Postgres
The index that did nothing: reading an EXPLAIN plan line by line
We added an index to fix a 1.2 second query and the plan did not change. Here is how EXPLAIN ANALYZE told us why, and the partial index that worked.
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Latest posts
Green Build Gazette is a group engineering blog about Postgres, Node, Go, testing and reliability, written by four developers who run production.
Go
A retry helper with full jitter, in about 40 lines of Go
Exponential backoff without jitter turns one outage into synchronized waves of retries. Here is a small Go helper that gets backoff, jitter and cancellation right.
Reliability
Idempotency keys for webhooks: the ten lines that stop double charges
Webhook providers deliver at least once, so your handler will see duplicates. A unique key and one transaction in Postgres make that harmless.