https://thegleanings.me/ A small notebook of notes on systems, reading, and writing. en Sun, 06 Sep 2026 01:00:00 GMT https://thegleanings.me/posts/what-the-building-holds-up.html https://thegleanings.me/posts/what-the-building-holds-up.html Sun, 06 Sep 2026 01:00:00 GMT A colleague asked why close work friends drift away. Most of it, I think, was held up by the building. https://thegleanings.me/posts/static-blog-local-first.html https://thegleanings.me/posts/static-blog-local-first.html Sun, 19 Jul 2026 01:00:00 GMT Zero dependencies, 9KB of HTML, an 80ms build, and a ten-year test I actually run. https://thegleanings.me/posts/filtered-and-hybrid-retrieval.html https://thegleanings.me/posts/filtered-and-hybrid-retrieval.html Sat, 17 Jan 2026 01:00:00 GMT A filter that keeps 1% of the corpus turns approximate search into a lottery. Partition, pre-filter, or over-fetch — with numbers. https://thegleanings.me/posts/vector-search-recall-latency.html https://thegleanings.me/posts/vector-search-recall-latency.html Sat, 08 Nov 2025 01:00:00 GMT ef_search, nprobe, and PQ are three dials on one curve. Measure recall against exact search, then choose where to sit. https://thegleanings.me/posts/profiler-that-tells-you-when-its-lying.html https://thegleanings.me/posts/profiler-that-tells-you-when-its-lying.html Sat, 02 Aug 2025 01:00:00 GMT Lost events, attach overhead, and a report that carries its own error bars. https://thegleanings.me/posts/ebpf-is-not-free.html https://thegleanings.me/posts/ebpf-is-not-free.html Sun, 15 Jun 2025 01:00:00 GMT A tracepoint on the hot path changes what you are measuring. The lost-events counter belongs in the result. https://thegleanings.me/posts/priority-preemption-and-queues.html https://thegleanings.me/posts/priority-preemption-and-queues.html Tue, 27 May 2025 01:00:00 GMT One bad PriorityClass preempted forty interactive pods and caused twelve minutes of errors. Design priority like an API. https://thegleanings.me/posts/bin-packing-and-scheduler-scores.html https://thegleanings.me/posts/bin-packing-and-scheduler-scores.html Wed, 14 May 2025 01:00:00 GMT MostAllocated, LeastAllocated, and a descheduler — 38% to 61% utilization, and the p99 bill that came with it. https://thegleanings.me/posts/kubernetes-scheduling-policy.html https://thegleanings.me/posts/kubernetes-scheduling-policy.html Tue, 06 May 2025 01:00:00 GMT Four layers decide where a pod lands. If you do not design them, the defaults will. https://thegleanings.me/posts/page-cache-and-the-cgroup-limit.html https://thegleanings.me/posts/page-cache-and-the-cgroup-limit.html Sat, 19 Apr 2025 01:00:00 GMT A container can be OOM-killed with a 600MiB heap and 3.4GiB of page cache. The limit counts both. https://thegleanings.me/posts/a-decision-tree-for-oomkilled.html https://thegleanings.me/posts/a-decision-tree-for-oomkilled.html Sun, 23 Feb 2025 01:00:00 GMT Exit 137 is a symptom. Four questions before you change a number. https://thegleanings.me/posts/prepared-statements-across-poolers.html https://thegleanings.me/posts/prepared-statements-across-poolers.html Thu, 05 Dec 2024 01:00:00 GMT Transaction pooling and named prepared statements disagree about what a session is. Here is the protocol-level fix. https://thegleanings.me/posts/three-thousand-connections.html https://thegleanings.me/posts/three-thousand-connections.html Sat, 12 Oct 2024 01:00:00 GMT PgBouncer in session mode was a queue with extra steps. Transaction pooling, prepared statements, and the pool math that actually matters.