Questions tagged [query-store]
Introduced in SQL Server 2016, the Query Store feature collects execution plans and runtime performance metrics for analysis, troubleshooting, and testing purposes.
6
votes
1answer
78 views
Understanding Plan Choice When Query Store Doesn't Respect Forced Plan
I'm trying to figure out a situation that I encountered last week where, in an attempt to temporarily fix a plan regression during an incident, I forced an execution plan using Query Store, but found ...
5
votes
2answers
91 views
Why is Query Store missing details?
This is slightly complex to explain, but very easy to reproduce.
Short version:
For about 10%-30% queries (by count) significant amounts of Query Store data is not available. I have looked at SQL ...
5
votes
1answer
45 views
QueryStore plan forcing limitations
I have a DELETE statement running against a table with a full-text indexed column, a handful of foreign keys with cascade enabled. It looks like this:
DELETE FROM dbo.STUDENTS WHERE STUDENTID=@...
0
votes
1answer
29 views
How to search Query Store for queries with multiple plans?
There are a number of blog posts about why a single query with multiple plans is bad. But they mostly address when you find them, not how to find them.
Query Store does not offer a report, that ...
11
votes
1answer
116 views
What is an “unmentionable word” to SQL?
What is an "unmentionable word" to SQL?
I am reading sys.query_store_query_text (Transact-SQL) and I see the following, so I google {SQL "unmentionable" word}
has_restricted_text
bit
Query ...
0
votes
0answers
15 views
Azure SQL Data Warehouse will always return zero (0)
I am studying Query Store, and while reading sys.query_store_runtime_stats I found these
Average CPU time for the query plan within the aggregation interval (reported in microseconds).
Note: ...
4
votes
2answers
106 views
What is 'Log Memory' in Query Store 2017
In SQL 2017 there is a new execution metric, 'Log memory' other than that it was added in 2017 I am not finding anything about it.
Execution metric: (SQL 2017)
CPU time, Duration, Execution Count, ...
5
votes
2answers
157 views
How can I export Query Store data?
I have Query Store (QS) running on a SQL 2017 instance. Currently at RTM, with RTM CU13 currently in test, to be applied on prod in next month's patch window.
While most queries and reports return ...
1
vote
0answers
40 views
Query Store- force plan not working as expected
Have similar issue as was ask in other question.
In my case none of cases from microsoft docs seems to apply
Can something else be the reason? Schema changes not happening, but after index ...
3
votes
1answer
74 views
Should the Query Store be enabled on all databases?
We are using SQL Server 2016 Standard Edition (SP2-CU2). We have a few servers hosting each between a few dozens to hundreds of databases. We have never enabled Query Store on our databases.
I know ...
3
votes
1answer
116 views
How to find inputs that caused different query plans in Query Store
Query store shows that a completely parameterized query has multiple query plans:
How can I find the input that is causing such long response times?
Why would the same parameterized query end up ...
5
votes
0answers
81 views
SQL Server 2016 & 2017 Force Plan failing with reason 8695
I'm trying to force a plan using query store but it keeps failing with reason 8695 according to data in SYS.QUERY_STORE_PLAN the last_force_failure_reason_desc is 'General_Failure'.
Does anyone know ...
1
vote
1answer
83 views
Don't RESEED tables on Query Store Clean
We are using Query Store. And now we have solved one problem with it by cleaning the Query Store every night. And when you clean the Query Store, the Query Store tables are being RESEEDed :-(
Do you ...
1
vote
1answer
185 views
Visual Studio SSDT Ignore Query Store Options in Publish Profile
Is there any way in Visual Studio SSDT Publish Profile, to Totally Ignore Query Store Options Completely?
It keeps asking us to Rerun publish code below. I go to Database advanced settings, and turn ...
3
votes
1answer
143 views
How to find when Query Store flushes stale query data? Extended Events not working
I searched online far and wide and didn't see anyone else posting about this so I thought I would. I am trying to audit when the query store does its cleanup and is purged from the query store.
There ...
