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Update docs for dotnet-counters #47874

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a9828b9
Update docs for `dotnet-counters`
jonathanpeppers Aug 6, 2025
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Merge branch 'main' into dev/peppers/dotnet-counters
jonathanpeppers Oct 13, 2025
2ee4bd3
Update docs/core/diagnostics/dotnet-counters.md
jonathanpeppers Nov 3, 2025
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Update dotnet-counters.md
jonathanpeppers Nov 3, 2025
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10 changes: 7 additions & 3 deletions docs/core/diagnostics/dotnet-counters.md
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---
title: dotnet-counters diagnostic tool - .NET CLI
description: Learn how to install and use the dotnet-counter CLI tool for ad-hoc health monitoring and first-level performance investigation.
ms.date: 11/17/2020
ms.date: 08/06/2025
ms.topic: reference
---
# Investigate performance counters (dotnet-counters)

**This article applies to:** ✔️ `dotnet-counters` version 3.0.47001 and later versions.
**This article applies to:** ✔️ `dotnet-counters` version 10.0 and later versions.

Counters can be read from applications running .NET 5 or later.

Expand Down Expand Up @@ -70,7 +70,7 @@ Periodically collect selected counter values and export them into a specified fi
### Synopsis

```dotnetcli
dotnet-counters collect [-h|--help] [-p|--process-id] [-n|--name] [--diagnostic-port] [--refresh-interval] [--counters <COUNTERS>] [--format] [-o|--output] [-- <command>]
dotnet-counters collect [-h|--help] [-p|--process-id] [-n|--name] [--diagnostic-port] [--refresh-interval] [--counters <COUNTERS>] [--format] [-o|--output] [--dsrouter <ios|ios-sim|android|android-emu>] [-- <command>]
```

### Options
Expand Down Expand Up @@ -230,6 +230,10 @@ dotnet-counters monitor [-h|--help] [-p|--process-id] [-n|--name] [--diagnostic-

A comma-separated list of counters. Counters can be specified `provider_name[:counter_name]`. If the `provider_name` is used without a qualifying list of counters, then all counters from the provider are shown. To discover provider and counter names, use the [dotnet-counters list](#dotnet-counters-list) command. For [EventCounters](event-counters.md), `provider_name` is the name of the EventSource and for [Meters](metrics.md), `provider_name` is the name of the Meter.

- **`--dsrouter {ios|ios-sim|android|android-emu}`**

Starts [dotnet-dsrouter](dotnet-dsrouter.md) and connects to it. Requires [dotnet-dsrouter](dotnet-dsrouter.md) to be installed. Run `dotnet-dsrouter -h` for more information.
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@gewarren gewarren Aug 8, 2025

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Suggested change
Starts [dotnet-dsrouter](dotnet-dsrouter.md) and connects to it. Requires [dotnet-dsrouter](dotnet-dsrouter.md) to be installed. Run `dotnet-dsrouter -h` for more information.
(Available starting in .NET 10.) Starts [dotnet-dsrouter](dotnet-dsrouter.md) and connects to it. Requires [dotnet-dsrouter](dotnet-dsrouter.md) to be installed. Run `dotnet-dsrouter -h` for more information.

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@jonathanpeppers jonathanpeppers Nov 3, 2025 •
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I made it say "(Available in dotnet-counters 9.0.652701 and later versions.)"


**`-- <command>`**

After the collection configuration parameters, the user can append `--` followed by a command to start a .NET application. `dotnet-counters` will launch a process with the provided command and monitor the requested metrics. This is often useful to collect metrics for the application's startup path and can be used to diagnose or monitor issues that happen early before or shortly after the main entrypoint.
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2 changes: 1 addition & 1 deletion docs/core/diagnostics/dotnet-gcdump.md
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Expand Up @@ -127,7 +127,7 @@ dotnet-gcdump collect [-h|--help] [-p|--process-id <pid>] [-o|--output <gcdump-f

By default, dotnet-gcdump listens at the specified address. You can request dotnet-gcdump to connect instead by appending `,connect` after the address. For example, `--diagnostic-port /foo/tool1.socket,connect` will connect to a .NET runtime process that's listening to the `/foo/tool1.socket` Unix domain socket.

- **`--dsrouter {ios|ios-sim|android|android-emu}**
- **`--dsrouter {ios|ios-sim|android|android-emu}`**

Starts [dotnet-dsrouter](dotnet-dsrouter.md) and connects to it. Requires [dotnet-dsrouter](dotnet-dsrouter.md) to be installed. Run `dotnet-dsrouter -h` for more information.

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