Log APIs taking way to long to return data

In the functions portal Monitor tab, pulling log data for a simple function that has had less than 10 execution is taking around 8 to 10 seconds to load.

I’ve verified that the issue isn’t the portal itself, but the actual log API itself on the SCM endpoint, e.g.:

https://<mysite>.scm.azurewebsites.net/azurejobs/api/functions/definitions?host=<mysite>&limit=11

This query is taking 8 to 10 seconds. Since this is only issuing a few table queries, it should be able to return in under a second. We need to find out where we’re spending the time.

I even went in and deleted my old v1 log table, as well as the one previous month table, so I now only have a single log table AzureWebJobsHostLogs201611, in addition to AzureWebJobsHostLogscommon.

[MikeStall]

The slowdown is here: https://github.com/Azure/azure-webjobs-sdk/blob/dev/src/Dashboard/ApiControllers/FunctionsController.cs#L523 After getting the function definitions, we do a fan out to get stats on each definition. So it slows down with the number of definitions.

[MikeStall]

1. We’ll add a new flag to /definitions to suppress the fan out.
2. Portal can pass the flag and use the existing “api/functions/invocations/{functionId}/timeline” to get those stats.

Portal changes are tracked via: https://github.com/projectkudu/AzureFunctionsPortal/issues/844