How do you investigate long running queries in SQL?

How do you investigate long running queries in SQL?

How to find Longest running queries in SQL Server

1. SELECT DISTINCT TOP 20.
2. est.TEXT AS QUERY ,
3. Db_name(dbid),
4. eqs.execution_count AS EXEC_CNT,
5. eqs.max_elapsed_time AS MAX_ELAPSED_TIME,
6. ISNULL (eqs.total_elapsed_time / NULLIF (eqs.execution_count,0), 0) AS AVG_ELAPSED_TIME,
7. eqs.creation_time AS CREATION_TIME,

How do you troubleshoot long running queries?

Troubleshoot Slow-Running Queries In SQL Server

1. Using SQL Server Profiler. SQL Server Profiler is a separate application that lets you view the queries being run on the SQL Server database engine in real time as they complete.
2. Using Extended Events.
3. Find the Problem.
4. Over Executing NonClustered Indexes.
5. Scans into Seeks.

How do I optimize a long running query in SQL Server?

Supercharge Your SQL Queries for Production Databases

1. Define business requirements first.
2. SELECT fields instead of using SELECT *
3. Avoid SELECT DISTINCT.
4. Create joins with INNER JOIN (not WHERE)
5. Use WHERE instead of HAVING to define filters.
6. Use wildcards at the end of a phrase only.
7. Use LIMIT to sample query results.

How to notification on long running query in SQL Server?

Create a new alert and select type “SQL Server performance condition alert” For long running queries, choose Object “MSSQL$InstanceName:Transactions” and Counter: Longest Transaction Running Time. Configure the values, and the alert notification options, and you’re good to go.

How to set performance condition alert in SQL Server?

Set the Type to “SQL Server performance condition alert”. Select Transactions as the Object and set the Counter to Longest Transaction Running Time. Set Alert to fire if the counter rises above to 15 secs. The value of your environment will dictact where you set this value.

Which is an example of a long running query?

This is example of long running queries of database within email alert, we already had example how you can use sp_send_dbmail stored procedure from msdb database to send backup size email daily, and how to send missing indexes report via email. This is just another use case of sp_send_dbmail stored procedure.

How to set up SQL Server agent alerts?

To have more proactive way of monitoring long running transactions, we can use SQL Server Agent alerts. Here is a step by step procedure to set up these alerts. Firts, create a new alert, as shown below.