Thermals on a 2014 Mac mini Are a Production Signal
A production-engineering deep dive into thermals on a 2014 mac mini are a production signal, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
performance
Linux PSI Changed How I Think About Saturation
A production-engineering deep dive into linux psi changed how i think about saturation, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
My First SIPp Load Test Was Mostly About Defining a Useful Scenario
SIPp could generate a lot of calls, but the hard part was deciding what behavior to simulate and what failure actually meant.
Disk Throughput Is Not Disk Latency
A production-engineering deep dive into disk throughput is not disk latency, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
FreeSWITCH Capacity Testing Needed More Than a Calls-Per-Second Number
Call setup rate, concurrent calls and media work stress different parts of a voice platform.
Why a Worker Might Disable Gossip, Mingle, and Heartbeats
The operational trade-offs visible in the Voiceware low-worker command.
Why I Monitor MemAvailable Instead of “Free RAM”
A production-engineering deep dive into why i monitor memavailable instead of “free ram”, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Disabling One Metric Family Can Be Better Than Tuning the Whole Monitoring Stack
The fastest observability optimization came from identifying one costly collector instead of globally lowering fidelity.
Container I/O Pressure Shows Waiting, Not Just Bytes
A workload can perform modest disk throughput and still suffer because requests are waiting behind slow storage or competing I/O.
High, Standard, and Low Queues: Designing for Contention
How priority classes can turn one background-processing system into controlled lanes.
Load Average Without CPU Count Is Almost Meaningless
A production-engineering deep dive into load average without cpu count is almost meaningless, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Clock Synchronization Is an Availability Dependency
A production-engineering deep dive into clock synchronization is an availability dependency, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Monitoring TCP Retransmission on a Server That Also Runs VoIP
A production-engineering deep dive into monitoring tcp retransmission on a server that also runs voip, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Swap Usage Alone Is a Bad Memory Alert
A production-engineering deep dive into swap usage alone is a bad memory alert, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Disk Full and Inodes Full Are Two Different Outages
A production-engineering deep dive into disk full and inodes full are two different outages, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
IOPS and Throughput Answer Different Storage Questions
A database doing many tiny synchronous operations and a backup streaming large files can show similar disk utilization with very different access patterns.
Page Cache Is Not a Memory Leak
A production-engineering deep dive into page cache is not a memory leak, grounded in the 2014 Mac mini hserver observability stack and its accepted runtime evidence.
Context Switches and Interrupts Explain Some Invisible CPU Cost
CPU percentage alone did not reveal when the kernel was spending more work scheduling tasks or servicing device activity.