MicroVMs
Debugging Production Without Touching Production
The bug only reproduces with real state. Copying the database loses the parts that matter. Cloning the whole machine keeps them.
DevOps
Consumer Lag Is Not a Throughput Problem Until You Prove It Is
Lag climbing on one partition while the rest keep up tells you something specific. Here is how to read the numbers before you add consumers that cannot help.
MicroVMs
Your Database Got Slower and Nothing in Your Code Changed
Query times doubling at unpredictable hours with no deploy and no traffic spike. When the cause is not in your process, it is usually not on your machine…
Deep Dive
How a MicroVM Boots in Under a Second
Traditional VMs take thirty seconds. Firecracker takes 125 milliseconds. The difference is everything it refuses to do.
Performance
How to Read a Flame Graph in Sixty Seconds
Width is time, stacking is call depth, and left to right means nothing. Once those three facts land, flame graphs become the fastest way to find a bottleneck.
Debugging
How Breakpoints Actually Work: INT3 and ptrace
Setting a breakpoint rewrites your program's machine code while it runs. Here is the mechanism, from the 0xCC byte up to why conditional breakpoints are slow.
Debugging
strace for Web Developers: What Your App Asks the Kernel
When your profiler shows nothing and your logs are silent, strace shows you every syscall with timings. Here is a practical subset worth knowing.
Docker
Containers Share a Kernel and That Is the Whole Story
The difference between a container and a microVM is one sentence long, and almost every isolation decision follows from it.