Limits

The following limits apply to Hyperdrive configuration, connections, and queries made to your configured origin databases.

Feature	Limit
Maximum configured databases	25 per account
Initial connection timeout	15 seconds
Idle connection timeout	10 minutes
Maximum cached query response size	50 MB
Maximum query (statement) duration	60 seconds
Maximum username length	63 characters (bytes) 1
Maximum database name length	63 characters (bytes) 1
Maximum potential origin database connections	approx. ~100 connections 2

Note

Hyperdrive does not have a hard limit on the number of concurrent client connections made from your Workers.

As many hosted databases have limits on the number of unique connections they can manage, Hyperdrive attempts to keep number of concurrent pooled connections to your origin database lower.

Note

You can request adjustments to limits that conflict with your project goals by contacting Cloudflare. Not all limits can be increased. To request an increase, submit a Limit Increase Request ↗ and we will contact you with next steps.

Footnotes

1. This is a limit enforced by PostgreSQL. Some database providers may enforce smaller limits. ↩ ↩²

2. Hyperdrive is a distributed system, so it is possible for a client to be unable to reach an existing pool. In this scenario, a new pool will be established, with its own allocation of connections. This favors availability over strictly enforcing limits, but does mean that it is possible in edge cases to overshoot the normal connection limit. ↩