Servers

🔎Find it: FusionReactor > Servers

The Server view presents an overview of the servers running a FusionReactor agent inside your infrastructure. From inside this view you can choose an overview of your servers or more detailed information about a subset of them. The Servers page is the only part of cloud with live mode.

Info

There is no offline filter on the servers home page. To debug offline servers go to Explore.

Live mode, immediate and historic data

• The Servers screen defaults to Live mode indicated by the orange clock.

• Live mode refers to data that is live streamed from an instance and is streamed in real-time. It is useful for viewing and resolving immediate issues.

• Immediate is data requested from instance in realtime.

• Historic data is stored traces which are powered by the time picker To view historic data, simply toggle the Live mode clock.

• Historic data can be filtered according to the default times, for example last hour or you can customize your time frame according to your needs.

Feature	Default state	Live mode	Immediate	Historic
Metrics	Live	✓	✗	✓
Web Requests Stored traces	Live	✓ ✗	✓ ✗	✗ ✓
Transactions Stored traces	Live	✓ ✗	✓ ✗	✗ ✓
JDBC Stored traces	Live	✓ ✗	✓ ✗	✗ ✓
Thread state CPU Sampler Thread visualizer	Immediate Live Live	✗ ✓ ✓	✓ ✗ ✗	✗ ✓ ✓
Profiles	Immediate	✗	✓	✗
Stack trace	Immediate	✗	✓	✗
Logs	Live	✓	✓	✗
Applications	Immediate	✗	✓	✗
Info	Immediate	✗	✓	✗

Learn more

Time picker

Tip

Pinching an individual metrics graph will enable deeper insight in historic mode only.

Filtering

The filter bar allows you to:

• Search for groups by name in the Groups search bar (far left of screen).
• Search for a server by name in the Servers search bar (left of screen).
• Filter by FusionReactor agent version, in the Agent dropdown.
• Show or hide labels, in the Labels dropdown

Note

Only on the overview screen.

• Choose to sort the entire page, in the Sort by dropdown by:
  • Name
  • Online time
  • Offline time

• Choose to sort the entire page,in the Sort order dropdown by:

  • Ascending
  • Descending

• Use the icon on the far right of the screen to clear all filters.

Detailed server overview

Each FusionReactor instance is represented as a server panel, which displays metric data based on the selected time frame, alongside some basic information for that instance.

Clicking on an individual server panel displays the following screen:

Metrics

🔎Find it: FusionReactor > Servers > Metrics (default)

The default view is the Web Server profile and on this screen you can filter by Profile, Graphs, Hide empty and View.

• In the Profile dropdown, sort the entire page by System profiles or Custom.

• In the Graphs dropdown, add required graphs such as, Buffer pool - mapped. The default graphs displayed are:

Default graphs
CPU (%)	JDBC activity (Requests / sec)	JDBC time (ms)
Memory (MB)	Request activity (Request / sec)	Request time (ms)

• In the Hide empty dropdown, you can choose remove graphs without data by selecting True or display all by selecting False.

• In the View dropdown, you can choose to display graphs in a Grid or Row.

Web Requests

🔎Find it: FusionReactor > Servers > Web Requests

Web Requests gives you the ability to view and administer running requests on your server.

On the Web Requests view, you can see if the transaction is running, if it's finished and the time that it finished. You can also view the application that generated the transaction, the URL of the transaction and finally, the total amount of time in milliseconds the transaction took to complete.

Transactions

🔎Find it: FusionReactor > Servers > Transactions

Transactions displays all transactions that are currently running on your server.

On the transactions view, you can see if the transaction is running, if it's finished and the time that it finished. You can also view the application that generated the transaction, the URL of the transaction and finally, the total amount of time in milliseconds the transaction took to complete.

JDBC

🔎Find it: FusionReactor > Servers > JDBC

The JDBC tab gives you the ability to view and administer running JDBC transactions on your server.This information is controlled by the storage strategy and other settings found on the JDBC Settings page.

On the JDBC view, you can see if the transaction is running, if it's finished and the time that it finished. You can also view the application that generated the transaction, the URL of the transaction and finally, the total amount of time in milliseconds the transaction took to complete.

Transaction details

🔎Find it: FusionReactor > Servers > Transactions > View details

Selecting the view details icon pictured above, displays the request details screen below containing detailed information about that transaction.

Tab selection

At the top of the request details screen there is a copy of the request line from the page you came from. Underneath that there are at least 5 tabs, plus 1 for each context on that transaction. The available tabs are as follows:

General

All types

Tracing

Web Request

JDBC Request

Sub-transactions

Web Request

Headers

Web Request

HTTPClient

JDBC

Web Request

JDBC

General

The General tab shows broad information about a request such as Stream metrics, Execution time, Memory levels and Flags.

Sub-transactions

The Sub-transactions tab shows any child transactions or internal transactions that are initiated as a result of the execution of a main transaction.

Headers

The Headers tab shows the HTTP headers for the request and response objects.

Learn more

Request details

Transaction filtering

All transactions can be filtered by:

Type	Description	Status
History	List of the most-recently completed requests.	Live
Activity	Transactions running when the page was loaded or last refreshed.	Live
Error History	Transactions flagged by FusionReactor as being in error.	Live
Event Snapshot History	Tracks the last (n) transactions which had an Event Snapshot generated and attached to the transaction.	Live
Longest Transactions	All transactions in a sequential order that have taken the highest amount of time to complete on this instance.	Live
Slow transactions	Transactions that have a run time that is longer than the threshold limit (8 seconds by default).	Live
By Memory	All transactions in a sequential order that have used the highest amount of memory on this instance.	Live
Stored Traces	Everything saved to a transaction including sampled and interesting transactions.	Historic

Info

Transactions stored in FR Cloud from offline instances can be found in the Explore section under Traces.

