FusionReactor Java Performance Monitor: Blog

FusionReactor Lucee and Railo line performance


This technote is going to introduce the Lucee and Railo line performance plugins. The FusionReactor plugins allow you to profile the execution of ColdFusion CFML code at line level. This data can then be used to identify performance issues deep inside your ColdFusion pages and components and can be an invaluable tool for finding problems within your applications. This feature also gathers information about the CFML code coverage which can be very valuable when testing applications.

If you are using a ColdFusion server, FusionReactor 6.04 or above supports the FusionReactor ColdFusion Plugin. More information about the FusionReactor ColdFusion line performance, check out the link below.

Getting Started

If you are using FusionReactor 6.2.0 or above and a Lucee 4.5 server, you will be able to use the FusionReactor Lucee Plugin. However, if you are on Railo server then you will be able to use the FusionReactor Railo Plugin.

Currently Lucee 5 is not supported.

In order to view any of the profiled data, you will require the “CF Line Performance Explorer” application. This can be downloaded from the link below.

When the tool has been downloaded, you will need to unzip the folder and copy the contents into your Lucee or Railo /webapps/ROOT directory. Going to the following address, http://localhost:8888/cfperformanceexplorer-master/ you will see the following when you attempt to view a files metric data.

To enable the line tracking for your CFML files you can follow the steps outlined below;

  1. Access your FusionReactor Instance .
  2. Navigate to FusionReactor > Plugins > Active Plugins
  3. Locate the FusionReactor Lucce Plugin or the FusionReactor Railo Plugin and then press the Configuration button.
  4. Change the value of the “Track CFML Line Execution Times” field to “Enabled” and Save the changes.

This will take immediate effect and any CFML code that is run is going to be profiled. You can now return to the CF Line Performance Explorer application to view the profile data for any classes that have been run since enabling of the plugin. See screen below

Though the data gained from the profiled classes may be invaluable the profiler can have a performance impact on your server. It is recommended to only use the profiler when required and to take precautions when using it in a production environment.

More Information

For more information you can view the following documentation.

Issue Details

Type: Technote
Issue Number: FRS-400
Components: Plugins + OSGi
Resolution: Fixed
Added: 11/08/2016 15:06:20
Affects Version: 6.2.0
Fixed Version: 6.2.0
Related Issues: None

Win a Ticket for Velocity Conference New York, 2016


For the second time we are sponsoring Velocity Conference, New York. You can visit us at booth #19, we will be showing off the latest version of FusionReactor and FusionCLOUD. To celebrate this we are giving away a free ticket for Velocity Conference, New York.

The Prize is for one Bronze 2-Day Pass which Includes:
– All sessions (Wed & Thu)
– All keynote and plenary presentations
– Sponsor Pavilion and all events held there
– All on-site networking events
– Lunch (Wed & Thu)

There are Two ways to enter the draw:
1) ON TWITTER : Retweet this tweet and follow us it is that simple! If you are already following us then just retweet this.

OR (You can do both to double your chances of winning).

2) ON FACEBOOK : Just Like us on Facebook –  and post us a Personal Message – “I want to go to Velocity New York”
We will be announcing the winner on,  Friday 26th August, this will give the winner enough time to organise flights and accommodation.

If you do not win, please do not worry you can still save 25% on the entry price by using our Discount Code: FusionReactor25


Announcing FusionReactor 6.2

We’re happy to announce the latest release of FusionReactor – 6.2.   This release contains around a dozen cool new features and improvements.   You can see a list of all the new stuff on the Release Notes page or simply just go and download it here.

One of the most interesting new features is the Applications View.   Users who are familiar with FR6 will have already taken note of the new capability to filter requests and transactions on Application and lower level categories, which we call “flavors” and “subflavors” – the bottom line is that for Web Requests, we may have Web as the flavor of the request and then subflavors would be the HTTP methods of the Web Request, such as – GET, POST etc.

Why is the useful ?   Well the Applications View can now give you a great visual breakdown of how much each of those requests are effecting your application – in terms of processing time and hit counts.   You can see this from the image below.

