https://github.com/rafaelpadovezi/thread-pool-starvation
Thread pool starvation debug sample
https://github.com/rafaelpadovezi/thread-pool-starvation
aspnet performance-metrics
Last synced: about 2 months ago
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Thread pool starvation debug sample
- Host: GitHub
- URL: https://github.com/rafaelpadovezi/thread-pool-starvation
- Owner: rafaelpadovezi
- Created: 2023-09-02T16:47:06.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2024-01-01T23:10:36.000Z (over 1 year ago)
- Last Synced: 2024-01-02T01:11:33.334Z (over 1 year ago)
- Topics: aspnet, performance-metrics
- Language: C#
- Homepage:
- Size: 30.3 KB
- Stars: 3
- Watchers: 2
- Forks: 0
- Open Issues: 5
-
Metadata Files:
- Readme: README.md
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README
# ThreadPool starvation diagnostic sample
Aspnet app sample to detect threadpool starvation using:
- [`dotnet-counters`](https://learn.microsoft.com/en-us/dotnet/core/diagnostics/dotnet-counters)
- [`dotnet-stack`](https://learn.microsoft.com/en-us/dotnet/core/diagnostics/dotnet-stack)
- [`hey`](https://github.com/rakyll/hey)
- [`dotnet-monitor`](https://learn.microsoft.com/en-us/dotnet/core/diagnostics/dotnet-monitor)
- [`prometheus`](https://prometheus.io/)
- [`grafana`](https://grafana.com/docs/grafana/latest/)
## Step by step - dotnet-counters
Run the app using docker
```
docker compose up app
```
Monitor the application using dotnet-counters
```
docker exec -it thread-pool-test-app dotnet-counters monitor -n dotnet
```
To get the `dotnet-stack` run the following
```
docker exec -it thread-pool-test-app dotnet-stack report -n dotnet
```
## Step by step - dotnet-monitor + prometheus + grafana
Running the app will start a container with `dotnet-monitor`. This container is setup to get diagnostic commands from the app container through a [diagnostic port](https://learn.microsoft.com/en-us/dotnet/core/diagnostics/diagnostic-port). Dotnet monitor exposes endpoints with usefull information:
- http://localhost:52323/info
- http://localhost:52323/processes
- http://localhost:52325/metrics
A full list can be seem here: https://github.com/dotnet/dotnet-monitor/blob/main/documentation/api/README.md.
The metrics endpoint captures metrics in the Prometheus exposition format.
To start grafana use the command bellow:
```
docker compose up grafana
```
The compose provisions grafana with prometheus datasource and the community provided [dotnet-monitor dashboard](https://grafana.com/grafana/dashboards/19297-dotnet-monitor-dashboard/). Once is started up go to http://localhost:3000/dashboards (user: `admin`, password: `admin`)
## Load tests
Start the load test that hits the sync endpoint
```
docker compose up send-load-sync
```
Start the load test that hits the async endpoint
```
docker compose up send-load-async
```