Etcd · Rate Limits

Etcd Rate Limits

etcd is self-hosted open-source software, so there is no upstream "service" rate limit. etcd does enforce its own resource caps (max-request-bytes, quota-backend-bytes, max-concurrent-streams) that act as throttling/safety mechanisms; the actual request throughput is limited by hardware (disk fsync latency dominates) and by the Raft protocol's serialization of writes. The values below describe configurable etcd guardrails rather than a vendor quota.

Etcd Rate Limits is the machine-readable rate-limit profile for Etcd on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 4 rate-limit definitions, measuring bytes_per_request, bytes_storage, concurrent_streams, and requests_per_second.

The profile also includes 3 backoff/retry policies defined and response codes documented for resourceExhausted and unavailable.

Tagged areas include Rate Limiting, Distributed Systems, Key-Value Store, and Open Source.

4 Limits
Rate LimitingDistributed SystemsKey-Value StoreOpen Source

Limits

max-request-bytes server
bytes_per_request
1572864
Default 1.5 MiB per request; configurable.
quota-backend-bytes cluster
bytes_storage
2147483648
Default 2 GiB DB quota; raise to 8 GiB max safe; cluster goes read-only when exceeded.
max-concurrent-streams server
concurrent_streams
4294967295
gRPC max-concurrent-streams; effectively unbounded by default.
Operator-imposed throttle client
requests_per_second
operator-defined via client-side rate limiting or proxy

Policies

Linearizable reads
Linearizable reads require quorum; degrade to serializable reads to lower load when consistency tolerates it.
Compaction and defragmentation
Schedule periodic compaction of revisions and defrag to keep DB size under quota-backend-bytes.
Backoff
On RESOURCE_EXHAUSTED or UNAVAILABLE, clients should apply exponential backoff with jitter and avoid retry storms.

Sources

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

MCP server

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https://apis.io/mcp

Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/etcd-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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