I was sitting with the same problem just now and got it to work. I added com.jprofiler.agent. to the bootdelegation parameter. Before I had a problem where it gave the same fault without starting the application because the path specified to the agent.jar was incorrect. (If I remember this correctly). Recently, I investigated performance issues of GlassFish 3. I found that JProfiler 6 is a very handy tool. In this blog, I would like to share with you what I learnt. I would like to thank Dhiru Pandey and Suveen Nadipalli for their help. The ant tasks bundled with JProfiler allow you to perform all command line operations from your build script. Broadest support for platforms, IDEs and application servers JProfiler integrates into your environment: We provide native agent libraries for a wide range of platforms, both for 32-bit and 64-bit JVMs. Integrations into all popular. JProfiler is a top choice for many developers. With an intuitive UI, JProfiler provides interfaces for viewing system performance, memory usage, potential memory leaks, and thread profiling. With this information, we can easily know what we need to optimize, eliminate, or change – in the underlying system. Most methods of the com.jprofiler.api.agent.Controller are reflected in the MBean. For documentation of the MBean operations, please see the javadoc of com.jprofiler.api.agent.mbean.RemoteControllerMBean. The MBean may also be accessible via configuration facilities of an application server or other tools. Command line controller.
Identify and resolve performance bottlenecks, memory leaks, and threading issues
This tutorial aims to enable you to identify and resolve problematic patterns in memory and CPU usage in Java and Scala codeusing JProfiler and JVisualVM.
One survey published 2015-11 as pdf presented these market share numbers:
Comparison for Mac (named license with two years of support):
| Product | Date | File Name | MB | $USD |
|---|---|---|---|---|
| JProfiler | 2017-01-21 | jprofiler_macos_10_0.dmg | 148 MB | $698 |
| JProfiler | 2016-06-21 | jprofiler_macos_9_2.dmg | 126 MB | $698 |
| JVisualVM | 2016 | GitHub 1.3.9 | 13 MB | free |
| Yourkit | 2016.02 | yjp-2016.02-b43-mac | 8.7 MB | $649 |
| jClarity Censum | - | - | - MB | $? |
VisualVM has the largest market share because perhaps it is free and is bundled in the JDK since JDK 6 update 7.
Netspot pro – wi fi reporter 2 12 1006. http://docs.oracle.com/javase/7/docs/technotes/guides/visualvm/profiler.html
The bleeding-edge version at
https://visualvm.github.io/download.html
is actively maintained by two developers in Prague, the Czech Republic.
VIDEO:
Philip Starritt has created videos on VisualVM:
Launcher Setup in Eclipse. 9 July 2017.
https://visualvm.github.io/idesupport.html
Download from
https://www.ej-technologies.com/download/jprofiler/files
for your platform.
PROTIP: While you wait for the download,identify the version of IDE you’ll be using with JProfiler.Most developers use integrations with their IDE IntelliJ IDEA, Eclipse, NetBeans, Oracle JDeveloper.
Also, get a license at
https://www.ej-technologies.com/buy/jprofiler/select
$698 with a year of support.
Open the JProfiler installer.
Click Next to Evaluate for 10 days.
Optionally: Click “[Select an IDE]” if you have one and click Integrate.
See http://resources.ej-technologies.com/jprofiler/help/doc/ide/$folder$.html
An example of IDE configuration is http://www.andrejkoelewijn.com/blog/
Click Next, Finish.
JProfiler is started up automatically.
Just to walk through JProfiler’s UI, let’s look at a program provided by JProfiler to behave badly.
Click to select the “Animated Bezier Curve demo” session whichJProfile provides to intentionally leak memory not garbage collected:Its code contains a “LeakMap” object.
If an Evaluation version dialog appears, click “Evaluate”.
The Session Starup settings dialog appears.
Click the Help button for context-sensitive help.
PROTIP: This is the best way to access specific documentation.So if you want to review documentation on another process, open the 303 page pdf JProfiler Manual at
http://resources.ej-technologies.com/jprofiler/help/doc/help.pdf.It presents same content asOnline Help.
To continue working, click on the app dialog partially hidden by the Help dialog.
Among videos created by Ingo Kegel (CTO of the company) isthis from 2012 for an older version of the program.
TODO: Recreate video using new verion of JProfiler, and run Scala.
A terminal window is opened for the demo process and the main window of JProfiler displays profiling metrics.
PROTIP: Probes collect measurements.
Click OK to accept the Startup Settings.
A run is begun automatically.
PROTIP: In the Terminal window opened automatically, notice “JVMTI version 1.1 detected”refers to the technology the JVM provides to enable JProfiler to obtain instrumentation data.
Click on Session Settings at the top menu:
Notice we are launching a new JVM instance and using the JVM indicated referencing the relative CLASSPATH indicated.
Alternately, blog entry How to monitor Kafka apps with JProfilershows this setting screen for attaching a running program:
The app is started with this command
It’s “jpenable” which loads the profiling agent and makes it possible to connect with a remotesession from another computer.
PROTIP: The profiling agent and JProfiler GUI communicatewith each other through a socket.By default, the profiling agent listens on port 8849.Many networks block traffic from such a port.
This video shows how to setup a SSH Tunnel.
Click OK to dismiss the dialog.
Click on Telemetries category Overview.
Among processes, click on the Demo to expose the app under test.
Check “Leak Memory” on the BezierAnim app window.
Programs that leak memory will show an upward trend in thread memory usage.