8
votes
1answer
292 views
Blocking caused by Query Store. Unable to clear or disable
I recently updated our 2016 SQL Server to SP2 and the most recent CU (KB4458621) released in August 2018. Just in the last day or so, I noticed that I have some blocking going on. I can't kill the ...
1
vote
1answer
72 views
Monitor SQL Server stored procedure latency
What is the best way to capture SQL Server stored procedure latency in SQL Server 2016?
Plan is to create a SSRS report and send it to management. We also enabled query store.
Thanks much
11
votes
1answer
217 views
Why doesn't join elimination work with sys.query_store_plan?
The following is a simplification of a performance problem encountered with the Query Store:
CREATE TABLE #tears
(
plan_id bigint NOT NULL
);
INSERT #tears (plan_id)
VALUES (1);
SELECT
T....
2
votes
1answer
93 views
How to search Query Store for a specific word or command in a query?
I have an Enterprise Edition of SQL 2016 SP1, that has a database with Query Store active.
I want to search for a specific word or command in the saved queries. I have googled around and not seen ...
2
votes
0answers
44 views
Query store works in dev, but not production in Amazon RDS
I'm having an issue getting query store to collect and record data on our production workload, however, it works as expected on our non-production instances (development and staging).
The only ...
4
votes
1answer
656 views
Unbelievably slow and unusable Query Store
I'm begining with Query Store and it's with problems :-( No report of Top Resource Consuming Queries is ever generated. It's just keep saying "Waiting" for hours and hours. Query on the background (...
4
votes
1answer
100 views
Where is this Query Coming From?
I have enabled Query Store on SQL 2017, and I'm seeing at query that's occurring frequently doing a SELECT * on a specific table.
I would like to narrow down where this request is coming from and ...
0
votes
1answer
57 views
Auto cleanup querystore not working
We have a SQL Server 2016 SP1 CU7 Enterprise server where we enabled the query store on a database. This is a highly used database.The Max Size has been set to 200MB and Stale Query Threshold is 1 day....
10
votes
2answers
363 views
Never ending Query Store search
I'll say from the beginning that my question/problem looks similar to this previous one, but since I'm not sure if the cause or the starting info is the same, I decided to post my question with some ...
2
votes
1answer
182 views
SQL Server Query Store on isolated volume
Is there a way to isolate Query Store data to a separate volume? I have a thousand or so databases that we’ve gotten pretty good at predicting growth for. I’m unsure of how much storage Query Store ...
1
vote
1answer
72 views
Multiple plans (with/without missing index) in query store for same query
I'm a newbie regarding the query store and have some problems understanding what I'm seeing.
We have a third-party application (running on SQL Server 2016 Enterprise SP1 CU7) that uses the query-hints ...
4
votes
1answer
71 views
Query Store Settings
I'm interested in the overall CPU utilization for a database in a time span. I see how to get that, but I'm concerned about the query store retention settings.
I don't need detailed info about each ...
2
votes
1answer
175 views
Query Store “Overall Resource Consumption” details
I want to know how much total CPU a database has consumed for a given date span, for all queries.
I can see it in SSMS (under Query Store / Overall Resource Consumption), but how can I query for ...
4
votes
1answer
577 views
Database corruption: QueryStore internal table
This morning, the following email alert was received:
DATE/TIME: 2/28/2018 9:26:42 AM
DESCRIPTION: Attempt to fetch logical page (1:3948712) in database 9
failed. It belongs to ...
6
votes
1answer
174 views
What to consider when setting flush_interval_seconds in SQL Query Store?
Most of the settings for Query Store are fairlying straight forward. But as best as I can tell the one most likely to cause performance issues (waits) and with the least clear documentation is ...
4
votes
1answer
200 views
Can I have 'Query Store' automatically on when I create new databases?
Query Store is available in SQL Server 2016+ and on Azure SQL DB it is on by default. With an on-premises SQL Server, it has to be started on each database individually.
Is there a way I can have ...
9
votes
2answers
370 views
What benefit is there from enabling Query Store on msdb?
Of the SQL system database (master, model, msdb, tempdb) query store can only be used on msdb. I looked and don't find any documentation about query store on msdb.
While you can't see it in the GUI, ...
