Application Service Dashboard

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It is a dashboard that allows you to see the status of applications running inside the container in real time. For normal data output of each widget, the node agent must have been installed in the Kubernetes environment, and the WhaTap agent must also have been installed in the application inside the container.

Note

WhaTap agent installation is supported for the applications developed in Java, Node.js, Python, and PHP.
You can access it through the Dashboard menu under Dashboard or Application.

Application service dashboard

Application dashboard allows you to collect key metrics of applications through agents, configure charts to monitor the metrics in real time, and view the past data. You can quickly identify and analyze application problems by using the widgets on the dashboard.

In case of general charts excluding CPU and memory, the stable data appears in blue and the elements identified as problems appear in red, making it easy to recognize the current status.

Application Dashboard

Viewing the past data

Application dashboard basically provides real-time monitoring features, in which you can view the past data.

Real-time mode	Non-real-time mode

Select in the time selector at the upper left of the screen.
Click the date and time to set the desired time zone.
Select Apply.

It updates the data in widgets placed on the dashboard based on the set time. To switch to the Realtime mode, select .

Checking the agent

Checking the agent connection status

Agent connection status

On the upper left of the screen, the right area of the time selector provides information that allows you to check the status of agents connected to the project. This allows you to immediately check whether the application server is running normally.

Total: Number of all agents connected to the project
Active: Number of active agents
Inactive: Number of inactive agents
: Can display or hide inactive agents.

Agent-based monitoring

Selecting the agent

By default, the dashboard displays the metrics collected from all agents in charts and you can also view the data by agent. Select one or more agents under the time selector. The data of the widgets on the dashboard is updated with the metrics of the selected agent(s).

Tip

To select all agents again while one or more agents is selected, deselect them or select Total.

Note

If there are numerous agents connected to the project, it is efficient to set the agent names to be short. For more information about setting the agent name, see the following.

Monitoring each classified agents

Selecting the agent by kind

You can select and monitor agents by each group classified through agent settings.

Agent: You can select an individual agent or all agents.
By kind: Agents can be monitored in each group classified by whatap.okind in the agent configuration.
By server: Agents can be monitored in each group classified by whatap.onode in the agent configuration.
Agent by kind: Only the agents classified as whatap.okind in the agent configuration can be monitored.
Agent by server: Only the agents classified as whatap.onode in the agent configuration can be monitored.

The widgets on the dashboard can be adjusted to the desired size and placed in the desired positions. You can also delete unnecessary widgets or add them again.

Click and hold the mouse on the Resize icon element at the lower right of the widget, and then drag it to the desired size. Grids with a uniform horizontal-to-vertical ratio appear and the size of the widget can be adjusted in each grid.

When you move the mouse cursor to the top of the widget, the cursor shape changes to Move icon . At this time, you can move the widget by dragging with your left mouse button and move to the desired position.

Right-click on a widget to delete. If you select Delete, the widget is deleted from the dashboard.

Move the mouse cursor to an empty space on the dashboard and then right-click on it. Select a widget to add from the pop-up menu. Place the widget to the desired position and then resize it.

Note

The widgets that can be added are fixed, but we plan to increase supports through future updates.

Preset

You can save and load the settings and layouts for widgets on the dashboard. The default preset (Default) cannot be changed, but you can create a new preset by resizing and placing widgets in the desired format.

Creating a new preset

Place the widgets in the desired format on the dashboard. You can also resize and place only the widgets to be frequently checked.
On the upper right of the screen, select .
Enter a new preset name.

To save the selected agent data, select Include agent selection history.
Select Save.

You can see the newly saved preset from the preset list.

Note

If any changes are made to the newly created preset, save the preset again. Select and then save the preset with the same name. Any changes are overwritten in the existing preset.
If you go to another menu without saving changes on the dashboard, the changes are not saved.
Presets are saved in your user account and cannot be shared with other users. We plan to update it for better features.

Deleting presets

If you have unused presets, you can delete them from the preset list. Select on the right of the item to delete from the preset list.

The features of the icon displayed on the top of the widget are as follows:

: You can see the features and information for major widgets.
Merge/view each: The agent data for the widget is displayed individually or merged in a graph.
Detail: A modal window appears where you can search the data of the widgets separately by agent.

Note

The provided options may differ depending on the widget.

Learning about widgets

Info

This document mainly describes the widgets placed on the Application dashboard. For more information about how to analyze transactions and users, services, and resources through Application dashboard, see the following documents:

You can see the application information through the agent installed on the application.

The failure status that can be checked through the transaction, can be recognized through the priority response time. If a transaction in progress does not end, this should be considered a failure. WhaTap divides sections for display by the time of the progress status. Blue (Normal) means transactions within the specified response time, Orange (Slow) means slow transactions with the response time of around 8 seconds, and Red (Very slow) means transactions with the response time that is twice as slow as normal. This allows you to intuitively recognize failures as fast as possible.

Active Transaction Speed Chart

Active transaction speed

You can see the status of active transactions (middle area) and completed transactions (right area). The water drop icon passing from left to right means a transaction. The status of active transactions is identified by the speed (Normal, Slow, Very Slow) in color and its number appears on the upper right.

Active Transaction

Active transaction

In the Active Transaction widget, the transactions in progress are displayed in the arc equalizer chart. You can see the status of delays by agent. The arc is divided by the number of agents. By representing the number of requests being processed by the server every 5 seconds, you can tell how long the request has been processed. Requests detected at an interval of 5 seconds are classified by color as follows to determine whether they are dangerous or not.

