High CPU usage and fan speed on Server One after latest StartOS/Knots update

StartOS Support
1

After updating StartOS and then updating all installed services as instructed, my Server One has been running much hotter than before.

Symptoms

  • Fans run at high speed continuously.

  • CPU temperature stays around 93°C.

  • bitcoind consistently uses around 50–120% CPU for hours after startup, even though the node is fully synced.

What I’ve observed

  • Bitcoin Knots is fully synced and continues to receive new blocks normally.

  • txindex is enabled (it has been enabled for a long time; this is not a new configuration).

  • There are no log messages indicating a reindex, database corruption, or repeated chain validation.

  • LND appears to function normally.

  • I found and removed an old DATUM notification URL (datum.embassy) from the Knots settings. That removed the related warning messages but did not change the CPU usage or temperature.

  • ss -tnp | grep 8332 and ss -tnp | grep bitcoind show no active RPC connections, so it doesn’t appear another service is continuously querying Knots.

  • top -H shows the CPU time is being spent inside bitcoind worker threads (b-http, b-httpw, b-msgha) rather than a single runaway thread.

System

  • Hardware: Start9 Server One

  • This behavior started immediately after updating StartOS and all installed services.

  • Before the update, the server did not run continuously at this temperature or fan speed.

Could you let me know whether this is a known issue with the current Knots package or StartOS release, and whether there are additional diagnostics I should collect?

2

Reseted all Knots Settings. Problem seems fixed.

1 Like