# Performance Metrics of OpenTelemetry

Monitoring your applications with Applications Manager OpenTelemetry allows you to track and measure key metrics such as response time, request count, exception count, and more directly from the Applications Manager console itself.

To begin:

1. Log in to the Applications Manager web client.
2. Navigate to **APM** → **OpenTelemetry Applications/Instances**.

Access the following tabs to obtain various parameters and metrics:

- [Overview](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#overview)
- [Transactions](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#transactions)
- [Database](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#database)
- [Traces](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#traces)
- [Exceptions](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#exceptions)
- [Service Map](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#service-map)
- [Milestones](https://www.manageengine.com/products/applications_manager/help/insight-milestone-marker.html)

**Note:**

- You can select the required application and service from the **Services** drop-down menu to view the corresponding metrics.
- You can also choose **All Services** from the drop-down menu to see the overall metrics (metrics for all the applications and services).

## Overview

The primary function of this tab is to provide a high-level overview of all the major parameters from an application's point of view. The top band displays the Apdex score, average response time, request count, exceptions count, and errors.

## Transactions

The metrics collected for the various transactions can be visualized in the following views:

- [Table view](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#transactions-table-view)
- [Graph view](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#transactions-graph-view)

### Table view

The various transactions running in the application are listed here, along with the associated metrics.

| Parameters | Description |
|---|---|
| Transaction | The name of the transaction. |
| Apdex | A numerical measure of user satisfaction, with 1 representing the highest and 0 representing the lowest. |
| Count | The number of times a user calls a particular transaction. |
| Errors(%) | The percentage of errors that occurs in a particular transaction. |
| Avg. Resp. Time | The average time a particular transaction takes to respond to a user request. |
| Min Resp Time | The lowest amount of time it takes a particular transaction to respond to a user request. |
| Max Resp Time | The highest amount of time it takes a particular transaction to respond to a user request. |

**Note:** When you click on an individual transaction, you will be taken to the corresponding *Graph view*.

### Graph view

In *Graph view*, you can inspect additional details about the transactions by clicking on the individual transaction listed on the left panel.

| Parameters | Description |
|---|---|
| Transaction | The name of the transaction. |
| Avg. Resp. Time | The average time a particular transaction takes to respond to a user request. |

The top band displays the response times (average, minimum, and maximum), Apdex score, request count, and errors.

In the sections below, you can also view the most recent five traces and the slowest five traces of this transaction, as well as their corresponding response times.

**Average Duration** - This graph depicts the response times of the transaction for the timestamps when it is called by the user. The **Min** is the minimum response time, and the **Max** is the maximum response time of the transaction.

## Database

The metrics collected for the various DB queries can be visualized in the following views:

- [Table view](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#database-table-view)
- [Graph view](https://www.manageengine.com/products/applications_manager/help/opentelemetry-perf-metrics.html#database-graph-view)

### Table view

The various DB queries executed for the application are listed here, along with the associated metrics.

| Parameters | Description |
|---|---|
| Database Operation | The name of the database operation being performed. |
| Count | The number of times a user performs a particular database operation. |
| Errors(%) | The percentage of errors that occurs in a particular database operation. |
| Error Count | The total number of errors that occur. |
| Avg. Resp. Time | The average time a particular database operation takes to respond to a user request. |
| Min Resp Time | The lowest amount of time it takes a database operation to respond to a user request. |
| Max Resp Time | The highest amount of time it takes a particular database operation to respond to a user request. |

### Graph view

Shows a list of overall Database Operations along with details like average response time, minimum response time, maximum response time, total request count, top five traces, and average duration graph for the selected Database Operation.

## Traces

The traces that have been run on various applications and all details pertaining to them are listed in this section.

| Parameters | Description |
|---|---|
| Start Time | Detailed start date and time when the trace was launched. |
| Transaction | The name of the transaction. |
| Time Taken | The amount of time it takes a particular trace to respond to a user request. |
| Http Method | The type of HTTP method used. |

## Exceptions

The **Exceptions** tab makes it easy to drill down on exceptions to a granular level.

| Attribute | Description |
|---|---|
| **Top Exceptions** |  |
| Exception | The name of the exception that has occurred in the application. |
| Count | The number of times that exception has occurred in the application. |
| **Top Error Codes** |  |
| Error Code | The error code that has occurred in the application. |
| Count | The number of times that error code has occurred in the application. |
| **Recent 5 Exception Traces** |  |
| Transaction Name | The name of the transaction where the exception has occurred. |
| Exception Count | This metric reflects the count of exceptions that occurred within a specific timeframe at the exceptions level, providing a detailed perspective on exception occurrences. **Exceptions = Fatal Exception + Warning Exception**<br>Where,<br><br>- **Fatal** - This pertains to the number of exceptions at the exceptions level with a severity level classified as 'Fatal.' These exceptions signify critical issues that can significantly impact the functionality of individual exceptions.<br>- **Warning** - This refers to the number of exceptions at the exceptions level with a severity level classified as 'Warning.' These exceptions highlight potential issues or non-fatal errors that may warrant attention but do not result in exception-level failures. |
| **Recent 5 Error Transactions traces (Recent 5 Error Transactions)** |  |
| Transaction Name | The name of the transaction where the error code has occurred. |
| Error Count | The number of requests (transactions) at the application level that has returned with a response code like 400 to 599. |

## Service Map

Service Map gives you a complete overview of your application infrastructure along with its connections to other dependent resources.

**Note:**

- The applications and services are represented as nodes.
- When one application or service makes a request to another application or service, it is indicated by a dotted arrow line.
- When you click on an individual transaction, you will be taken to the corresponding details in the **Traces** tab.