Operations | Monitoring | ITSM | DevOps | Cloud

HAProxy monitoring guide: the stats page and socket, the built-in Prometheus exporter, the metrics that matter, why queue time averages mislead, and alerts. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

GKE monitoring guide: what Google Kubernetes Engine collects by default, which metric packages to turn on, Autopilot limits, and the alerts to set. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

ClickHouse monitoring guide: the Prometheus endpoint, the system tables that explain slow queries, the Too many parts limits, replication lag and alerts. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

Apache Spark monitoring guide: what the Spark UI shows, how to keep it after a job ends, finding skew and spill, Prometheus metrics, and alerts. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

Multi-cloud monitoring guide: why the same metric differs across AWS, Azure and GCP, and how to normalize it with OpenTelemetry into one view. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

Set up the NVIDIA DCGM Exporter with Docker or Helm, pick the right DCGM metrics, enable profiling counters, map GPUs to Kubernetes pods, and add alerts. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

A practical comparison of the best observability tools in 2026: Last9, Datadog, Grafana Cloud, New Relic, Dynatrace, Honeycomb, Coralogix and SigNoz. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

An error budget is the unreliability an SLO allows. Learn to calculate it, track burn rate, set multiwindow alerts in PromQL and write an error budget policy. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

Grafana Cloud pricing broken down: free tier limits, Pro rates for metrics, logs and traces, how active series and DPM are billed, and worked cost examples. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.

How to monitor a Rails application in production: reading Puma's stats endpoint, spotting GC pressure, and finding the query that's actually slow. Sejal Pandey works on content and growth at Last9, writing about observability, reliability, and SRE practices.