Trimfield
Practical engineering writing for people who keep systems alive.
Practical Notes on Postgres Connection Pooling
August 18, 2026
Postgres connections are heavy - each backend carries megabytes of memory and a full process - so every scaled-out installation grows a pooler, and every pooler grows a dialect. Session pooling is nearly transparent; transaction pooling is fast and unforgiving, quietly breaking session features like LISTEN, advisory locks and SET.
Most pooler incidents trace to respect: sessions checked out and never returned, cursors held across sleeps, and schema changes that iterate every table while holding one checkout. Transaction mode makes those bugs louder instantly, which shortens the debugging at the cost of breaking the code that committed them.
Data Residency Basics for Global Teams
June 5, 2026
Compliance requirements concerning data residency typically surface late in development, casually framed around keeping regional information confined to a specific territory. That casual framing conceals significant complexity: geographic residency mandates architectural redesign rather than simply …
When to Choose a Queue Over a Request
May 15, 2026
Traditional RPC calls remain popular due to straightforward causality: the client makes an invocation, waits for the response, and monitors latency directly. Asynchronous message queuing becomes essential when background tasks outlast active connections or when sudden volume surges threaten to overw…
The Hidden Cost of Chatty Microservices
October 4, 2026
Splitting a monolith into services trades local complexity for distributed complexity, and nowhere is that clearer than in fan-out. A request that used to make three function calls now makes three network calls, each with its own timeout, retry policy, and failure mode.…
Understanding TLS 1.3 Session Resumption
August 2, 2026
Shortening the standard handshake to a solitary round trip was an achievement, but session resumption delivers the true speed advantage for returning traffic. Transmitting data right away via pre-shared keys spares high-latency cellular connections the drag of multi-step cryptographic exchanges.…
More reading
- The Operator's Guide to Load Testing — Engineering, June 2, 2026
- Reading Latency Percentiles Without Fooling Yourself — Operations, August 21, 2026
- Why Edge Caching Still Matters in 2026 — Infrastructure, July 2, 2026
About us
Founded by former SREs and network engineers, our editorial desk focuses on the practical side of operating distributed services - less hype, more packet captures.