Understanding Server Uptime: What Actually Causes Downtime

"99.9% uptime" gets thrown around constantly, but understanding what actually causes the remaining 0.1% — and who's responsible for it — helps set realistic expectations for any hosting relationship.

Causes Within the Host's Control

• Hardware failure — drives, RAM, or other physical components failing (rare on well-maintained enterprise hardware, but never zero)
• Network infrastructure issues — a host's own routing, switching, or upstream connectivity problems
• DDoS attacks — if not properly mitigated, an attack can take a server or even a whole node offline
• Scheduled maintenance — necessary but should be announced in advance and kept brief

Causes Outside the Host's Control

• Your own application crashing — a plugin conflict, a bad code deployment, or a misconfiguration isn't a hosting failure, even though it looks like "the server is down"
• Running out of allocated resources — a server hitting its RAM/CPU ceiling and becoming unresponsive is a sizing issue, not a hosting failure
• DNS propagation delays — if you've recently changed domain settings, apparent "downtime" may just be DNS still propagating, unrelated to actual server status

Reading an SLA Correctly

A real Service Level Agreement should specify what's actually measured (individual server uptime vs. network-wide uptime, which can hide real individual outages) and what remedy exists if it's missed (service credit, at minimum) — see what SLA should you expect for a deeper breakdown of reading these numbers.

What to Actually Look For in a Host

• A public, real status page showing actual incident history — not just a claimed percentage
• Clear communication during incidents, not silence
• DDoS protection included by default, since that's one of the most common preventable causes of downtime for public game servers specifically

RepublicNodes publishes a live status page showing real service status, scheduled maintenance, and incident history across the network.