Quick answer
Redis documents maximum connected clients as 10,000 default. Redis lowers the effective value when the operating-system file-descriptor limit is insufficient.
Verified Aug 22, 2026Official source
Current limits
| Constraint | Current value | Scope | Verified source |
|---|---|---|---|
| maximum connected clientsRedis lowers the effective value when the operating-system file-descriptor limit is insufficient. | 10,000 default | Redis 2.6+ | RedisAug 22, 2026 |
Why does this limit matter?
Setting maxclients higher does not help when the process cannot open the required descriptors plus its reserved 32.
This value is scoped to Redis 2.6+; a different plan, runtime, model, endpoint, region, or account can produce a different effective constraint.
What should you check?
- Read CONFIG GET maxclients, INFO clients, and the process soft file-descriptor limit.
- Confirm the exact plan, model, runtime, endpoint, region, and account that serve the failing workload.
- Record the observed value, response headers or configuration, timestamp, and source without logging secrets.
Important caveats
- Managed Redis providers can impose plan-specific connection limits.
- Treat the official source and live account configuration as authoritative if they differ from this verified snapshot.
HyperObserve reports the documented platform constraint. Your application, SDK, gateway, provider, region, or account can impose a lower effective limit.
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