https://vvek.io/blog/Databases, programming, AI and how teams get work donehttps://vvek.io/blog/code-review-that-helps-approve-what-improves-the-code-save-the-nitpicks-for-late/https://vvek.io/blog/code-review-that-helps-approve-what-improves-the-code-save-the-nitpicks-for-late/Sun, 08 Nov 2026 10:14:00 +0000A practical code review standard for reviewers and authors: improve code health steadily, separate facts from taste, label nits and settle disagreements.https://vvek.io/blog/rate-limits-from-both-sides-handling-429-responses-and-limiting-your-own-api/https://vvek.io/blog/rate-limits-from-both-sides-handling-429-responses-and-limiting-your-own-api/Sun, 08 Nov 2026 08:33:00 +0000What a 429 means, how to retry with backoff and jitter, how to smooth traffic with a token bucket, and what to tell clients when you limit them.https://vvek.io/blog/sql-window-functions-per-group-answers-without-losing-your-rows/https://vvek.io/blog/sql-window-functions-per-group-answers-without-losing-your-rows/Sun, 08 Nov 2026 06:51:00 +0000A practical guide to Postgres window functions: OVER, PARTITION BY, ORDER BY, running totals, top-N per group and reusable WINDOW definitions.https://vvek.io/blog/a-job-queue-in-postgres-how-for-update-skip-locked-lets-workers-share-a-table/https://vvek.io/blog/a-job-queue-in-postgres-how-for-update-skip-locked-lets-workers-share-a-table/Sun, 08 Nov 2026 05:18:00 +0000Build a simple, safe job queue on Postgres: claiming rows with SKIP LOCKED, handling crashes with leases, retries, and the limits of the approach.https://vvek.io/blog/the-transactional-outbox-saving-data-and-sending-a-message-without-losing-either/https://vvek.io/blog/the-transactional-outbox-saving-data-and-sending-a-message-without-losing-either/Sun, 08 Nov 2026 03:37:00 +0000How the outbox pattern keeps a database write and its message in step, why duplicates still happen, and how to build a small version on Postgres.https://vvek.io/blog/blameless-postmortems-how-to-learn-from-an-incident-without-pointing-fingers/https://vvek.io/blog/blameless-postmortems-how-to-learn-from-an-incident-without-pointing-fingers/Sat, 07 Nov 2026 13:57:00 +0000When to write a postmortem, what goes in it, and how to keep it blameless so people report problems early. Practical notes based on Google's SRE book.https://vvek.io/blog/trace-sampling-with-opentelemetry-head-or-tail-and-what-each-one-costs-you/https://vvek.io/blog/trace-sampling-with-opentelemetry-head-or-tail-and-what-each-one-costs-you/Sat, 07 Nov 2026 13:03:00 +0000Keeping every trace gets expensive. How head and tail sampling differ in OpenTelemetry, when to combine them, and when not to sample at all.https://vvek.io/blog/evals-for-ai-agents-start-with-twenty-tasks-grade-the-outcome/https://vvek.io/blog/evals-for-ai-agents-start-with-twenty-tasks-grade-the-outcome/Sat, 07 Nov 2026 12:04:00 +0000How to test an AI agent before users do: tasks, trials, graders, pass@k versus pass^k, and a first eval set you can build in an afternoon.https://vvek.io/blog/prompt-caching-for-llm-apps-put-the-stable-parts-first-and-watch-the-usage-field/https://vvek.io/blog/prompt-caching-for-llm-apps-put-the-stable-parts-first-and-watch-the-usage-field/Sat, 07 Nov 2026 11:07:00 +0000How prompt caching works, how to order a prompt so it hits, what breaks the cache, and how to verify savings from the usage fields.https://vvek.io/blog/python-3-15-for-working-developers-lazy-imports-a-sampling-profiler-and-utf-8-by/https://vvek.io/blog/python-3-15-for-working-developers-lazy-imports-a-sampling-profiler-and-utf-8-by/Sat, 07 Nov 2026 10:11:00 +0000A practical look at Python 3.15: the lazy keyword, the Tachyon profiler, UTF-8 as the default encoding, frozendict and unpacking in comprehensions.https://vvek.io/blog/kubernetes-probes-what-liveness-readiness-and-startup-checks-should-and-should-n/https://vvek.io/blog/kubernetes-probes-what-liveness-readiness-and-startup-checks-should-and-should-n/Sat, 07 Nov 2026 09:19:00 +0000A practical guide to Kubernetes liveness, readiness and startup probes: what each one does, sensible settings, and the dependency-check mistake to avoid.https://vvek.io/blog/connection-pooling-for-postgres-what-pgbouncer-s-pool-modes-change/https://vvek.io/blog/connection-pooling-for-postgres-what-pgbouncer-s-pool-modes-change/Sat, 07 Nov 2026 08:22:00 +0000Why Postgres needs a pooler, how