Practical Troubleshooting guides from East4Serv.
An application killed by the Linux out-of-memory mechanism is an outcome, not a diagnosis. The cause may be a genuine rise in workload demand, a memory leak, an overly small contai...
“No space left on device” can mean the filesystem has no free bytes, has no free inodes, is read-only, or has a quota limit. Deleting the largest visible file without finding the cause...
High CPU is a symptom, not a diagnosis. A brief peak during a scheduled build or backup may be expected. Sustained saturation with rising request latency, failed health checks, or queue...
An Nginx 502 Bad Gateway response means Nginx could not obtain a valid response from its upstream. On a PHP site, the upstream is often PHP-FPM, but the same status can arise from a TCP...
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