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This section lists basic limits and throttling thresholds in Azure Machine Learning.
Important
Azure Machine Learning doesn't store or process your data outside of the region where you deploy.
Workspaces
| Limit | Value |
|---|---|
| Workspace name | 2-32 characters |
Experiments
| Limit | Value |
|---|---|
| Name | 256 characters |
| Description | 5,000 characters |
| Number of tags | 50 |
| Length of tag key | 250 characters |
| Length of tag value | 1000 characters |
| Artifact location | 1024 characters |
Runs
| Limit | Value |
|---|---|
| Runs per workspace | 10 million |
| RunId/ParentRunId | 256 characters |
| DataContainerId | 261 characters |
| DisplayName | 256 characters |
| Description | 5,000 characters |
| Number of properties | 50 |
| Length of property key | 100 characters |
| Length of property value | 1,000 characters |
| Number of tags | 50 |
| Length of tag key | 100 |
| Length of tag value | 1,000 characters |
| CancelUri / CompleteUri / DiagnosticsUri | 1,000 characters |
| Error message length | 3,000 characters |
| Warning message length | 300 characters |
| Number of input datasets | 200 |
| Number of output datasets | 20 |
Custom environments
| Limit | Value |
|---|---|
| Number of files in Docker build context | 100 |
| Total files size in Docker build context | 1 MB |
Metrics
| Limit | Value |
|---|---|
| Metric names per run | 50 |
| Metric rows per metric name | 1 million |
| Columns per metric row | 15 |
| Metric column name length | 255 characters |
| Metric column value length | 255 characters |
| Metric rows per batch uploaded | 250 |
Note
If you are hitting the limit of metric names per run because you are formatting variables into the metric name, consider instead to use a row metric where one column is the variable value and the second column is the metric value.
Artifacts
| Limit | Value |
|---|---|
| Number of artifacts per run | 10 million |
| Max length of artifact path | 5,000 characters |
Models
| Limit | Value |
|---|---|
| Number of models per workspace | 5 million model containers/versions (including previously deleted models) |
| Number of artifacts per model version | 1,500 artifacts (files) |
Limit increases
Some limits can be increased for individual workspaces. To learn how to increase these limits, see "Manage and increase quotas for resources"
Next steps
- Learn how increase resource quotas in "Manage and increase quotas for resources".