PgBouncer's session, transaction and statement modes differ, and which features stop working in transaction mode.https://vvek.io/blog/schema-changes-without-downtime-in-postgres-locks-not-valid-and-safer-migrations/https://vvek.io/blog/schema-changes-without-downtime-in-postgres-locks-not-valid-and-safer-migrations/Sat, 07 Nov 2026 07:34:00 +0000Which ALTER TABLE changes block your app, and how NOT VALID, VALIDATE CONSTRAINT and a lock timeout let you change a live Postgres table safely.https://vvek.io/blog/architecture-decision-records-write-down-why-not-only-what/https://vvek.io/blog/architecture-decision-records-write-down-why-not-only-what/Sat, 07 Nov 2026 06:46:00 +0000A short, practical guide to architecture decision records: what to put in one, when to write it, and how a decision log saves your team repeated debates.https://vvek.io/blog/giving-an-ai-agent-only-the-access-it-needs-a-least-privilege-checklist/https://vvek.io/blog/giving-an-ai-agent-only-the-access-it-needs-a-least-privilege-checklist/Sat, 07 Nov 2026 05:11:00 +0000Most agent mishaps come from too many tools, too many permissions or too much autonomy. A practical checklist for narrowing all three, based on OWASP guidance.https://vvek.io/blog/go-1-27-in-practice-generic-methods-goroutine-leak-profiles-and-a-uuid-package/https://vvek.io/blog/go-1-27-in-practice-generic-methods-goroutine-leak-profiles-and-a-uuid-package/Sat, 07 Nov 2026 03:37:00 +0000A working developer's tour of the Go 1.27 release notes: generic methods, the goroutineleak profile, a standard uuid package, json v2 and go fix updates.https://vvek.io/blog/reading-explain-analyze-a-practical-guide-to-postgres-query-plans/https://vvek.io/blog/reading-explain-analyze-a-practical-guide-to-postgres-query-plans/Fri, 06 Nov 2026 15:44:00 +0000How to read EXPLAIN ANALYZE output in Postgres: costs, row estimates, scan types, buffers, and the habits that keep it safe to run.https://vvek.io/blog/postgresql-19-release-candidate-what-to-look-at-before-the-final-release/https://vvek.io/blog/postgresql-19-release-candidate-what-to-look-at-before-the-final-release/Tue, 03 Nov 2026 07:42:00 +0000A tour of the PostgreSQL 19 release notes: REPACK, parallel autovacuum, automatic I/O workers, sequence replication and the migration items to check.https://vvek.io/blog/mcp-goes-stateless-what-the-2026-07-28-revision-changes-for-server-authors/https://vvek.io/blog/mcp-goes-stateless-what-the-2026-07-28-revision-changes-for-server-authors/Mon, 02 Nov 2026 13:12:00 +0000The newest Model Context Protocol revision drops sessions and the initialize handshake. Here is what that means if you run or build an MCP server.https://vvek.io/blog/row-level-security-in-postgres-a-practical-guide-to-isolating-tenants/https://vvek.io/blog/row-level-security-in-postgres-a-practical-guide-to-isolating-tenants/Sun, 01 Nov 2026 05:47:00 +0000How Postgres row-level security works, the traps that catch people, and a small tenant isolation pattern you can try today.https://vvek.io/blog/idempotency-keys-making-retries-safe-in-any-api/https://vvek.io/blog/idempotency-keys-making-retries-safe-in-any-api/Sat, 31 Oct 2026 10:35:00 +0000Networks fail halfway. Idempotency keys, backoff and jitter let clients retry without charging, creating or sending twice.https://vvek.io/blog/workflow-or-agent-choosing-the-simplest-design-that-does-the-job/https://vvek.io/blog/workflow-or-agent-choosing-the-simplest-design-that-does-the-job/Fri, 30 Oct 2026 05:18:00 +0000Fixed workflows and autonomous agents suit different tasks. Five workflow patterns, tool design tips and a way to decide which one you need.https://vvek.io/blog/how-database-indexes-speed-up-reads-and-when-they-slow-down-writes/https://vvek.io/blog/how-database-indexes-speed-up-reads-and-when-they-slow-down-writes/Thu, 29 Oct 2026 09:56:00 +0000Learn when to use indexes for faster queries and when they hurt write performance.https://vvek.io/blog/introducing-vvek/https://vvek.io/blog/introducing-vvek/Thu, 22 Oct 2026 00:00:00 +0000A Manager agent that plans and hires, agents that work in chat beside your people, and you in charge of anything risky.https://vvek.io/blog/every-agent-gets-its-own-vm/https://vvek.io/blog/every-agent-gets-its-own-vm/Tue, 20 Oct 2026 00:00:00 +0000Agents that run code and browse the web need real computers. Here is how we give them one without risking yours.