How do I find Dedicated SQL pool inactive time

Question

I would like to know how to find Dedicated SQL pool inactive time.
To reduce the cost, I would like to trigger a pause after certain time of inactive period on the DB pool, or there are no queries to execute.

I refer to the following Q, but that explains explicitly invoking APIs.
https://learn.microsoft.com/en-us/answers/questions/692639/pause-synapse-pool-after-a-period-of-inactivity.html

Answer 1

Hi @Sasikanth Prabha ,
Welcome to Microsoft Q&A platform and thanks for posting your query here.
As I understand your requirement, it seems you want to know if there is any workaround to find out the period of inactivity in dedicated sql pool so as to make sure that there is no active queries running and we are good to pause the sql pool.

This can be achieved by running monitoring queries in the SQL pool using script activity or stored procedure activity.

Use the following query in Script activity :

select count(*) as queriesRunning from sys.dm_pdw_exec_requests WHERE status='Running' and session_id <> session_id();

SELECT min(DATEDIFF (mi, end_compile_time, getutcdate())) as minutesPassed FROM sys.dm_pdw_exec_requests WHERE session_id <> session_id()

Use the below expression in If condition block:
@and(equals(activity('Script1').output.resultSets[0].rows[0].queriesRunning,0),greaterOrEquals(activity('Script1').output.resultSets[1].rows[0].minutesPassed,2))

Case 1: When query is running :

equals(activity('Script1').output.resultSets[0].rows[0].queriesRunning,0 will result in false

Case 2: When there is no active query but minutes passed is < 2:

Case 3: When there is no active query and minutes passed is >=2:

Hope this will help. Please let us know if any further queries.

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Answer 2

Hello @Sasikanth Prabha

To pause or resume the Synapse pool you will have to invoke the APIs as mentioned in the documentation

You will have to create the pipelines to pause the Synapse pool