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Rate Limiting Glossary

Explore 17 platform engineering definitions related to Rate Limiting.

Rate Limiting

Fixed window rate limiting

Counts requests in discrete, non-overlapping time buckets.

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Rate Limiting

Sliding window rate limiting

Maintains rolling count of requests over recent N seconds.

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Rate Limiting

Token bucket

Accumulates tokens at fixed rate; requests consume tokens.

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Rate Limiting

Leaky bucket

Processes requests at constant output rate, queueing excess.

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Rate Limiting

Burst limit

Maximum requests above steady-state rate in short period.

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Rate Limiting

Rate limit window

Time period over which request counts are measured.

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Rate Limiting

Global vs per-consumer rate limit

Global limit shared across all clients vs per-consumer independent counters.

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Rate Limiting

Jitter (retries)

Adds randomness to retry wait times to prevent synchronized retries.

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Rate Limiting

Exponential backoff

Retry wait times grow multiplicatively after each failure.

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Rate Limiting

Retry storm

Failure amplification where synchronized retries recreate overload.

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Rate Limiting

HTTP 429 Too Many Requests

Standard status code for rate limiting responses.

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Rate Limiting

RateLimit headers (IETF)

Standardized headers for communicating quota information.

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Rate Limiting

X-RateLimit headers

Legacy de facto standard for rate limit state communication.

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Rate Limiting

Retry-After header

Specifies how long client should wait before retrying.

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Rate Limiting

API throttling vs rate limiting

Rate limiting rejects excess; throttling delays to preserve availability.

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Rate Limiting

nginx limit_req

Nginx directive implementing leaky bucket rate limiting (token-bucket-like with nodelay).

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Rate Limiting

Kong rate-limiting plugin

Enforces request quotas on routes and services.

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