Applications View

Using the time filter, you can easily take snapshots of time to see how your applications are being utilized. This is great for identifying potential performance bottlenecks. This view also provides some interesting details, showing breakdowns of memory used, duration (compared with average duration), hits and errors generated via that call – plus the amount of CPU used (in ms).

Application Detail View

Production Java Profiler Extensions

FusionReactor 6 Ultimate Edition now includes a Production Profiler for Java, which is designed to help you identify bottlenecks in your production environment. The Production Profiler is VERY low overhead, so you gain maximum benefit, without impacting your applications.

A new feature in the profiler is to enable On-Demand decompiles as well as integrated Debug Triggers to be set directly from the Profile Page.   This is another example of how easy it is to get to the root of your issues using FusionReactor.   Links to the Decompiler and Debugger are highlighted in RED and GREEN respectively.

Java Profiler

Last, but not least… FusionCLOUD

One of the most significant things is that 6.2 is actually our official FusionReactor agent release for FusionCLOUD.

Most of you will be saying – FusionCLOUD – what’s that…?   Well, we’ve been running FusionCLOUD as an invite only beta for around 12 months now.   FusionCLOUD is our exciting new service which extends the on-premise version of FusionReactor to add a broad range of extended functionality available via the cloud.

So what will FusionCLOUD have to offer…?

  • Many of the features you’re already familiar with in FusionReactor, such as Running Request, Stacktraces, Web Metrics view, Resources View
  • CLOUD Dashboard – similar to Enterprise Dashboard but very configurable, with extended views and sophisticated threshold setting
  • Secure Bi-directional channel (SOCKET) – ability to send requests down to your server from FusionCLOUD e.g. launch a Stack Trace / Garbage Collection / Execute script
  • Application view – the app view provides FR users with the insight into how your actual application is performing – not just web requests or transactions as we have in FusionReactor.
  • Alerting Engine – with full integration to alert with emails, PageDuty, HipChat, Email, Slack, OpsGenie , VictorOps, FLOWDOCK, Twilio, IRCCAT etc.

FusionCLOUD Request Throuput
If you are interested in getting some more information on FusionCLOUD or would like to jump onto the FusionCLOUD Early Bird program – please contact sales

FusionReactor features in the DZone Performance & Monitoring Guide

FusionReactor features in the DZone Performance & Monitoring GuideDZone have just published the 2016 Performance & Monitoring Guide and FusionReactor are featured in it. According to DZone’s research, it states that the #1 tool for finding production issues is APPLICATION LOGS (90% of respondents) – which we think is pretty SAD – because delving through logs is painstaking, time consuming and generally not very much fun.

So why are traditional APM tools not solving this issue?

Well, your typical APM tools provide some neat metric graphs and can alert you when something seems wrong, but they don’t tell you much at the level of detail software engineers need to get to the actual root of the issue. So you end up having to grep through logs, dive into the heap, tally your object instances, run stack trace over and over, guess some breakpoints or include debug data into our code (WOW – things are REALLY BAD).

When something breaks in production, developers must go deeper than resource usage or business transaction fail rates – they need real-time insight and transparency into what the application is actually doing at the point that it’s breaking – in production.

In order to pinpoint issues in production we believe developers need additional tooling which is actually closer to what they would use in their development/test environments. Developers need to see things like:

  • stack trace and local variable visibility, at the exact point of failure or deadlock
  • profiling information, when code is run against ‘real production data’ – so that performance bottlenecks can be identified
  • transactions, web and JDBC requests not just measured by time, but also by the amount of memory consumed
  • class loads/unloads & memory allocation (heap + non-heap) across time

FusionReactor Ultimate Edition is designed to give the level of detail software engineers need to get to the actual root of the issue and provides low-overhead production-grade tools to give access to detailed information needed to “deep-dive” & quickly figure out the hard stuff developers need to fix. FusionReactor doesn’t “just monitor” and put the burden on you to figure things out. FusionReactor puts you in control, so that you can instantly isolate production issues and performance bottlenecks with our integrated low overhead Production Debugger and Java Profiler. Plus, it will pro-actively improve application resilience with our unique Crash Protection capability.

