--- title: "#monitoring articles | Hashnode" description: "Explore 2,394 articles tagged #monitoring on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/monitoring" --- Tag # #monitoring 2,394 posts · 133 followers [Artem Senenko](https://hashnode.com/@slima4) · [6h ago](https://hashnode.com/posts/two-rejected-series-stalled-all-my-metrics/6af5fa210d3424f7c8464ed8) ### [Two rejected series stalled all my metrics](https://uptimepage.hashnode.dev/two-rejected-series-stalled-all-my-metrics?utm_source=hashnode&utm_medium=feed) TL;DR. Three alerts fired while production was healthy. My metrics account had gone over its active series limit, because a rate limit plugin in Caddy publishes 13 series for every client address. The 10 min read · [uptimepage.hashnode.dev](https://uptimepage.hashnode.dev/two-rejected-series-stalled-all-my-metrics?utm_source=hashnode&utm_medium=feed) [Max](https://hashnode.com/@pingogo) · [14h ago](https://hashnode.com/posts/your-uptime-monitor-says-200-ok-your-site-is-still-broken/6af59154f81ed60943e397d1) ### [Your uptime monitor says 200 OK. Your site is still broken.](https://pingogo.hashnode.dev/your-uptime-monitor-says-200-ok-your-site-is-still-broken?utm_source=hashnode&utm_medium=feed) Why status-code checks miss real outages, and how a simple keyword check closes most of the gap 6 min read · [pingogo.hashnode.dev](https://pingogo.hashnode.dev/your-uptime-monitor-says-200-ok-your-site-is-still-broken?utm_source=hashnode&utm_medium=feed) [Alfaz Mahmud Rizve](https://hashnode.com/@alfazreviews) · [20h ago](https://hashnode.com/posts/your-watchtower-can-t-see-a-dropout-build-a-heartbeat-check-that-can/6af53ed3733406bc852e8441) ### [Your Watchtower can't see a dropout: build a heartbeat check that can](https://alfazreviews.hashnode.dev/your-watchtower-can-t-see-a-dropout-build-a-heartbeat-check-that-can?utm_source=hashnode&utm_medium=feed) Disclosure: this piece contains one affiliate link, in the section on where to run the check. If you sign up through it, I earn a commission at no extra cost to you. A crash alert can't catch a workfl 5 min read · [alfazreviews.hashnode.dev](https://alfazreviews.hashnode.dev/your-watchtower-can-t-see-a-dropout-build-a-heartbeat-check-that-can?utm_source=hashnode&utm_medium=feed) [Sudhanshu Wani](https://hashnode.com/@TechBlog01) · [1d ago](https://hashnode.com/posts/measuring-latency-end-to-end-timestamp-chains-one-histogram-and-the-paint-time-trick/6af5b10a8eb11568125d02bc) ### [Measuring latency end to end: timestamp chains, one histogram, and the paint-time trick](https://techblog01.hashnode.dev/measuring-latency-end-to-end-timestamp-chains-one-histogram-and-the-paint-time-trick?utm_source=hashnode&utm_medium=feed) Timestamps at every hop, one histogram, and honest percentiles down to the paint 12 min read · [techblog01.hashnode.dev](https://techblog01.hashnode.dev/measuring-latency-end-to-end-timestamp-chains-one-histogram-and-the-paint-time-trick?utm_source=hashnode&utm_medium=feed) [perchdarbinyan](https://hashnode.com/@pdarb) · [1d ago](https://hashnode.com/posts/designing-data-center-monitoring-architecture-connecting-power-cooling-and-it-events/6af4143e1bd95665ca14a009) ### [Designing Data Center Monitoring Architecture: Connecting Power, Cooling and IT Events](https://iotforall.hashnode.dev/designing-data-center-monitoring-architecture-connecting-power-cooling-and-it-events?utm_source=hashnode&utm_medium=feed) Design data center monitoring that connects power, cooling and IT telemetry through shared asset models, quality checks and incident correlation. 