4
votes
2answers
2k views
Enable query store for all databases
I want to start using Query Store with suggested setting by Erin Stellato.
USE [master]
GO
ALTER DATABASE DatabaseName SET QUERY_STORE = ON
GO
ALTER DATABASE DatabaseName SET QUERY_STORE (...
1
vote
1answer
597 views
Query Store - What are the Security permissions needed to view reports?
Query store is enabled on 2 of our production databases but I no longer have access to see the Query Store node under the database since my SA privileges were revoked (I had them temporarily for a new ...
2
votes
0answers
287 views
Query store is slow/unresponsive
When opening the query store for the first time on any give day, it will take a VERY long time to output data.
I took a SQL script from this redgate blog article :
Top 10 most expensive queries ...
10
votes
4answers
2k views
SQL Server Query Store - What is considered an 'ad-hoc' query?
I've been doing a deep dive into the SQL Server Query Store and I often see references to 'ad-hoc' queries. However, I haven't seen what the Query Store determines an ad-hoc query to be. I've seen ...
0
votes
1answer
165 views
A Query in the Query Store shows high Logical Reads
When I look at the Query Store reports for Top Resource Consuming Queries,
there is one query that skews the report so much that I can barely see the next query because this one is so high.
Highest ...
11
votes
1answer
789 views
Query Store Force Plan feature doesn't work
Query Store Force plan feature doesn't appear to be enforcing the plan.
I'm aware of Query Store - Forced Doesn’t Always Mean Forced; however, my plan may not change insignificantly, but query ...
2
votes
0answers
282 views
Query Store on Amazon RDS
I'm trying to use Query Store on SQL Server on Amazon RDS, and not having any luck. The query store works for a few hours after each failover, but then stops working. For example, our last manual ...
14
votes
1answer
4k views
SQL Server 2016 Bad Query Plan locks up DB once a week
Once a week, for the past 5 weeks, around the same time of day (early morning, may be based on user activity when people are starting to use it), SQL Server 2016 (AWS RDS, mirrored) starts timing out ...
7
votes
1answer
679 views
Does SQL Server Query Store capture parameter values?
The new Query Store introduced in SQL Server 2016 is great. It's a nice replacement for much of what I used to do with the older Profiler tool. However, I haven't found a way to capture parameter ...
2
votes
1answer
461 views
How to interpret Azure SQL QueryStore Query Performance Insight
The Azure SQL QueryStore is supposed to give you insight into what is causing high DTU usage, but I can not figure out what is going on.
In some cases, I get good data out of it, and I can pinpoint to ...
1
vote
1answer
460 views
Delete from table with(snapshot)
I was trying to learn querystore. When going through few queries involved in query store one of the query is below
DELETE TOP (1000000)
FROM [sys].[memory_optimized_history_table_1179151246]
WITH (...
1
vote
1answer
131 views
How can you view the Query Store settings for a database?
I see that you can use notion like the following to set the query store configuration:
ALTER DATABASE <database name>
SET QUERY_STORE (SIZE_BASED_CLEANUP_MODE = AUTO);
But how can I ...
3
votes
1answer
830 views
How to list all forced query plans and cancel one
Using SSMS 2016 Query Store I forced a few weeks ago a specific query to use a specific plan. Now every now and then I have the error:
Query processor could not produce a query plan because of the ...
6
votes
2answers
2k views
Indexes and Statistics on Temp tables
I've just upgraded our Data warehouse to SQL 2016. I'm seeing some really interesting graphs in the Query Store (I love this feature!). Below is the weirdest example i've seen.
22 plans for the same ...
4
votes
1answer
3k views
Problems caused by SQL Server 2016 Query Store
I have been testing SQL Server 2016 (Standard) on an Azure VM and have encountered a problem.
In my SQL logs I am seeing SQLExceptions and eventid 1001 and this is happening every 15 minutes.
2016-...
3
votes
1answer
1k views
How to enable query store on the SSMS object browser with Sql Azure?
I am following this guide: Monitoring Performance By Using the Query Store
I am using SSMS 2016 CTP3.2 and Sql Azure V12
I have enabled the query store on the database properties.
I can use the ...
