This section gives an overview over important resource limits that help ensure the health and security of the Mender Server.
The frequency with which a Device checks for updates.
Default for Mender Client: 1800 seconds (30 minutes)
Default for Mender MCU Client: 86400 seconds (1 day)
This is a Client side configuration, see Mender Client configuration, and Mender MCU Client configuration.
Warning: Using shorter than default intervals with hosted Mender is considered excessive use and may trigger rate limiting, unless it is 10 devices or less for trial/testing or otherwise agreed upon in advance.
The frequency a Device can update its current inventory to the Mender Server.
Default for Mender Client: 28800 seconds (8 hours)
Default for Mender MCU Client: 1209600 seconds (14 days)
This is a Client side configuration, see Mender Client configuration, and Mender MCU Client configuration.
Warning: Using shorter than default intervals with hosted Mender is considered excessive use and may trigger rate limiting, unless it is 10 devices or less for trial/testing or otherwise agreed upon in advance.
The maximum size of pre-built Mender Artifacts that can be uploaded to the Mender Server.
Default: 10 GiB
Override with the Mender Server environment variable: DEPLOYMENTS_STORAGE_MAX_IMAGE_SIZE
The maximum size of single-file type Artifacts generated by the Mender Server with the Generate Artifact endpoint.
Default: 256 MiB
Override with the Mender Server environment variable: DEPLOYMENTS_STORAGE_MAX_GENERATE_DATA_SIZE
The maximum size of a single Device inventory on the Mender Server. This limit is based on the maximum size of a BSON document in MongoDB, but there are other limits that can limit this further.
Default: 10 MiB
Overriding this limit is not possible
The maximum length of Release names when creating Releases on the Mender Server.
Default: 256 characters
Overriding this limit is not possible
The maximum length of keys and values in Mender Configure Device attributes.
Default: 4096 characters
Overriding this limit is not possible
The maximum number of active and pending deployments per tenant.
Default: No limit
Override with the Mender Server environment variable: DEPLOYMENTS_LIMIT_MAX_ACTIVE_DEPLOYMENTS
Warning: This limit is set to 800 active deployments per tenant on hosted Mender.
The maximum number of tags that can be defined per Device inventory.
Default: 20
Override with the Mender Server environment variable: INVENTORY_LIMIT_TAGS
The maximum uncompressed size of the root file system in Mender Artifacts that you can use to trigger server-side binary delta generation.
Default: 5 GiB
Override with the Mender Server environment variable: DEPLOYMENTS_SERVER_SIDE_DELTA_GENERATION_MAX_ARTIFACT_SIZE_MB
Note that the environment variable is represented in MiB, and its default value is 5120.
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