7 min read · [iotforall.hashnode.dev](https://iotforall.hashnode.dev/designing-data-center-monitoring-architecture-connecting-power-cooling-and-it-events?utm_source=hashnode&utm_medium=feed) [Robin Sishodia](https://hashnode.com/@Sishodia) · [3d ago](https://hashnode.com/posts/aws-cloudwatch-basics-metrics-logs-and-alarms-for-your-resources/6af1f0e0dea7088ddd8dd048) ### [AWS CloudWatch Basics: Metrics, Logs and Alarms for Your Resources](https://sishodiarobin.hashnode.dev/aws-cloudwatch-basics-metrics-logs-and-alarms-for-your-resources?utm_source=hashnode&utm_medium=feed) Last time I looked at who changed things with CloudTrail. The next question is different: what is happening inside my resources right now? That is Amazon CloudWatch. What CloudWatch does Metrics: num 2 min read · [sishodiarobin.hashnode.dev](https://sishodiarobin.hashnode.dev/aws-cloudwatch-basics-metrics-logs-and-alarms-for-your-resources?utm_source=hashnode&utm_medium=feed) [LeadReef](https://hashnode.com/@leadreef) · [3d ago](https://hashnode.com/posts/free-uptime-monitoring-for-client-websites-uptimerobot-vs-better-stack-vs-hetrixtools-vs-uptime-kuma-2026/6af1d26ad4b4836de924b95f) ### [Free uptime monitoring for client websites: UptimeRobot vs Better Stack vs HetrixTools vs Uptime Kuma (2026)](https://leadreef.hashnode.dev/free-uptime-monitoring-for-client-websites-uptimerobot-vs-better-stack-vs-hetrixtools-vs-uptime-kuma-2026?utm_source=hashnode&utm_medium=feed) Short answer: for a freelancer watching a handful of client sites, UptimeRobot's free plan gives the most monitors (50, checked every 5 minutes), HetrixTools gives the fastest free checks (15 monitors 8 min read · [leadreef.hashnode.dev](https://leadreef.hashnode.dev/free-uptime-monitoring-for-client-websites-uptimerobot-vs-better-stack-vs-hetrixtools-vs-uptime-kuma-2026?utm_source=hashnode&utm_medium=feed) [1](https://hashnode.com/posts/free-uptime-monitoring-for-client-websites-uptimerobot-vs-better-stack-vs-hetrixtools-vs-uptime-kuma-2026/6af1d26ad4b4836de924b95f) [Rajesh Ravi](https://hashnode.com/@rajeshravi) · [5d ago](https://hashnode.com/posts/zero-downtime-monitoring-in-oem-24ai-patching-your-oms-without-going-blind/6aef30394cf43edb0a6aaa3f) ### [Zero Downtime Monitoring in OEM 24ai: Patching Your OMS Without Going Blind](https://www.rajeshravi.com/zero-downtime-monitoring-in-oem-24ai-patching-your-oms-without-going-blind?utm_source=hashnode&utm_medium=feed) EM 24ai's Zero Downtime Monitoring keeps alerts and notifications live during OMS patching. Here's how it works and what your topology needs to get it. 8 min read · [rajeshravi.com](https://www.rajeshravi.com/zero-downtime-monitoring-in-oem-24ai-patching-your-oms-without-going-blind?utm_source=hashnode&utm_medium=feed) [Samuel Aniekeme](https://hashnode.com/@10xAnnie) · [5d ago](https://hashnode.com/posts/building-a-check-engine-light-for-my-homelab-with-grafana/6aef35a000c6c0e3cc8517d5) ### [Building a Check Engine Light for My Homelab with Grafana](https://10xannie.hashnode.dev/building-a-check-engine-light-for-my-homelab-with-grafana?utm_source=hashnode&utm_medium=feed) Why I stopped building wall art Most homelab Grafana dashboards are beautiful and useless: forty graphs, a world map of blocked IPs, and nobody knows which line should worry them. I rebuilt mine aroun 26 min read · [10xannie.hashnode.dev](https://10xannie.hashnode.dev/building-a-check-engine-light-for-my-homelab-with-grafana?utm_source=hashnode&utm_medium=feed) [dafili](https://hashnode.com/@vaultcheck) · [Nov 5](https://hashnode.com/posts/three-checks-that-all-answered-250/6aebfd01ca4741acb3e7632b) ### [Three Checks That All Answered 250](https://mediaforge-studio.hashnode.dev/three-checks-that-all-answered-250?utm_source=hashnode&utm_medium=feed) A probe that never read the SMTP greeting answered 250 for every address. Three checks in one day that reported success while measuring nothing. 6 min read · [mediaforge-studio.hashnode.dev](https://mediaforge-studio.hashnode.dev/three-checks-that-all-answered-250?utm_source=hashnode&utm_medium=feed)