ArangoDB Server Foxx Options

Foxx startup

Introduced in: v3.6.10, v3.7.6

enable or disable the Foxx service propagation on startup--foxx.force-update-on-startup flag

if true, all Foxx services in all databases will be synchronized between multiple coordinators during the boot sequence. This ensures that all Foxx services are up-to-date when a coordinator reports itself as ready.

In case the option is set to false (i.e. no waiting), the coordinator will complete the boot sequence faster, and the Foxx services will be propagated lazily. Until the initialization procedure has completed for the local Foxx apps, any request to a Foxx app will be responded to with an HTTP 500 error and message

waiting for initialization of Foxx services in this database 

This can cause an unavailability window for Foxx services on coordinator startup for the initial requests to Foxx apps until the app propagation has completed.

When not using Foxx, this option should be set to false to benefit from a faster coordinator startup. Deployments relying on Foxx apps being available as soon as a coordinator is integrated or responding should set this option to true (which is the default value).

The option only has an effect for cluster setups. On single servers and in active failover mode, all Foxx apps will be available from the very beginning.

Note: ArangoDB 3.8 changes the default value to false for this option.

Foxx queues

enable or disable the Foxx queues feature--foxx.queues flag

If true, the Foxx queues will be available and jobs in the queues will be executed asynchronously.

The default is true. When set to false the queue manager will be disabled and any jobs are prevented from being processed, which may reduce CPU load a bit.

Foxx queues poll interval

poll interval for Foxx queues--foxx.queues-poll-interval value

The poll interval for the Foxx queues manager. The value is specified in seconds. Lower values will mean more immediate and more frequent Foxx queue job execution, but will make the queue thread wake up and query the queues more often. When set to a low value, the queue thread might cause CPU load.

The default is 1 second. If Foxx queues are not used much, then this value may be increased to make the queues thread wake up less.