Guides
Uptime monitoring guides
Practical guides on uptime monitoring, SSL and domain expiry, downtime alerts and multi-region monitoring, from the team that builds PageWarden.
What is an SLA? Uptime SLAs and the nines, explained
An SLA is a commitment about the level of service you can expect, often an uptime percentage like 99.9%. What the nines allow, and how SLA, SLO and SLI fit.
Read guideIncident severity levels (SEV1 to SEV5), explained
Incident severity levels rank how badly an incident hits users, from SEV1 to SEV5. What each level means, how to assign one, and how it drives your response.
Read guideWhat is MTTR? Mean time to recovery, explained
MTTR is the average time it takes to restore a service after a failure. What the acronym means, how to calculate it, and how faster detection lowers it.
Read guideWhat is telemetry? Metrics, logs and traces, explained
Telemetry is the automatic collection of data from a system so you can see what it is doing from the outside. What metrics, logs and traces are, and how they differ.
Read guideHow to write an incident response plan
An incident response plan is the playbook your team follows when something breaks. What to put in one, the phases it should cover, and how to keep it usable.
Read guideWhat is incident management? A practical guide
Incident management is the process of detecting, responding to, and learning from unplanned disruptions. The lifecycle, the key concepts, and how they fit together.
Read guideDomain expiry monitoring: how to never lose a domain to a missed renewal
A lapsed domain takes your site and email down at once, and it is completely preventable. How WHOIS-based domain expiry monitoring warns you in time.
Read guideStatus pages vs uptime monitoring: what is the difference?
Uptime monitoring detects an outage; a status page communicates it. Here is how they differ, why growing teams want both, and how they work together.
Read guideWhat is uptime monitoring?
What uptime monitoring is, how checks and alerts work, why confirming a failure across regions matters, and what to watch beyond a plain HTTP check.
Read guideHow to set up uptime monitoring for a website
A step-by-step guide to setting up uptime monitoring for a website, from your first HTTP check to multi-region confirmation and downtime alerts.
Read guideSSL certificate expiry monitoring: never get caught by a lapsed cert
Why expired certificates take sites down, and how SSL certificate expiry monitoring warns you before the chain breaks.
Read guideUptime alerts in Slack and Discord: a setup guide
How to route uptime alerts into Slack and Discord with incoming webhooks, plus webhook payloads for your own tooling.
Read guideWhy a single monitoring location gives you false downtime alerts
A single vantage point causes false downtime alerts. Here is how multi-region confirmation fixes flapping and false pages.
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