PROTIP: Many memory leaks accumulate gradually over time, so may require a long run to identify conclusively.
Click the zoom in and out icons at the lower right corner.
Each GC Activity spike reduces the amount of Memory used (shown in blue)as a portion of memory allocated (shown as the top of the green block).
Click on Live memory category All Objects view to sort objects by the amount each uses memory.
Anatomy & physiology 3 0 17. PROTIP: Most items are generic objects such as “java.lang.Long” which uses a lot of memory because many objects use it.We want to see the objects creating additional memory usage over time.
Click the Mark Current button at the right of the top ribbonto set the baseline for differences to be displayed.
Righ-Click on the high-level object defined by a custom name (“java.awt.geom.GeneralPath”)to select “Show selection in Heap Walker”.
“Take Heap Snapshot for Selection”. Secret admirer game.
Click OK to the Heap Snapshot Options with “Select recorded objects”.
Click “References” to activate the reference graph view.
https://nisberssusuff1970.mystrikingly.com/blog/tunnelblick-mac-3-8-1. Click the gray arrows to expand items at each level.
Right-click on object to select “Show paths to GC Root”.
Click OK to see Single Root.
Scroll horizontally to the left in the chain.
Click on “Biggest Objects” icon.
Mr money maker. Expand the tree by clicking gray arrows under the app “bezier.BezierAdmin”
Check the “Classes” radio button, then OK.
BLAH: Where is this in v9.2?
Check the “Allocations” radio button.
QUESTION: How do we know leakMap is within this class?
Right-click to select “Show Source”.
PROTIP: Snapshots can be taken only while the program is running.
Click the Take Snapshot camera icon on the ribbon.
Alternately,
click the HPROF heap snapshot.
Click Save Snapshot.
Use the integration wizard to activate this by appending to the -agentpath VM parameter
Memory leaks was a small part of all issues according to this report in 2015
Although Chrome announced it is doing away with Extensions,JProfiler Origin Tracker Chrome Browser Extensioncan still be useful.
JProfiler has several “modes” it can run.
PROTIP: Take a “top-down” approach to analyzing a Java program.
Ideally, you can attach JProfiler to a running server.
It can be time consuming to create load scripts that provide the coverage of code needed.So it is often useful to see running production servers. Free quick hits slot games.
Begin using JProfiler by using the “Profile at startup” mode.
Understand a programs’s major dependencies.
Identify the biggest objects.
Identify the rate of memory use.
Instrument classes by having JProfiler retransform the program.
Run JProfile in offline mode to save snapshotswhen you need to analyze several JVMs running at the same time.Then have an Ant program task to compare the snapshots.
The difference run-time data areas are illustrated here:From Java8 virtual machine architecture by Ranjith ramachandran
NOTE: In Java8, metaspace setting takes the place of the MaxPermSize parameter that specifies space of the method area holding classes.
To manage the “thrashing” of PC (Program Counters) pointing to the next instruction to be executed in each thread,
use CPU profiling.
To manage the Java Stacks containing stack frames for each chain of methods in each thread “Stack Overflow” errors refer to this area,
use Thread Profiling.
Native Method Stacks per thread Football manager 2016 crack mac game free download.
To manage the Heap holding objects instantiated for use in JVM (garbage collected),
use the Heap Walker.
http://www.javamonamour.org/2014/01/how-to-demo-garbage-collection-jconsole.htmldiscussed inhttps://www.youtube.com/watch?v=Bjv_9pKiALQ
The company behind JProfile, ej-technologies, is based in Munich, Germany.
There has been no activity on the @JProfiler Twitter account.
There is no JProfiler group on LinkedIn, Facebook, etc.
Java Mission Controlmonitors the JVM in real-time.
Java Mission Control requires a commercial license for use in production.
JMC has an Experimental Plug-in for Eclipse.
PROTIP: JMC comes bundled with the HotSpot JVM since Oracle JDK 7 Update 40 (7u40). So in a Terminal:
Use the abbreviation for Java Mission Control to load it:
jmc
A welcome screen titled “Mission Control 5.5” appears.
Optional: Click the “A” at the upper-right corner to change font size.
Click the program icon
A JMX console appears.
Open another terminal window to bring up the app under observation:
NOTE: Although Oracle has built in the recording engine into the JVM run-time, it needs to be enabled in JVM start-up switches.
https://docs.oracle.com/javacomponents/index.html
Oracle also provides optional tools for heap dump analysis and DTrace recording.
Java SE Suite provides Deterministic GC.
YourKitfrom Germanyhas profilers for both JVM and .NET.
Download from https://www.yourkit.com/java/profiler/download/
In https://www.yourkit.com/purchase/license is $649 with a year of support.
Censum from JClarity.com (by Martijn Verburg based in London) is available as both a local VM log reader (for $749/year) and as a SaaS web app.
https://blog.codecentric.de/en/2017/09/jvm-fire-using-flame-graphs-analyse-performance/
CTO/CEO Martijn Verburg (@karianna) speaks at VIDEO: The Diabolical Developer’s Guide to Performance Tuning introduces the Performance Diagnostic Methodology (PDM).
Takipi is focused on Scala performance tuning.It is the only tool I know of that shows numbers associated with Scala code.It’s free up to 2 servers for Scala.
https://shipilev.net/blog/2016/close-encounters-of-jmm-kind/
As a comparison, take a look at theprofiler in Visual Studio for C# Xamarin code.
This article is one of a series about tuning and performance:
Please enable JavaScript to view the comments powered by Disqus.
0 
Star