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…
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…
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…
Linux performance debugging: the first 10 minutes
Linux performance debugging: the first 10 minutes. A practical production guide with diagnostic commands, failure interpretation, and a safe decision sequence.
Linux process stuck in D state: why kill -9 does not work
Linux process stuck in D state: why kill -9 does not work. A practical production guide with diagnostic commands, failure interpretation, and a safe…
Linux PSI: detect CPU, memory, and I/O contention
Linux PSI: detect CPU, memory, and I/O contention. A practical production guide with diagnostic commands, failure interpretation, and a safe decision sequence.
Linux swap is used but memory is available: is that bad?
Linux swap is used but memory is available: is that bad?. A practical production guide with diagnostic commands, failure interpretation, and a safe…
systemd start request repeated too quickly
systemd start request repeated too quickly. A practical production guide with diagnostic commands, failure interpretation, and a safe decision sequence.
Zombie processes on Linux: what they consume and who must reap them
Zombie processes on Linux: what they consume and who must reap them. A practical production guide with diagnostic commands, failure interpretation, and a…