Live Charts

Live Charts

The Overview and Live tabs show line charts for server speed (TPS), tick lag (MSPT), memory, players, CPU, disk, and network.

---

At a glance

• Time range: from 1 minute up to 90 days (depends on how much history is saved)
• Overview: linked 1h / 6h / 24h buttons for the main vitals
• Live tab: full range picker plus refresh speed
• Hover (or drag on touch) to see exact time and value

---

Where charts appear

Location	What you see
Overview	TPS, CPU, memory, players — shared 1h / 6h / 24h range
Live	TPS, lag, memory, players, CPU, disk, network
Crashes	Small TPS chart for 10 minutes before a crash

---

Chart controls

Time range — how far back the line goes. Longer ranges may refresh less often to keep the page smooth.

Display refresh — how often the latest number updates (1s to paused). This is separate from how much history is stored.

---

Reading the lines

• Green / yellow / red dot on the right — latest value health for TPS, lag, CPU
• Dashed guides — e.g. 20 TPS target, 50 ms lag budget
• Below the chart — latest value and low/high for the window; or exact point when hovering

If charts stay empty after an update, hard-refresh the browser (Ctrl+Shift+R).

---

Hosted servers and memory

On some hosts, “free RAM” is misleading because the game runs in a container. Watchtower charts show memory in use where possible, and labels Java heap separately. See Reading Metrics on Hosted Servers.

Long-term patterns (busy hours, heatmaps) are on the Insights tab — not on Live charts.

---

Technical details

Setting	File	Effect
liveSampleIntervalSeconds	watchtower-server.toml	How often metrics are recorded (default 1s)
liveRetentionHours	watchtower-server.toml	Max history kept (default 90 days)

Restart required for TOML changes. See Configuration.

Minute-by-minute history for Insights is stored in watchtower/performance-rollups.json (L1_ROLLUP_ENABLED, L1_RETENTION_DAYS in watchtower.conf).

---

See also

• Dashboard Tabs#Live
• Reading Metrics on Hosted Servers
• Troubleshooting