I use Telegraf + InfluxDB + Grafana for monitoring my home network and systems. Grafana has a learning curve for building panels and dashboards, but is incredibly flexible. I use it for more than server performance. I have a dual-monitor "kiosk" (old Mac mini) in my office displaying two Grafana dashboards. These are:

Network/Power/Storage showing:

• firewall block events & sources for last 12 hrs (from pfSense via Elasticsearch),
• current UPS statuses and power usage for last 12 hrs (Telegraf apcupsd plugin -> InfluxDB),
• WAN traffic for last 12 hrs ( from pfSense via Telegraf -> InfluxDB),
• current DHCP clients (custom Python script -> MySQL), and
• current drive and RAID pool health (custom Python scripts -> MySQL)

Server sensors and performance showing:

• current status of important cron jobs (using Healthchecks -> Prometheus),
• current server CPU usage and temps, and memory usage (Telegraf -> InfluxDB)
• server host CPU usage and temps, and memory usage for last 3 hrs (Telegraf -> InfluxDB)
• Proxmox VM CPU and memory usage for last 3 hrs (Proxmox -> InfluxDB)
• Docker container CPU and memory usage for last 3 hrs (Telegraf Docker plugin -> InfluxDB)

Netdata works really well for system performance for Linux and can be installed from the default repositories of major distributions.