Red (Very Slow): 8 seconds or more
Orange (Slow): 3 to 8 seconds
Blue (Normal): 0 to 3 seconds

The situation where lots of blue colors are represented is not a problem. You must watch the trend to see whether some of them turn to orange or red. In case of a failure, the number of active transactions increases and the percentage of red color increases. On the other hand, a very responsive system with a high number of process transactions (TPS) might have a low number of active transactions.

On the upper left, the agent name with the most active transactions appears.
The middle number is a sum of active transactions of all agents.
Two bars around active transactions rotate around the chart at a three-step rate based on the throughput (TPS).
When you select a divided arc area, a pop-up window appears listing the transactions in progress on the agent. To check the transaction details, select an item in the transaction list.
Note
- If the item selected in the transaction list is a transaction that has already ended, select Show trace. The Transaction information window appears. For more information about the Transaction information window, see the following.
- For more information about transactions, see the following.

Agent Active Transaction

The Active Transaction widget displays on a chart the data merged based on the criteria selected in the agent selection options. On the other hand, the Agent Active Transaction widget allows you to individually check the agents included in the selected agent classification criteria.

Right-click the dashboard and then select the Agent Active Transaction widget from the widget list.

Active status

All agents in the project collect the active transaction count every 5 seconds, along with the progress status. The progress status is classified into METHOD, SQL, HTTPC, DBC, and SOCKET.

METHOD: Status in which the method is executing. Normal situations are displayed in blue.
SQL: SQL is running. If the SQL number increases, check for problems connecting to the database server.
HTTPC: It is calling any external API. If the HTTPC number increases, it means that the server connected to outside is not responding normally.
DBC: The transaction is attempting to get a new connection from the connection pool. If DB connection pools are insufficient, a delay occurs whenever a new connection request occurs, causing the performance failure. In this case, the DBC number increases.

Note
For more information about the DB connection delay, see the following.
SOCKET: Indicates the TCP connection attempt to an external system. If the SOCKET number continues to increase, there is a high possibility of failures due to disconnection of the external system.

Hitmap

The Hitmap chart represents the distribution of response times of completed transactions. The horizontal axis is the transaction end time. The vertical axis is the execution time. Transactions with longer execution times are at the top of the distribution. If you drag the chart area in Hitmap, the Trace analysis window appears that you can see the transaction information details. For more information about Trace analysis, see the following.

Normal transactions are displayed in light blue → blue → Indigo in order.
Erroneous transactions are displayed in yellow → orange → red in order.
The number on the upper right indicates the transaction count/error count in the chart.
If Y Auto is selected, the Y-axis (execution time) is automatically adjusted.
If Error is selected, only the error transactions appear.
Select or to zoom in/out the chart from 5 seconds to 80 seconds.

Note

The detailed information for the transactions with no error whose execution time is less than 500 ms is collected once every 5 minutes for each URL.
It does not affect the statistics such as TPS and average response time.
You can set a policy through the agent configuration. For more information, see the following.
See the following document for the procedure to analyze transactions through the hitmap widget.

The service-related widget can be used as the metric for application performance tuning.

TPS

Transaction Per Second (TPS) indicates the number of transactions processed per second and is the reference for service performance metric. The number of transactions processed every 5 seconds is converted to the number of transactions per second and is expressed with a chart. It displays TPS for the last 10 minutes.

Note

For more information about analyses for TPS, response time, and CPU utilization, see the following.

Average Res. time

Average response time

It monitors the times needed for the application server to return the request result. Average Res. time is meaningful as a tuning metric. The WhaTap's monitoring service calculates the average response time for transactions every 5 seconds.

Note

For more information about analyses for TPS, response time, and CPU utilization, see the following.

Container CPU

It is the container's CPU usage. You can see the change trend in CPU usage in real time.

Note

For more information about analyses for TPS, response time, and CPU utilization, see the following.

Heap Memory

Heap memory

You can see which servers are at risk by displaying the maximum available memory and the current memory for each server. The changes in memory usage over time can be seen in real time.

The memory line chart usually ripples continuously. It increases when using memory to process the requests from the application server. It decreases when memory is cleaned up through GC (Garbage Collection). Heap Memory metric is displayed with average values.

Note

Java and Node.js display the total heap memory and usage.
PHP, Python, and .Net display the process memory usage.

Tip

For more information about the heap memory and its chart analysis, see the following links.

Concurrent user

Concurrent User

It displays the number of real-time browser users. Every 5 seconds, users who made transactions within the last 5 minutes are counted and displayed without duplicates. Users are counted based on their browser's IP.

Note

In general, the connected user means a connected user who has access to the current network. However, web systems are different because they use connectionless networks. It does not mean that you are connected, but rather the user who sent the recent request can be measured.
Real-time (concurrent access) users indicate the users who are using the system in the same time zone. There are various ways to count or measure real-time (concurrent access) users.
The number of users is calculated by ** HyperLogLog** rather than simply adding up. ** HyperLogLog** is a probabilistic data structure that estimates the number of elements in a set with very little memory.

Note

The widgets marked with the All APPS. tag display the data for all agents.

Today's TPS

It displays the TPS for today by hour. You can check it by comparing with the TPS (gray) in the same time zone of yesterday. If you click , Stat/Report > Daily APP. Status appears.

Today's visits

Today's Visits

This metric shows the number of Concurrent user for the day by time zone. You can check it by comparing with the user count (gray) in the same time zone of yesterday. If you click , Stat/Report > Daily APP. Status appears.

Checking the real-time alert

If you select Alert Status on the upper right of the screen, the recent events appear. You can turn on or off the browser notifications by clicking the toggle menu.

Note

For more information about basic elements in the fixed menu area at the top of the screen, see the following.

Multi Service Dashboard

You can view and compare the selected applications in the individual card format.

Multi Service Dashboard

Application Service Dashboard