Kubernetes readiness vs liveness probes: the production difference
Kubernetes readiness vs liveness probes: the production difference. A practical production guide with diagnostic commands, failure interpretation, and a…
Kubernetes requests vs limits: stop guessing resource settings
Kubernetes requests vs limits: stop guessing resource settings. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Kubernetes rollout stuck: unavailable replicas and progress deadlines
Kubernetes rollout stuck: unavailable replicas and progress deadlines. A practical production guide with diagnostic commands, failure interpretation, and a…
Kubernetes Secret mount failure: names, keys, and permissions
Kubernetes Secret mount failure: names, keys, and permissions. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Kubernetes Service has no endpoints: selector and readiness debugging
Kubernetes Service has no endpoints: selector and readiness debugging. A practical production guide with diagnostic commands, failure interpretation, and a…
Linux clock drift breaks TLS, logs, and distributed systems
Linux clock drift breaks TLS, logs, and distributed systems. A practical production guide with diagnostic commands, failure interpretation, and a safe…
High context switches on Linux: when concurrency becomes overhead
High context switches on Linux: when concurrency becomes overhead. A practical production guide with diagnostic commands, failure interpretation, and a…
Linux CPU steal time: your VM is waiting on the hypervisor
Linux CPU steal time: your VM is waiting on the hypervisor. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Linux cgroup CPU throttling: high latency below 100% CPU
Linux cgroup CPU throttling: high latency below 100% CPU. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Deleted files still consuming disk: find open descriptors
Deleted files still consuming disk: find open descriptors. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Read iostat like an operator: await, queue, and utilization
Read iostat like an operator: await, queue, and utilization. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Linux file descriptor leak: sockets, files, and limits
Linux file descriptor leak: sockets, files, and limits. A practical production guide with diagnostic commands, failure interpretation, and a safe decision…
Linux CPU at 100%: identify process, thread, and cause
Linux CPU at 100%: identify process, thread, and cause. A practical, safe workflow with diagnostic commands, interpretation, common traps, and a repeatable…
Linux memory pressure: free, cache, swap, and OOM explained
Linux memory pressure: free, cache, swap, and OOM explained. A practical, safe workflow with diagnostic commands, interpretation, common traps, and a…
Disk has free space but writes fail: inode exhaustion
Disk has free space but writes fail: inode exhaustion. A practical production guide with diagnostic commands, failure interpretation, and a safe decision…
High I/O wait on Linux: latency, queue, or idle CPU?
High I/O wait on Linux: latency, queue, or idle CPU?. A practical production guide with diagnostic commands, failure interpretation, and a safe decision…
Linux kernel log triage: hardware, filesystem, OOM, and network
Linux kernel log triage: hardware, filesystem, OOM, and network. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Service listens on localhost but not the network
Service listens on localhost but not the network. A practical production guide with diagnostic commands, failure interpretation, and a safe decision sequence.
Linux load average is not CPU usage
Linux load average is not CPU usage. A practical, safe workflow with diagnostic commands, interpretation, common traps, and a repeatable operating sequence.
High load average with low CPU usage
High load average with low CPU usage. A practical production guide with diagnostic commands, failure interpretation, and a safe decision sequence.
Linux free vs available memory: stop fearing the page cache
Linux free vs available memory: stop fearing the page cache. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Linux packet drops: interface, kernel, socket, or application
Linux packet drops: interface, kernel, socket, or application. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Linux OOM killer analysis: read the victim selection
Linux OOM killer analysis: read the victim selection. A practical production guide with diagnostic commands, failure interpretation, and a safe decision…
Too many open files: find the leak before raising limits
Too many open files: find the leak before raising limits. A practical, safe workflow with diagnostic commands, interpretation, common traps, and a…