No other monitoring solution gives you the same level of depth, insight or control of your Java applications ‘in production’.

If you’re not using Fusion Ultimate Edition already, please contact sales and we would be happy to provide you with an Ultimate Trial license – or if you’re new to FusionReactor, just download our 14 day Free Trial

Introducing FusionReactor’s Production Java Profiler

If you’re trying to root out application performance bottlenecks on your production JVM environment – then you are faced with some significant challenges.

Knowing where and what to tune up within your applications can be a major headache. APM tools can help and generally they provide metrics which will highlight slow running queries or poorly performing requests. However, what if you’re looking for performance issues within your actual code – you know it’s performing poorly – but you want to understand exactly how slow and then figure out why!

For performance issues, (unless you’re already using FusionReactor!) you may think of using a profiler, such as JProfiler or jvisualvm. However, it’s not easy to attach such tools to a specific process (especially in production) and it’s common knowledge that such tools impose a heavy performance burden themselves which essentially will render them useless in a production environment.

We now have an alternative – FusionReactor’s Production Java Profiler.

FusionReactor 6 Ultimate Edition now includes a Production Profiler for Java, which is designed to help you identify bottlenecks in your production environment. The Production Profiler is VERY low overhead, so you gain maximum benefit, without impacting your applications. The profiler may be run on demand, but is switched on by default, so that it will automatically profile your application as soon as it detects a long running request or transaction. You can also limit the number of profile samples which are taken, which will enable you to control the level of accuracy of the sample. Our tests have shown that even with limited samples, the insight you gain into performance bottlenecks is invaluable.

What can you profile?

Any requests or transactions which are running on the JVM – e.g. Tomcat, JBoss, WildFly, Glassfish, Jetty etc. ColdFusion applications can also be profiled– as well as any other applications which are currently being monitored by FusionReactor 6.1 or higher.

What do you have to do to start profiling?

Install FusionReactor 6.1 or above – activate it using either a TRIAL license, or your own FR Ultimate license – and that’s it. The Production Profiler is automatically configured to immediately profile any request or transaction which runs longer than 3 seconds. The default profiling sample is 200ms.

You can also prProfiler Iconsofile individual requests by simply clicking on the Profile now button – indicated by the Clock icon – which you can see next to any running request.

As requests are profiled, they will be listed in the Profiled requests or transactions screen – as in the example below.

Profiled Transactions WebRequest

Clicking on the Profiler link, will take you to the Profiler details page – which shows a breakdown– represented in time and percent of how long was spent in specific sections/areas of your application code. The profile taken is basically an inverted view of the call stack.


Bottlenecks are generally easy to spot. In our opinion, optimizing every part of your code is not worth the effort. Efforts should be focused on code segments where returns are higher, or rather highest.

Features and Benefits

  • When FusionReactor Ultimate is running, then profiling will start automatically for any request/transaction which runs for longer than 3 seconds. Note that this threshold can be easily altered to suit your needs.
  • Profiling can also be started on demand.
  • Find the root cause of performance bottlenecks in your application by viewing the profiled call stack in a top to bottom view.
  • Performance is shown in terms of time spent within that method – shown in seconds. The time will also be shown as a percentage.
  • Profile anything that runs on the JVM – without having to make any Java command line changes or restarting any processes – everything is built into FusionReactor Ultimate Edition.

If you would like to evaluate FusionReactor Ultimate – please download a trial license here

Transaction Memory Values Explained

One of the metrics gathered by FusionReactor during the execution of a transaction (request) is the memory usage of the transaction. This is displayed on the Main tab in the transaction details page. Since FusionReactor 6 we have added the Transaction Allocated Memory value to these details. All of these numbers can be a little confusing so below we have explained what all the memory values mean.

Explaining FusionReactor Transaction/Request Memory Values

The first few numbers are quite straight forward. These are simply a snap shot of the JVM state at either the start of the transaction (for transactions that are still running), or at the end of the transaction (for transactions that are finished).

Used Memory

This is the amount of memory that is currently used by the JVM, shown as both a absolute byte value and as a percentage of the maximum memory.

