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A single Terraform apply takes four hours and keeps hitting cloud API rate limits. What is actually broken, and what do you fix first?

Four-hour applies with throttling errors share one root cause more often than not. Diagnose which calls burn the quota, split the state along dependency seams, and touch the parallelism flag last, not first.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.

Four-hour applies with throttling errors share one root cause more often than not. Diagnose which calls burn the quota, split the state along dependency seams, and touch the parallelism flag last, not first.

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