail to comply with any term or condition hereof. Immediately upon termination You will destroy the Software and all copies of the Software or return them to HP. You may retain one copy of the Software subsequent to termination solely for archival purposes only. At HP’s request, You will certify in writing to HP that You have complied with these requirements. Sections 3.(i), 3.(ii) g, 5, 6 and 7 of this Agreement will survive termination of this Agreement.

  7. GENERAL

    1. You may not assign, sublicense, delegate or otherwise transfer (“Assign”) all or any part of this Agreement without prior written consent from HP, payment to HP of any applicable fees, and compliance with HP's Software license transfer policies and any applicable third party license terms. Any such attempted Assignment will be null and void. Where an authorized Assignment occurs in accordance with this section, Your rights under this Agreement will terminate, and You will immediately deliver the Software and all copies to the Assignee. The Assignee must agree in writing to the terms of this Agreement, and the transferee thereafter will be considered “You” for purposes of this Agreement. You may transfer firmware only upon transfer of the associated hardware.

    2. If the Software is licensed for use in the performance of a U.S. Government prime contract or subcontract, You agree that, consistent with FAR 12.211 and 12.212, commercial computer Software, computer Software documentation and technical data for commercial items are licensed under HP’s standard commercial license.

    3. To the extent You export, re-export, or import Software, technology, or technical data licensed or provided hereunder, You assume sole responsibility for complying with applicable laws and regulations and for obtaining required export and import authorizations. HP may suspend performance if You are in violation of any applicable laws or regulations.

    4. You agree that HP may audit Your compliance with this Agreement. Any such audit would be at HP’s expense, require reasonable notice, and would be performed during normal business hours. If an audit reveals underpayments then You will immediately pay HP such underpayments together with the costs reasonably incurred by HP in connection with the audit and seeking compliance with this section.

    5. This Agreement is governed by the laws of the State of California, U.S.A., excluding rules as to choice and conflict of law. You and HP agree that the United Nations Convention on Contracts for the International Sale of Goods will not apply to this Agreement.

    6. Subject to the other terms and conditions of this Agreement, this Agreement is the entire agreement between HP and You regarding Your Use of the Software, and supersedes and replaces any previous communications, representations, or agreements, or Your additional or inconsistent terms, whether oral or written. In the event any provision of this Agreement is held invalid or unenforceable the remainder of the Agreement will remain enforceable and unaffected thereby.

    7. HP’s failure to exercise or delay in exercising any of its rights under this Agreement will not constitute or be deemed a waiver or forfeiture of those rights.

HPJmeter v3.0 Ancillary Software Licenses

The following Ancillary Software is included in or with the Software:

  1. ASM 2.2.2.

  2. Jfreechart 1.0.2

  3. Oracle Help for Java 4.2.7.0.0

(1) ASM (v2.2.2) - ASM v1.3 License

ASM: a very small and fast Java bytecode manipulation framework Copyright (c) 2000-2005 INRIA, France Telecom All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  3. Neither the name of the copyright holders nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

(2) Jfreechart (v1.0.2) – LGPL Version 2.1

GNU LESSER GENERAL PUBLIC LICENSE Version 2.1, February 1999 Copyright (C) 1991, 1999 Free Software Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. [This is the first released version of the Lesser GPL. It also counts as the successor of the GNU Library Public License, version 2, hence the version number 2.1.]

Preamble. The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public Licenses are intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users.

This license, the Lesser General Public License, applies to some specially designated software packages--typically libraries--of the Free Software Foundation and other authors who decide to use it. You can use it too, but we suggest you first think carefully about whether this license or the ordinary General Public License is the better strategy to use in any particular case, based on the explanations below.

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We call this license the “Lesser” General Public License because it does Less to protect the user's freedom than the ordinary General Public License. It also provides other free software developers Less of an advantage over competing non-free programs. These disadvantages are the reason we use the ordinary General Public License for many libraries. However, the Lesser license provides advantages in certain special circumstances.