Max Memory

This is the maximum amount of memory that the JVM is allowed to use. This can be defined using the -Xmx Java argument.

Total Free Memory

This is the actual amount of memory that is not used by the JVM, this includes memory that has been allocated but not used yet. i.e. this is max memory minus used memory.

Allocated Memory

This is the current amount of memory that has been allocated by the JVM.

Free Memory

This is the amount of memory that has not been allocated by JVM. i.e. max memory minus allocated memory.

Transaction Allocated Memory

This value needs some deeper explanation in order to avoid confusion. This number is the total number of bytes that have been allocated during the life time of the transaction. Every time an object is created a portion of the JVM memory is used to hold this object, of course in java the garbage collector (GC) will automatically free any memory that is no longer needed.

This means that you can the reuse the same memory space again. So if we run the bit of code below, we will allocate memory space the string 10 times. Resulting in the transaction allocated memory value being 10 times the size of the single string.

for(int i = 0; i < 10; i++)

String str = “this is a string”;


This would mean that even if you have a max heap of 8 gigabyte the transaction allocated memory value can exceed this value. This would indicate that JVM is allocating and then freeing lots of object. If we look at the image below you can see that a single transaction can allocate more than the maximum heap, as long as it does not do it all in one go.

Transaction Memory Vales 2

2015 Wrap-Up – hello FR6 and Happy Birthday FusionReactor !

What a year 2015 has been – I just wanted to share some of the highlights we’ve achieved :

1. We launched FusionReactor 6 – with loads of new features – some significant performance improvements as well as the new ULTIMATE Edition with the Production Debugger
2. We applied for our first ever patent – which was actually for the Production Debugger
3. Sold our 25,000’th FusionReactor license
4. FusionReactor was 10 YEARS OLD in December 2015
5. Rolled out FusionReactor CLOUD Beta – which is currently hosting over 1000 server instances !
6. Sponsored a number of events, including dev.Objective(); Into The Box in Minneapolis, CFCAMP in Munich, Germany, Velocity in New York & the Adobe ColdFusion Summit in Las Vegas
7. Launched the new FusionReactor website – https://www.fusion-reactor.com
8. Introduced a FusionReactor Developer Edition (will post a separate article on this)
9. Launched FeeFo independent review service for FR – see Customer Reviews for the current score https://www.fusion-reactor.com/customer-reviews/
10. Look out 2016 – with the planned launch of FusionReactor CLOUD + lots of new goodies planned for FusionReactor – it’s going to be VERY BUSY

Finally, as the end of the year rapidly approaches I would like to take this opportunity to wish you all the very best for the holiday season and good health, happiness and success for 2016.

Best Wishes,

David Tattersall

CEO Intergral – makers of FusionReactor Application Performance Monitor

Announcing FusionReactor 6 – the wait is over !

After approximately 10 years of engineering, 100 meetings, 1,000 pizzas and 10,000 cups of coffee we’re now ready with FusionReactor 6 – it’s taken a while – but it’s worth it and FR6 is by far the best, fastest and most feature rich version of FusionReactor ever launched. Oh – and as everything seems to be the power of 10 – FusionReactor is also exactly 10 years old this month 🙂

What’s different…? Well, FR6 includes tons of new features and improvements, but one feature really stands out – which is the Production Debugger available in the new ULTIMATE Edition of FusionReactor. We’ve always believed that monitoring is really a means to an end. The end goal is about your company being able to deliver your service, such that your customers are satisfied and your business makes money. So your applications need to be free of defects and always ON. Unfortunately, all software has defects, but we believe that the measure of a great monitor, is the speed at which the monitor can highlight and direct you to the defect, so that you can actually get it fixed and restore service.

FusionReactor has always been about giving you accurate, real-time insight into what’s happening on your server/application right now and the Production Debugger available in the ULTIMATE Edition takes that goal to a whole new level.

How to get FusionReactor Ultimate Edition

FusionReactor ULTIMATE can be purchased separately and it’s also possible to upgrade from either Standard or Enterprise Editions. Please contact sales for more details.

