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Monitoring Open Connections in the Serverless SQL Pool

Liliam Leme has a pair of queries for us:

Consider a scenario where you are trying to monitor the connections from other applications to serverless SQL. I hit this need while trying to understand how many connections opened I had coming from an application. Had I hit some kind of limitation on serverless SQL or not. Spoiler: There is no limit for connections on Synapse serverless SQL  as you would find with a dedicated SQL pool (formerly SQL DW).

Alternatively, the limit to the number of serverless SQL pool connections is how much cash you have in your bank account…though given that it’s $5 per TB processed, if you’re writing good queries, that’s a lot of queries and connections.

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