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Table of Contents

About This Document
Intended Audience
Typographic Conventions
Related Information
Additional HPjmeter Documents
Related Information
Publishing History
HP Encourages Your Comments
1. Introducing HPjmeter 3.1.00
Features
Concepts
JVM Agent
Node Agent
2. Completing Installation of HPjmeter
Platform Support and System Requirements
Agent Requirements
Console Requirements
Completing the installation
File Locations
Configuring your Application to Use the JVM Agent
Preparing to run Java
JVM Agent Options
Security Awareness
Securing Communication Between the HPjmeter Node Agent and the Console
Securing Communication Between the JVM and the HPjmeter Node Agent
3. Getting Started
Are You Monitoring an Application or Analyzing Collected Data?
Using HPjmeter to Monitor Applications
Configure and Start Your Application
Confirm that the Node Agent is Running
Start the Console
Connect to the Node Agent from the Console
Set Session Preferences
View Monitoring Metrics During Your Open Session
Using HPjmeter to Analyze Profiling Data
Using HPjmeter to Analyze Garbage Collection Data
Monitoring Demonstration Instructions
Memory Leak Application
Thread Deadlock Sample
4. Monitoring Applications
Controlling Data Collection and Display
Setting Data Collection Preferences
Managing Node Agents
Managing Node Agents On HP-UX
Node Agent Access Restrictions
Running Multiple Node Agents
Saving Monitoring Metrics Information
Saving Data from the Console
Naming Monitoring Data Files
Diagnosing Errors When Monitoring Running Applications
Identifying Unexpected CPU Usage by Method
Viewing the Application Load
Checking for Long Garbage Collection Pauses
Checking for Application Paging Problems
Identifying Excessive Calls to System.gc()
Reviewing the Percentage of Time Spent in Garbage Collection
Checking for Proper Heap Sizing
Confirming Java Memory Leaks
Determining the Severity of a Memory Leak
Identifying Excessive Object Allocation
Identifying the Site of Excessive Object Allocation
Identifying Abnormal Thread Termination
Identifying Multiple Short-lived Threads
Identifying Excessive Lock Contention
Identifying Deadlocked Threads
Identifying Excessive Thread Creation
Identifying Excessive Method Compilation
Identifying Too Many Classes Loaded
Using the JMX Viewer
Understanding the JMX Summary View
Understanding the JMX Server View
Using the Functions in the JMX Server View
5. Profiling Applications
Profiling Overview
Tracing
Sampling
Tuning Performance
Preparing a Benchmark
Collecting Profile Data
Profiling with -Xeprof
Profiling with Zero Preparation
Profiling with -agentlib:hprof
Naming Profile Data Files
–Xeprof and –agentlib:hprof Profiling Options and Their Corresponding Metrics
Approaches to Analyzing Performance Data
Looking at the Data from the Bottom Up
Looking at the Data from the Top Down
Looking for Inefficiencies in Memory Usage
Considerations in Interpreting the Data
Inclusive Versus Exclusive Time
Time Units
Finding Summary Information for Saved Data Sets
Adjusting Scope
Comparing Data Files
Scaling Comparison Data
Reading Profiling Histograms
Key to Thread States Reported by
Interpreting the Histogram Presentation
Using Call Graph Trees
Interpreting Call Graph Data
Options for Manipulating the Call Tree Display
Using Heuristics to Find Possible Hot Spots
6. Analyzing Garbage Collection Data
Obtaining Garbage Collection Data
Data Collection with -Xverbosegc
Data Collection with -Xloggc
Naming GC Data Files
–Xverbosegc and –Xloggc Options and Their Corresponding Metrics
Finding Summary Information for Saved Data Sets
Comparing Data Files
Basic Garbage Collection Concepts
Key to Garbage Collection Types Recognized by HPjmeter
Understanding the Summary Presentation of GC Data
Understanding the System Details Captured with GC Data
7. Using the Console
Starting the Console
Starting the Console On HP-UX
Starting the Console On Linux
Starting the Console On Microsoft Windows
Using the Main Window Functions
Data Representation
Icons and Their Meaning
Console Tool Bar Buttons
Console Menu Choices
Console Guide
Status Bar
Setting Monitoring Session Preferences
Specifying Metrics to Collect for Monitoring
Specifying Filters for Monitoring
Enabling Monitoring Alerts
Viewing Monitoring Data in HPjmeter
Using Alerts
Using the Alert Controller
Responding to Alerts
8. Using Visualizer Functions
Visualizer Behavior When Monitoring Behavior or Analyzing Data
Using Monitoring Displays
Monitor Code and/or CPU Activity Menu
Monitor Memory and/or Heap Activity Menu
Viewing Profiling or GC Data in HPjmeter
Using Profile Displays
Menu Choices
Profile Code and/or CPU Activity
Profile Memory and/or Heap Activity
Profile by Threads
Profile by Locks
Using Heuristic Metrics from the Estimate Menu
Using Specialized Garbage Collection Displays
Heap Usage After GC
Duration (Stop the World)
Cumulative Allocation
Creation Rate
User-Defined X-Y Axes
Using Visualizer Tool bars
Common Tool Bar Buttons
Tool Bar Buttons for Manipulating Tabular Data
Tool Bar Buttons for Manipulating Graphical Data
Button Function Details
Change Color Selection for Histogram Display
9. Understanding How HPjmeter Works
Performance Overhead on Running Applications
Application Server Startup Time
Monitoring Overhead
Profiling Overhead and Intrusion
Node Agent Overhead
Console Overhead
Data Sampling Considerations
How Memory Leak Detection Works
Tapping in to Standard Management of the Java Virtual Machine
10. Troubleshooting
Documentation and Support
Identifying Version Numbers
Installation
Console
JVM agent
Node agent
Zero Preparation Profiling
Glossary

