Is there a performance monitoring tool that works out of the box? (Debian)

I use CollectD for server performance parameters with Grinder and statsD on RHEL7.2 You can install Graphana or use in-built graphite frontend to play with metrics or to create your own dashboards. I never used them on debian though. But for sure, you will get either docker images or normal binaries over Git.

Heya,

For monitoring the performance of your servers on DigitalOcean, you can utilize the DigitalOcean Monitoring tool.

https://docs.digitalocean.com/products/monitoring/

This is a robust, integrated monitoring solution designed specifically for DigitalOcean environments. Here are the key features that align with your requirements:

1. Server Load Monitoring: DigitalOcean Monitoring allows you to track the load on your servers, ensuring that you can identify any performance bottlenecks or unusual spikes in demand.

2. CPU & Memory Usage: The tool provides detailed insights into CPU and memory usage, helping you to understand how resources are being utilized and when to scale up or optimize.

3. Network I/O Traffic: You can monitor network input/output traffic to get a clear picture of the data being transferred to and from your servers. This is crucial for identifying potential network-related issues.

4. Number of Processes: While DigitalOcean Monitoring provides extensive insights into system performance, it might not offer detailed process-level monitoring (like the exact number of processes). For this, you might need to complement it with additional process monitoring tools.

5. Number of HTTP Processes: Monitoring HTTP processes specifically might require more specialized application monitoring tools, as DigitalOcean’s primary focus is on infrastructure monitoring.

6. Number of TCP Connections: DigitalOcean Monitoring does include some network metrics, but for detailed TCP connection analysis, additional network monitoring tools might be necessary.

7. Disk I/O Usage: Disk input/output usage is a crucial metric, especially for database and file servers. DigitalOcean Monitoring includes the capability to track disk I/O, helping you to ensure that your storage subsystems are not becoming performance bottlenecks.

In summary, DigitalOcean Monitoring covers most of your requirements, especially for server load, CPU, memory, network I/O, and disk I/O usage. For more detailed process-level and specific network traffic monitoring (like HTTP processes and TCP connections), you may need to integrate additional specialized monitoring tools. Remember that monitoring is a layered approach, and combining tools often gives the best overall picture of system health and performance.