Idées et mouvements qui comptent pour celles et ceux qui conçoivent, construisent et exploitent des logiciels—un regard bref sur l’actualité du métier.
Catégorie
Giant `IN` clauses inflate PostgreSQL planning time and spike p99 latency. Learn how `ANY(ARRAY[])` cuts the hidden planning tax and keeps your app fast at scale.
Debug PostgreSQL errors by capturing C-level stack traces for specific internal functions.
SQL is fun and not at all boring. The latest article by Markus Winand on Order by Has Come a Long Way sent me on quite a journey. First, set up a table called nums with one integer column and four rows: CREATE TABLE nums (a int); INSERT…
PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are out as of May 14, 2026. The release fixes eleven security issues and more than sixty bugs. That is not a typo. Eleven CVEs is the largest single-release security batch I can remember, and…
PostgreSQL 19 brings back MERGE PARTITIONS and SPLIT PARTITION—but simpler and safer than the first attempt.
When a partitioning change to our petabyte-scale ClickHouse cluster caused critical billing jobs to stall, standard metrics showed no obvious errors. This post explores how we identified severe lock contention in ClickHouse's query planner…
Yesterday, we had our first meetup at our new venue, which we hope will become our permanent home: the Chicago Innovations Center at 1 W. Monroe. We had the pleasure of having Elizabeth Christensen from Snowflake, who delivered a talk…
After a year and one million messages, Elastic's Field Technology team shares five lessons from building production AI agents: why logs matter most, how retrieval thresholds shape quality, and what high token counts actually signal.
It's that time again. The upcoming Postgres v18.4 release (along with minor releases for all Major versions) has dropped some serious hints in the git logs, and it's bringing a significant payload of CVE tagged patches. As a seasoned…
I'm excited to announce release 1.0 of pg_statviz, the minimalist extension and utility pair for time series analysis and visualization of PostgreSQL internal statistics. This is a major release that introduces a new optional capability:…
A step-by-step guide to migrating a PostgreSQL 17 cluster managed by Crunchy PGO v6 to PostgreSQL 18 under CloudNativePG. Two paths are covered: a fully declarative offline migration using CloudNativePG’s built-in pg_dump import, and an…
PostgreSQL's complicated relationship with the Linux page cache spawns four GUCs to manage writeback—and backend_flush_after is the conservative one.
