the query store and sql tuning · 2019-03-08 · the query store and sql tuning grant fritchey...

Grant Fritchey | www.ScaryDBA.com

www.ScaryDBA.com

The Query Store and SQL Tuning

Grant Fritchey – Red Gate Software


Goal

Understand the information and mechanisms behind the Query Store

Learn how to work with and maintain the Query Store

Discover new opportunities and mechanisms for dealing with query performance tuning issues

2


Get in touch

scarydba.com

[email protected]

@gfritchey

Grant Fritchey

Grant Fritchey | www.ScaryDBA.com 4


Query Store

7


Query Store

8

Plan Store

RuntimeStatistics

QueryOptimization

Process

Async

QueryExecution

Async


Query Store Data

9


Query Store Lives

10

SQL Server 2016

Azure SQL Database

2014?


You control…

11

Turn it on or Off

Time to flush to disk

Size of storage

Days in storage

Plans per query limit

Automatic cleanup

Capture Mode

Aggregation Interval Length


Qu

erie

s • Execution count

•Duration

•CPU

•Compile

Exe

cuti

on

Pla

ns • Estimated

Plan

•More than one per query


Monitoring

13

Extended Events

Wait Statistics


In-Memory OLTP

14

Exactly the same

Except

• Not persisted

• sys.sp_xtp_control_query_exec_stats

• Plan forcing can fail

• No memory grants

• Need to recompile to capture metrics


Plan Forcing

15

Plan Store

RuntimeStatistics

QueryOptimization

Process

Async

QueryExecution

Async

Plan forcing


Goal

Understand the information and mechanisms behind the Query Store

Learn how to work with and maintain the Query Store

Discover new opportunities and mechanisms for dealing with query performance tuning issues

16


Get in touch

scarydba.com

[email protected]

@gfritchey

Grant Fritchey


Questions?

18


Photo Credits

Meteor

London

Flight data recorder

Undo button

19

https://www.flickr.com/photos/bensutherland/5726336994/in/photolist-9J1Yub-xGyBJf-eL9MhQ-8s1e4L-dAVyhP-2jQbr-dAU1Cc-p38QhT-92L9pV-92L9Mt-qLKDW-92Poxj-92La3c-BsiXFa-92L8Yr-7jmGHZ-8MjSah-6T3k8s-dViiNt-MpXAx-iwLUjQ-apwb4W-djxorr-Lr1HC-6TmPhH-xoZZjw-bAe4Hk-96obkM-amD5HF-96oa6R-amD5qM-dtjxdA-dtjmdp-dtjxkG-dtjxgQ-dtjxj1-dtjkxM-dtjxbN-5S6r4-dtjwU9-dtjwYm-dtjx15-cQ2yhd-6AWYEm-47ehTb-5Q7c6M-dfpHdH-aYCvZt-ogtJCG-r3yXtG

https://www.flickr.com/photos/robhurson/16008133780/in/photolist-qozSsy-3KyJpy-58HkH5-LPF71-739UF3-4JHdBR-iH98pX-fASpFx-CxGbha-5gN9te-8MneV3-nfpPD2-7aerrg-62XE3Y-LPF6W-9aeyte-g6aG8-zggVw-g1pJP-4pdP1b-oEsm2a-8E831P-4H4Di7-pV2o9Q-wwej3B-51szs5-9D3mfN-qdLD6U-9M2DZZ-dFgswr-6fSNBA-57rAB4-sxYg8Z-omcYKo-C8EZBT-e5289N-cbMDhm-qPHVR7-siA7Jp-oQ9Scy-51szE1-kGPiS2-9QWv8j-9D2iuU-mHLhVJ-6YJsyH-qPHLqo-s24xCE-3nKuic-siCBm4

https://www.flickr.com/photos/avgeekjoe/13096509215/in/photolist-kXi2V2-5ZZWdP-6159fh-5ZZWh4-kXi2Ap-kXjxMU-kXiDcH-kXi4HF-kXiDCc-kXi3o6-boui5H-719m6U-7GN2sN-kXjxqG-boukYr-botSSK-botXBM-bouff8-bouc7k-bou11n-bou3GX-botQ4K-botV1t-botM7r-botJyx-o9Ryva-o87857-botFC6-bou8v8-nSEaQ6-oa1FFN-nSEuhB-nSDWjP-8qi2Kg-yx7Z-nRqfbC-hucVfT-qVPxFz-8pwrkv-mnD8aK-uz1TtZ-dXHkZv-9VNa75-w89W5C-9VNa3C-9VKk2k-9VKjXk-9VKjZV-9VNa2b-nxUecd

https://www.flickr.com/photos/dps/7161557/

the query store and sql tuning · 2019-03-08 · the query store and sql tuning grant fritchey...

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