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Brian Martin discusses the real-world performance costs of metrics libraries and shares strategies for low-overhead, "fearless" instrumentation. Drawing from his work at IOP Systems, he explores atomic primitives, per-CPU sharding,…
log_replication_commands is log_statement = all for walsenders, with the one difference that you should turn it on. A replication connection (replication=1 for physical, replication=database for logical) speaks a small language of its own:…
When dividing by zero, Postgres fails and declares you ran an illegal operation. Cast 'abc' to an integer, and get an error. Divide by NULL and the query still runs. NULL isn't even a value. It is a marker for “unknown.” When using NULL,…
Note: I am presenting a tutorial for those who want to learn SQL at this year's Texas Linuxfest (https://pretalx.com/txlf2026/talk/DQ3XW7/) on November 6th. This is a great opportunity at a fantastic community event and I encourage you to…