QTip: Getting timeouts and exceptions using Azure SQL DB Query Store
Requirements: Azure SQL Database SQL Server Management Studio (SSMS) Tables testcodes and testinvoice used for this demo 1-Configure Query Store to collect data and save as soon as possible to be able to review it * Data flush interval is the time to send information to disk ** Statistics collection interval is the time range to collect data , query store is not collecting one record by execution is collecting statistics of each execution and you can get max, min, avg but not excecution by excecution *** Query store capture mode ALL will collect information of all executions query store will not make any kind of filter 2-Create table testcodes CREATE TABLE [dbo].[testcodes]( [Code] [char](5) NULL, [Description] [nchar](10) NULL ) ON [PRIMARY] GO 3-Create table testinvoice CREATE TABLE [dbo].[testinvoice]( [code] [char](5) NULL, [pieces] [int] NULL ) ON [PRIMARY] GO 4-Add some codes to be used 5-Add some records to invoice Exception ... 6-Run query to get information from invoices and get description from codes select *,description=(select testcodes.Code from testcodes where testcodes.code=invoice.code) from testinvoice invoice Is possible to see execution without error 7-Now add in codes a second code BBB to force exception 8-Run query from point 6 again Result is an exception 9-Run query to see queries with exceptions or timeouts starting 2 days ago (declare @datestart as datetime = dateadd(D,-2,getdate());) declare @datestart as datetime = dateadd(D,-2,getdate()); declare @datefinish as datetime = getdate(); /* if you want to set to specific time */ --set @datestart = '2025-04-09 00:00:00'; --set @datefinish = '2025-04-09 23:59:59'; select rs.last_execution_time, rs.execution_type_desc, qt.query_sql_text, q.query_id, CONVERT(VARCHAR(1000), q.query_hash, 1) as strqueryhash, p.plan_id, rs.last_cpu_time, rs.last_duration, rs.count_executions, rs.last_rowcount, rs.last_logical_io_reads, rs.last_physical_io_reads, rs.last_query_max_used_memory, rs.last_tempdb_space_used, rs.last_dop, p.is_forced_plan, p.last_force_failure_reason, p.last_force_failure_reason_desc FROM sys.query_store_query_text AS qt JOIN sys.query_store_query AS q ON qt.query_text_id = q.query_text_id JOIN sys.query_store_plan AS p ON q.query_id = p.query_id JOIN sys.query_store_runtime_stats AS rs ON p.plan_id = rs.plan_id where rs.last_execution_time>= @datestart and rs.last_execution_time<=@datefinish and (rs.execution_type=3 or rs.execution_type=4) -- 3 timeout, 4 error --and qt.query_sql_text like '%actual%' --and q.query_hash=0x009C458D20394C37 --and p.plan_id=12 ORDER BY rs.last_execution_time DESC 10-In query there are some commented lines that you can use to add more filters or modify them To see all records comment line 20 declare @datestart as datetime = dateadd(D,-2,getdate()); declare @datefinish as datetime = getdate(); /* if you want to set to specific time */ --set @datestart = '2025-04-09 00:00:00'; --set @datefinish = '2025-04-09 23:59:59'; select rs.last_execution_time, rs.execution_type_desc, qt.query_sql_text, q.query_id, CONVERT(VARCHAR(1000), q.query_hash, 1) as strqueryhash, p.plan_id, rs.last_cpu_time, rs.last_duration, rs.count_executions, rs.last_rowcount, rs.last_logical_io_reads, rs.last_physical_io_reads, rs.last_query_max_used_memory, rs.last_tempdb_space_used, rs.last_dop, p.is_forced_plan, p.last_force_failure_reason, p.last_force_failure_reason_desc FROM sys.query_store_query_text AS qt JOIN sys.query_store_query AS q ON qt.query_text_id = q.query_text_id JOIN sys.query_store_plan AS p ON q.query_id = p.query_id JOIN sys.query_store_runtime_stats AS rs ON p.plan_id = rs.plan_id where rs.last_execution_time>= @datestart and rs.last_execution_time<=@datefinish --and (rs.execution_type=3 or rs.execution_type=4) -- 3 timeout, 4 error --and qt.query_sql_text like '%actual%' --and q.query_hash=0x009C458D20394C37 --and p.plan_id=12 ORDER BY rs.last_execution_time DESC Now you can see all records 11-Reproduce error several times within 1 minute to see value in execution count (number of executions inside of statistics collection interval) Timeout ... 12-Configure command timeout different to 0 for this demo use 10 (seconds) in parameters previous to connect Second option 12-Use query below that will run 1000 times and at some point will fail INSERT INTO [dbo].[testinvoice] SELECT * FROM [dbo].[testinvoice] GO 1000 13-Run query from point 9 to see data in query store Now you can reproduce and get data about all excecutions , exceptions and timeouts good luck!