List of Figures

3-1. Heap Display Showing Possible Memory Leak Behavior
3-2. Thread Deadlock Example Display
4-1. Example Metric: Percentage of Time Spent in Garbage Collection When Application Behavior is Normal
4-2. Example Metric: Percentage of Time Spent in Garbage Collection When Application Shows Potential Memory Leak
4-3. Example Metric: Method Compilation Count
4-4. Main Console Showing a JMX Server Node in an Open Session
4-5. Appearance of JMX Viewer When First Opened
4-6. JMX Viewer with Summary Memory Tab Selected
4-7. JMX Viewer with Summary Threads Tab Open
4-8. Default View When JMX Viewer is First Toggled to the JMX Server View from Summary View
4-9. Mbean Attribute Tab Open for Display
4-10. Mbean Operations Tab Open for Display
4-11. Mbean Notifications Tab Open for Display
4-12. Mbean Information Tab Open for Display
5-1. Pie Chart Showing Percent Time Spent in Various States for a Given Thread
5-2. Multiple Nodes Exposed in Call Graph Tree Display Showing Visitation Color Coding
6-1. Summary Panel Showing Garbage Collection Statistics
6-2. Summary Panel Showing System Details for a Period of Xverbosegc Data Collection
7-1. The Main Console Window
7-2. Main Pane with Several File Types Loaded and an Open Session
7-3. Console Guide Location and First Screen
7-4. Metric Preferences Window
7-5. Enable or Disable Alerts Window
7-6. Appearance of Alert Notices in the Main Console Pane
7-7. Alert Controller Window
7-8. Example Alert Log
7-9. Abnormal Thread Termination Alert Visualizer
7-10. Memory Leak Locations Visualizer
8-1. The Profiling Data Viewer
8-2. The Garbage Collection Data Viewer
8-3. Monitoring Metric: Java Methods Hotspots with Confidence Interval Graphically Displayed for Each Method
8-4. Monitoring Metric: Thrown Exceptions with Stack Traces
8-5. Monitoring Metric: Heap Monitor
8-6. Monitoring Metric: Garbage Collection
8-7. Monitoring Metric: Percentage of Time Spent in Garbage Collection
8-8. Monitoring Metric: Allocated Object Statistics by Class
8-9. Monitoring Metric: Allocating Method Statistics
8-10. Monitoring Metric: Current Live Heap Objects
8-11. Copying Current Live Heap Objects Data into Buffer
8-12. Monitoring Metric: Thread Histogram
8-13. Monitoring Metric: Lock Contention
8-14. Monitoring Metric: Method Compilation Count
8-15. Monitoring Metric: Loaded Classes
8-16. Percent CPU Utilization for System and Processes
8-17. Threads Histogram with Pie Chart
8-18. Threads Groups Histogram
8-19. GC Metric: Heap Usage After GC
8-20. GC Metric: Duration
8-21. GC Metric: Cumulative Allocation
8-22. GC Metric: Creation Rate
8-23. User-Defined Comparisons of GC Metrics
8-24. Finding an Item
8-25. Using the Pause Clock
8-26. The View Menu Selections in the GC Viewer
8-27. Specialized GC Graph with Area Selected for Finer Resolution
8-28. New Resolution After Selection
8-29. Resolution After Interval Applied to All Metrics
8-30. Using the Color Changer on Histogram Displays
9-1. Early Indicator of Possible Memory Leak Using Garbage Collections Visualizer
9-2. Early Indicator of Possible Memory Leak Using Heap Monitor Display