Supermetrics Support Forum
What is a 503 error?
This error might happen when handling a certain number of concurrent requests. Each datasources have their own limits on API requests per account per period of time. As a result, when you create new or refresh queries and when the limit of the concurrent requests is reached, you might run into this error.
Note that a single Supermetrics query execution can result in many requests to the data source API, depending on the selected metrics and dimensions.
- Supermetrics Team
There doesn't seem to be any consistency as to when these errors appear. I have many different queries which run a different times of the day and also some of which are more complicated than others, yet I am getting this 503 error message on some relatively simple queries.
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