Query Store transaction preventing restoring database
I have a database backup that was taken on SQL Server 2019 instance. While trying to restore it to a SQL Server 2025 instance, the files restored without issue, but it remained "In Recovery" for three days before I tried to take it to Emergency, Single User, and back online, though it still remained in recovery. I then took the backup to a SQL Server 2019 instance and was able to restore it and bring it online there. Though the logs on both servers had shown similar errors to these two. The Page and Log record Id were consistant. ```text Database ID 5, Page (1:47416) is marked RestorePending, which may indicate disk corruption. During undoing of logged operation in database (page(1:301040) if any), an error occurred at log record ID (15885:36832:180). ``` Doing some investigation has provided that there is a stuck transaction, and I was able to pin this down to Query Store. OPENTRAN (This spid was from the original server.): ```text ransaction information for database 'BrokenDatabase'. Oldest active transaction: SPID (server process ID): 26s UID (user ID) : -1 Name : DELETE LSN : (15885:19072:1) Start time : Mar 1 2025 7:27:58:633PM SID : 0x01 DBCC execution completed. If DBCC printed error messages, contact your system administrator. ``` I had the Top and bottom 50 of 938 transactions from fn_dblog, but since it contains data this community will not allow it. Makes it harder to get an answer without the data showing that query store is the issue, but to play by the rules you have give lackluster information, because the guidelines are even searching through code blocks, markdown, and tables. With Query Store in the Read_Write mode, I was unable to return anything from sys.query_store_plan and / or sys.query_store_runtime_stats, because they were locked by the ASYNC_LOAD of QDS. All that I have collected show that is internal to the Query Store. sys.internal_tables: | name | object_id | principal_id | schema_id | parent_object_id | type | type_desc | create_date | modify_date | is_ms_shipped | is_published | is_schema_published | internal_type | internal_type_desc | parent_id | parent_minor_id | lob_data_space_id | filestream_data_space_id | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | plan_persist_runtime_stats | 213575799 | NULL | 4 | 0 | IT | INTERNAL_TABLE | 2019-09-24 | 2019-12-28 | 0 | 0 | 0 | 243 | QUERY_DISK_STORE_RUNTIME_STATS | 0 | 0 | 0 | NULL | sys.dm_tran_active_transactions: | transaction_id | database_id | database_transaction_begin_time | database_transaction_type | database_transaction_state | database_transaction_status | database_transaction_status2 | database_transaction_log_record_count | database_transaction_replicate_record_count | database_transaction_log_bytes_used | database_transaction_log_bytes_reserved | database_transaction_log_bytes_used_system | database_transaction_log_bytes_reserved_system | database_transaction_begin_lsn | database_transaction_last_lsn | database_transaction_most_recent_savepoint_lsn | database_transaction_commit_lsn | database_transaction_last_rollback_lsn | database_transaction_next_undo_lsn | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | 255756374 | 5 | NULL | 1 | 4 | 524289 | 1 | 0 | 0 | 0 | 10677320 | 0 | 0 | 15885-00000-19072-00001 | 15885-00000-36952-00023 | NULL | NULL | NULL | 15885-00000-36832-00179 | Last Thursday, I was able to force the database to turn query store off, I tried after that setting it for Read_only and then clearing Query Store, but the clearing went into a lock for ASYNC_LOAD of QDS, after 6 hours of nothing happening and checking requests and seeing the lock, I ended that task. It was not actively doing anything just sleeping. My ultimate goal is to be able to get his database to the SQL Server 2025 instance and have it online. What can I do with the original backup or currently the online version of the database on the SQL Server 2019 instance to be able to make that happen?