Here are some of the highlights which FR6 has to offer:

  • Memory Usage metrics
  • Application Filter view
  • Application Session Tracking
  • Enhanced Garbage Collection Analysis
  • SQL Query Planner (Explain)
  • ColdFusion Extended Metrics visualized
  • On the fly code de-compilation
  • Improved Notification Center
  • Improved Java Frameworks – Spring, Struts
  • Support for Fusion SaaS (CLOUD) – note Fusion SaaS will be released separately to FR6

The whole team is very proud of what we’ve achieved with FusionReactor 6 and we very much hope that you enjoy using it and that it continues to be your first choice tool to monitor, detect issues and protect your applications and servers.

David Tattersall
CEO Intergral – makers of FusionReactor, FusionAnalytics and FusionDebug

FusionReactor 6 sneak peek – Re-writing the definition of what Application Performance Monitoring is all about!

APM tools have emerged as a category to help businesses address issues when applications break or systems are slow. Unfortunately, even though many of those tools measure metrics and provide some insight into what’s going on, they don’t do anything to minimize downtime and really accelerate time to fix. To be honest, traditional APM tools simply don’t do enough.
FusionReactor 6 takes a different approach – we not only provide the basics and core APM expectations that every user has for server monitoring, FusionReactor 6 introduces the unique and patented capability that allows you to do real-time Production Debugging, a game changer in accelerating the time needed to IDENTIFY and FIX issues – PLUS FR’s unique Crash Protection, which will alert you and guard your servers against crashes, so you can take action BEFORE systems go down – resulting in high application and server resilience, improved quality, less downtime and happier customers !
FusionReactor 6 is breaking the mold of traditional APM tools and will enable you keep your production systems online longer and with better results.

Here are some of the highlights which you can you expect with FR6:

  • Production Debugging / Alerting
  • Enhanced Crash Protection / Scripting
  • System Monitor – extensive metrics
  • Daily + Service Level Reports + weekly, monthly summaries
  • Enhanced Stack Trace Analysis (Trace Assist)
  • Memory Usage metrics
  • Application Filter view
  • Application Session Tracking
  • Enhanced Garbage Collection Analysis
  • SQL Query Planner (Explain)
  • ColdFusion Extended Metrics visualized
  • On the fly code de-compilation
  • Improved Notification Center
  • Improved Support for Java Frameworks
  • Support for Fusion SaaS (CLOUD) – note Fusion SaaS will be released separately to FR6

Production Debugging/Alerting

Did you ever hear someone say, “We can’t reproduce that problem, it ONLY ever happens in production” – well, with the introduction of FR6’s new Production Debugging (PD) capability, this will become a thing of the past.
Production Debug gives you all the control you need to simply and securely interact with your production environment as issues unfold. The insight it provides will revolutionize how you identify problems.   Unlike a typical debugger, you can setup conditional breakpoints and be alerted by email when they fire.   The email will contain a link to the debug session, as well as stack trace and variable details at the instant the break point fired.   It has NEVER been easier and faster to get to the root of issues.

Production Debug

The Production Debug feature will only be available in the new FusionReactor Ultimate Edition.

Key features include:

  • Interactive debugger within FusionReactor’s interface
  • Conditional breakpoint (BP) and break on exception handling – allowing full control of debug sessions in your production environment
  • Usual debug features e.g. alter variable, step into, out etc.
  • Email breakpoint notification – when a breakpoint fires, FusionReactor will hold the thread and send you a link to the debugger at that point. Restricting this to a single thread ensures that your production environment is not impacted by the Production Debugger
  • Time controlled handling mechanism, allowing you to easily control how your production system handles break points / exceptions / debug sessions
  • Exception Alert Email – including Stack trace + Stack context – will enable rapid identification of issues
  • Visual indication (in the FR banner) that a Production Debug trigger has occurred
    Bug Notification

System Monitor

Over the years, customers have often asked for other system related metrics which were usually only available in more traditional system monitoring tools. We have now extended FR6 to include a wide range of new metrics and system specific information. Access to this information is via the System Resources icon in the main FusionReactor interface.