Threads

🔎Find it: FusionReactor > Servers > Threads

This feature retrieves and collects all live system thread data and their respective metadata. This includes: thread IDs, thread names, thread groups, thread states and critical CPU timing.

Sample information is given at the top left, this data relates to the current sample being processed:

Name	Description
JVM start time	The time the Java Virtual Machine was initialized.
Sample time	The time interval at which data was collected or measured.
Thread count	The number of threads the sampler is currently watching.
Total CPU time (ms)	The collective amount, to millisecond precision, of each thread's CPU time.

Threads filtering

🔎Find it: FusionReactor > Servers > Threads > Thread state

Threads can be filtered by:

• Any (default)

• RUNNING

• RUNNABLE

• DEADLOCKED

• WAITING

• TIMED_WAITING

• BLOCKED

CPU SAMPLER

🔎Find it: FusionReactor > Servers > Threads > CPU sampler

The CPU sampler retrieves all active threads and their CPU information since the Java Virtual Machine started. Alongside this, it also render the live state the thread is in. This data will be updated at every page refresh.

The Delta feature in the CPU Sampler is an incredibly useful feature. Once delta values are tracked, they provide the user with the current CPU usage since the button was clicked till the current time.

The Reset button (to the right of Delta) allows you to set a new time (baseline) from where the thread CPU time is calculated.

To assess the performance of certain CPU-heavy threads the user can sort the table by highest Thread CPU time (%). The more expensive threads will then be filtered to the top. The Thread CPU Time % is the percentage of that particular thread's CPU usage against the total CPU time of all running threads. From there, users can take further action to speed up their server using pre-existing FusionReactor tools, such as:

• Get a stack trace of the thread.

• Kill the thread.

• Profile the thread.

• Pause the thread.

NEW CPU snapshot

Snapshots provide CPU Sampler information at the exact moment of capture. Multiple CPU Snapshots can be taken and stored in FusionReactor.

Snapshots can be taken at any moment during the execution of a sample, this is achieved by the New CPU snapshot button.

Learn more

CPU snapshots

Thread visualizer

🔎Find it: FusionReactor > Servers > Threads > Thread visualizer

The Thread Visualizer page shows all threads within the Java Virtual Machine (JVM) for this server. Each color represents the state the thread was in when the data was updated.

The Thread Visualizer page is session based. As soon as the browser tab is closed or refreshed the data will be lost and the graph will restart.

Searching

The search bar allows the user to filter the threads shown based on if the thread name contains the characters in the search. For example, if the user inputted "http" into the search bar, any thread names containing http will be shown along with their table elements.

Threads can also be filtered using the dropdown by:

• Any (default)

• RUNNING

• RUNNABLE

• DEADLOCKED

• WAITING

• TIMED_WAITING

Info

Clearing the search bar will remove the filter and all threads will be displayed.

Sorting

Threads in the Thread visualizer page are sorted by five categories both ascending and descending:

Name	Description
Thread name	The name of the thread given as a string.
User time (ms)	The user-level CPU time for the specified thread.
CPU time (ms)	The total CPU time for a specified thread.
Wait time (ms)	Total time a thread has been waiting (including timed) for another thread to perform a particular action.
Blocked time (ms)	Total time a thread is blocked waiting for a monitor lock.

Learn more

Thread visualizer

Profiles

🔎Find it: FusionReactor > Servers > Profiles

This section provides more information about the Code Profiler details of a transaction or thread. The Profiler is used to discover what part of an application (method) consumes the most amount of CPU and time. Essentially the Code Profiler can be used to isolate performance bottlenecks in your code.

In the screenshot above, you can see if the transaction or thread is running, if it's finished and the time that it finished. You can also view the status code/IP, the application that generated the transaction, the ID/thread, the URL of the transaction or thread and finally, the total amount of time in milliseconds the transaction or thread took to complete.

Transaction details

Clicking the icon below Actions on the right of the screen, displays the following screen:

You have the ability to:

1. Decompile a class (Blue color line).
2. Decompile a method (Red color line).
3. Add a breakpoint into a method (Green color line).
4. See the individual times of each call in the Profiler window. This is represented as something similar to the following: 3.0% Self Time.

Note

You cannot access, decompile or debug any native methods.

Learn more

Profile examples

Stack trace

🔎Find it: FusionReactor > Servers > Stack trace

Stack traces provide information on the threads at a specific point in time.

Stack trace filtering

🔎Find it: FusionReactor > Servers > Threads > Thread state

Stack traces can be filtered by state:

• Any (default)

• RUNNING

• RUNNABLE

• DEADLOCKED

• WAITING

• TIMED_WAITING

• BLOCKED

Stack traces can also be filtered by view:

• All Threads

• Saved Traces

Learn more

Stack trace

Logs

🔎Find it: FusionReactor > Servers > Logs

The Logs tab allows you to view all records of events and activities that occur within a system, application, or infrastructure that are generated by your servers. They contain information about various aspects, such as user actions, errors, warnings, security events, and system performance. Logs are not stored and give live information about an instance.

Applications

🔎Find it: FusionReactor > Servers > Applications

The Applications tab provides an overview of the applications running on your instance.

Info

🔎Find it: FusionReactor > Servers > Info

The Info page of FusionReactor provides information on Agent details, Server type, Operating system details, Java details and the Environment FusionReactor is running within.

Note

When contacting support it is helpful to copy this page to your clipboard and attach a copy to your request to give our support engineers information on your configured environment.

Learn more

Server info

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