Backend & systems·Resilience and failure handling
you cap retries at a small fraction of total traffic so a struggling dependency does not get three times the load it was already failing under.
Retry budget
A global limit on retry volume, expressed as a ratio of retries to requests. It exists because per-call retry policies compose disastrously: three layers each retrying three times is twenty-seven calls. Budgets keep retries useful for isolated failures and prevent them from amplifying a systemic one.