The new metrics being tracked, include:

  • System Environment details
  • Java Environment details
  • Currently logged in users
  • Network Details
  • Memory Swap Information
  • System Console Access
  • Running processes page; showing:
    • CPU usage
    • Memory usage
    • File descriptors
    • Threads
  • Process details page; showing:
    • Memory details
    • Environment variables
    • Modules
    • Process arguments
  • Disk IO / Per disk
  • Network IO / Per network adaptor
  • Disk Usage & capacity – broken down per disk
  • CPU usage per core
  • CPU usage break down (nice/wait/system/user)

System Metrics

Another important feature is the ability to set disk space thresholds, so now FusionReactor can alert you when disk space reaches a defined limit.

New FusionReactor Reports

Daily Reports

Feedback to the original FR Daily Report was really positive and we wanted to build on that with our new Daily Report, which adds additional information and draws your attention to potential issues and/or improvements in performance and stability. The new layout includes both previous values, and targets for those values. We think that this will allow for a better overview of how your server is doing on a day to day basis.

We have also added some more statistics to the report including number of sessions and number of 404 errors. In addition to these metrics we have added a breakdown of the recorded outage, with estimated start and end dates and times, durations and the reason for the outage. We also now have a breakdown of all response codes for the reported period, with average runtime, count and its percentage out of all requests.

Along with the Service Level report, we are introducing a Weekly report, which will produce a summary of your server for the week, as well as a monthly report, which will produce a summary of the calendar month.

ColdFusion Metrics Page

FR5 already collected a number of specific ColdFusion metrics. Till now, these were stored in various log files and were only available visually via FusionAnalytics. FR6 has 2 new screens available which break down the CF metrics and display them in graphical form. Some of the metrics shown, include : Active Sessions, # of current sessions, Template Requests, Web Service requests, App Scope Size, hit counts (breakdown of hits per request type) etc.

ColdFusion Metrics

SQL – Query Plan (Explain)

Since SQL is declarative language, there are typically a large number of alternative ways to execute a given query. These alternatives can provide widely varying performance. JDBC is typically one of the main areas which we find at the root of application related performance issues.

FusionReactor 6 has the capability to attach an SQL Query Plan to the given JDBC transaction in the event that the SQL statement execution is longer than a given time. This is made available on the transaction details page. This feature will provide database users and administrators the capability to manually examine the plans produced by the optimizer to spot potential performance issues. FusionReactor will run the query plan immediately after the actual query is executed.

FusionReactor 6 Query Plan

Session Tracking and Visualization per Application

In the stateless HTTP web world, Session’s play an important role for maintaining client state. Sessions are generally used to store user data – which can quickly eat up memory if not kept in check. Sessions are tracked (and identified) using a session ID. FR6 is now tracking and visualizing sessions. All created, destroyed and active sessions are tracked per application.

Session Planning

Northern Virginia ColdFusion Users Group FusionReactor Product Suite Presentation (Recorded November 2014)

Using FusionReactor, FusionAnalytics, and FusionDebug to Solve CF Server and Coding Challenges (Recorded November 2014)

Using FusionReactor, FusionAnalytics, and FusionDebug to Solve CF Server and Coding Challenges Presented to the Northern Virginia ColdFusion Users Group, Presented by Charlie Arehart (Recorded November, 2014)

In this 90 minute talk, veteran CFer Charlie Arehart will introduce and demonstrate the “Fusion tools”, FusionReactor (FR), FusionAnalytics (FA), and FusionDebug (FD). If you’re not familiar with the tools, or are not aware of how they have evolved, you’ll come to appreciate how they can quickly and easily help you solve server or coding challenges.

About the Northern Virginia ColdFusion Users Group

Northern Virginia ColdFusion Users Group meets (at a minimum) once per month.

Their aim is to provide opportunities for ColdFusion and Actionscript developers to meet and network with one another as well as opportunities to engage in presentations and learning to help sharpen your ColdFusion development skills.

They are an active group and always welcome new members. If you live or work (or can otherwise get to) Fairfax, VA then they would love to have you come out.

Relevant Links

Charlie Arehart: http://www.carehart.org/
Northern Virginia ColdFusion Users Group: http://www.meetup.com/nvcfug/