47 articles tagged with Performance.
The cache-control header most teams under-use. How stale-while-revalidate and stale-if-error turned our CDN from a freshness liability into a latency and resilience win — with the gotchas.
Most CI caches either miss constantly or restore stale junk. The cache-key discipline, scope boundaries, and measurements that turned our pipeline cache from theatre into real minutes saved.
The single most useful Postgres extension you might not be using. The queries it surfaces, the indexes it implies, and the operational discipline of reading it weekly.
io_uring replaces epoll for new high-throughput services. The patterns that earn their place, the gotchas in older kernels, and where we'd still pick epoll.
Three caching patterns, three failure modes. The one we use most, the one that bit us, and the rule that decides which pattern fits which workload.
cpu.shares vs cpu.cfs_quota_us vs memory.max — the cgroup mechanics behind Kubernetes resource limits, and the surprises that explain the weird symptoms you've seen.
EXPLAIN ANALYZE output is dense and intimidating. Once you can read it, most slow-query investigations finish in minutes. The patterns we keep seeing.
bpftrace one-liners replace strace, perf top, and a half-dozen ad-hoc debugging scripts. The patterns that actually earn their place when you're troubleshooting at 2 AM.
There are two hard problems in computer science." We've worked on the cache-invalidation one for a while. The patterns that hold up at scale and the ones that look clean and aren't.
Why Postgres connection limits bite at unexpected times, the pooling layer we put in front, and the pool-mode tradeoffs we learned the hard way.
A 2 AM incident, the autovacuum settings that caused it, and the parameter changes that prevented the next one. The discipline that took our biggest Postgres host from periodic stalls to steady.
