Why your Postgres index is not being used
Four reasons the planner walks straight past the index you added, and how to check which one it is.
Archive
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Newest first. Code samples are free to copy and adapt.
Retries with jitter: a ten-line fix for a self-inflicted outage
Every client retried after exactly one second. So the service fell over again, exactly one second later.
Reading a flame graph for the first time
Width is time. Height is the call stack. Colour usually means nothing.
Feature flags are debt. Pay it back.
We had 140 flags. Nobody knew what a third of them did.
What I check before merging a migration
A short checklist that has saved me from at least two outages.
