Blog
Running servers, explained
Practical, no-fluff writing on keeping Linux infrastructure healthy when you don’t have a dedicated ops team.
Why our server health score is not AI
Opservo uses AI to explain servers, not to score them. Why the 0–100 health score is a fixed standard, and why every lost point names its rule.
Read more →Our filesystem went read-only for 19 days. Nobody saw the warning.
Three alerts fired on one server over 11 days: kernel filesystem errors, a read-only remount, then a failed service. No alert channel was configured.
Read more →Our alerts went nowhere for 59 days. Here is what we changed.
For 59 days a webhook rejected every alert we sent our own team, including an 8-day Redis outage. What happened, and five checks for your alert channels.
Read more →How to Monitor and Alert on Redis Memory Fragmentation Before It Causes Latency Spikes
Learn how to track Redis memory fragmentation ratio, set meaningful alert thresholds, and act before fragmentation causes latency spikes in production.
Read more →How to Monitor Disk I/O Latency on a Linux Server and Find the Bottleneck
Learn how to measure disk I/O latency on Linux, interpret the numbers, and track down the process or device causing your storage bottleneck.
Read more →How to Monitor Server Uptime From Outside Your Network
Learn how to set up external uptime monitoring for your Linux servers — so you know about outages before your users do.
Read more →Linux server alerts without a monitoring team: the 6 that matter
The six alerts that catch real outages on a Linux server (disk, memory, service down, SSL, load, failed SSH), the thresholds to use, and how to have them running in five minutes with no Prometheus or Grafana.
Read more →Redis memory usage and eviction: how to monitor it before keys start disappearing
Read INFO memory, understand maxmemory-policy and evicted_keys, spot fragmentation, and set the two alerts that catch Redis memory trouble before the app does.
Read more →MySQL "Too many connections" (error 1040): monitor connection usage and fix it for good
Fix MySQL error 1040, Too many connections: find who is holding connections, raise max_connections safely, and alert before the limit is hit.
Read more →How to Reduce Nginx 502 and 504 Gateway Errors
Practical steps to diagnose and fix nginx 502 and 504 errors — from upstream timeouts to worker limits — before they wake you up at 3am.
Read more →How to Read and Make Sense of Nginx Error Logs
Learn to decode nginx error logs fast — understand severity levels, common errors, and the commands that actually help you fix production issues.
Read more →How to check disk space on Linux and find what is filling it up (df, du, ncdu)
Check free disk space on a Linux server with df, find the biggest directories and log files with du and ncdu, and clear the usual culprits safely.
Read more →How to Fix High Memory Usage on a Linux Server
Linux server running out of memory? Learn how to diagnose and fix high memory usage with real commands — before it takes down your app.
Read more →How to Tell If a Server Is About to Run Out of Memory
Learn the early warning signs of memory exhaustion on Linux servers — before your app crashes. Real commands, practical thresholds, and what to do.
Read more →What to Do When a Linux Server Load Average Is High
High load average on your Linux server? Learn how to diagnose the real cause and fix it fast — with practical commands and clear steps.
Read more →Monitor Docker container memory and CPU usage: docker stats, sorting, limits, alerts
How to read docker stats, sort containers by memory, tell a leak from a cache, and set memory limits that do not OOM-kill the wrong container.
Read more →How to find which process is using a port on Linux (ss, lsof, fuser)
Three commands that show the process holding a port on Linux, how to kill it safely with fuser -k 8080/tcp, and how to stop it grabbing the port again.
Read more →How to debug a service that keeps crashing and restarting (systemd, Docker, PM2)
A service in a restart loop: read the exit code, find the real error in journalctl or docker logs, spot OOM kills and bad config, and stop the loop.
Read more →nginx worker_processes and worker_connections: how to tune them, with numbers
What worker_processes auto really does, how to size worker_connections from ulimit -n, the worker_rlimit_nofile trap, and how to tell you set them wrong.
Read more →Introducing Opservo: the AI ops engineer for teams without an SRE
Monitoring that explains itself, predicts what’s about to break, fixes it with AI, and watches your uptime from outside — all from one 30-second install.
Read more →SSL certificate expiry monitoring: get an alert before a cert expires
How to check when an SSL certificate expires (openssl, one command), why calendar reminders fail, and how to alert on every domain at 30, 14 and 7 days.
Read more →Server monitoring without an SRE: the signals that actually matter
You don’t need a full observability stack to keep a few servers healthy — just the handful of signals that actually predict trouble, and what they mean.
Read more →Linux server slow? Check load, memory, I/O wait and swap in this order
A five-minute order of operations for a slow Linux box: uptime and load, free and swap, iostat wait, network, then the app. One command per step.
Read more →Datadog alternative for small teams: per-server pricing, no per-GB bill
Datadog charges per host, per GB ingested and per product. A cheaper Datadog alternative for 2 to 50 servers: ₹999 per server, free for 2 servers.
Read more →How to safely auto-restart a downed service
Auto-healing is great until it masks a real problem or melts your CPU in a restart loop. Here’s how to do it without shooting yourself in the foot.
Read more →What Opservo collects — and why it’s safe
Exactly what data the agent gathers, what it never touches, and the design choices that keep it from adding attack surface to your servers.
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