Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding.

Vijay Kumar 2,031 Reputation points

Hi Team,

We are getting below error while running query in SSMS:
Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding.

Normally it shouldm't take more than 2 mins. But from yesterday onwards, the query failing with above error.
It is SQL Server 2016 With SP2 (CU17)

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Accepted answer
  1. Erland Sommarskog 105.9K Reputation points MVP

    By default, SSMS waits forever for a query to complete. If you get this error, this is because you have set a query timeout under Tools->Options->Query Execution->SQL Server->General->Execution time-out. You can also change it for the current window, by right-clicking and selecting Query Options from the bottom of the context menu. Set the time-out to 0 to wait forever.

    As for why the query is running slower than yesterday... Well, have you investigated if it may be due to blocking? Else it is not unheard of that the execution plan changes, because of updated statistics or some other reason. And sometimes when the optimizer takes a wrong bet, the query can be a lot slower.

    Do you have Query Store enabled on the database?

    1 person found this answer helpful.

2 additional answers

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  1. AmeliaGu-MSFT 13,971 Reputation points Microsoft Vendor

    Hi VijayKumar768,

    In addition, please try to clear the statistics to make sure the database's statistics and/or query plan cache are correct:

    exec sp_updatestats

    And please try to track the query using SQL Server Profiler to see if can get some clues.

    Best Regards,

    1 person found this answer helpful.

  2. Andrew 6 Reputation points

    I had the same problem - after regularly running large queries, suddenly getting a timeout on some - but not all? - queries.

    I tried Tools->Options->Query Execution->SQL Server->General->Execution time-out - changed the value there from 15secs to 600secs - but I had to update the setting in Query>Query Options to fix it properly.

    Was it a SSMS update that changed the settings? It's been working fine up until last Thursday (29 July)

    1 person found this answer helpful.