There are maximum limits for concurrent export requests. Tenable.io applies these limits on concurrent exports to ensure that all customers experience the same level of service. You can have a maximum of two or three active concurrent export requests per Tenable.io customer instance or container depending on which endpoint you are using.
If you submit an API request after the concurrency limit is reached, Tenable.io returns an HTTP response message with a 429 (Too Many Requests) status code. The response also includes a retry-after header element that specifies the number of seconds to wait before retrying.
Example Response Header
connection:keep-alive
content-length:580
content-type:text/html
date:Wed, 24 Oct 2018 17:13:43 GMT
retry-after:30
server:tenable.io
strict-transport-security:max-age=63072000; includeSubDomains
x-content-type-options:nosniff
x-gateway-site-id:nginx-router-b-eng-us-east-1.dcld
x-path-handler:tenable-io-plugins-plugin
Concurrency Limits
This table below outlines the concurrency limits for specific Tenable.io export endpoints.
| Limit | Affected Endpoints |
|---|---|
| Two concurrent vulnerability exports per container. Tenable.io also prevents duplicate exports from running concurrently. For example, export requests with the same filters. | |
| Two concurrent asset exports per container. Tenable.io also prevents duplicate exports from running concurrently. For example, export requests with the same filters. | |
| Two concurrent exports per container. | |
| Three concurrent requests per Tenable.io customer instance.Note: This limit is subject to change. |
Updated 6 months ago