Several questions about sp_BlitzIndex












1














When sp_BlitzIndex does index suggestions, the question in my head is as below:



Yes the suggested index would bring a lot of speed benefit when doing select statements. But there are also another costs for these indexes which are delete, insert, update queries



Do sp_BlitzIndex script take into consideration delete, insert, update costs as well? or only it does evaluate how much speed benefit would come with select statements?



Moreover, how can i list bad indexes via sp_BlitzIndex? and how are they determined to be bad?



Thank you very much for answers






sql-server sql-server-2017 sp-blitzindex







share|improve this question





























    1














    When sp_BlitzIndex does index suggestions, the question in my head is as below:



    Yes the suggested index would bring a lot of speed benefit when doing select statements. But there are also another costs for these indexes which are delete, insert, update queries



    Do sp_BlitzIndex script take into consideration delete, insert, update costs as well? or only it does evaluate how much speed benefit would come with select statements?



    Moreover, how can i list bad indexes via sp_BlitzIndex? and how are they determined to be bad?



    Thank you very much for answers






    sql-server sql-server-2017 sp-blitzindex







    share|improve this question



























      1












      1








      1







      When sp_BlitzIndex does index suggestions, the question in my head is as below:



      Yes the suggested index would bring a lot of speed benefit when doing select statements. But there are also another costs for these indexes which are delete, insert, update queries



      Do sp_BlitzIndex script take into consideration delete, insert, update costs as well? or only it does evaluate how much speed benefit would come with select statements?



      Moreover, how can i list bad indexes via sp_BlitzIndex? and how are they determined to be bad?



      Thank you very much for answers






      sql-server sql-server-2017 sp-blitzindex







      share|improve this question















      When sp_BlitzIndex does index suggestions, the question in my head is as below:



      Yes the suggested index would bring a lot of speed benefit when doing select statements. But there are also another costs for these indexes which are delete, insert, update queries



      Do sp_BlitzIndex script take into consideration delete, insert, update costs as well? or only it does evaluate how much speed benefit would come with select statements?



      Moreover, how can i list bad indexes via sp_BlitzIndex? and how are they determined to be bad?



      Thank you very much for answers






      sql-server sql-server-2017 sp-blitzindex




      sql-server sql-server-2017 sp-blitzindex






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 47 mins ago









      Brent Ozar

      33.7k19100229




      33.7k19100229










      asked 1 hour ago









      MonsterMMORPG

      271214




      271214






















          1 Answer
          1






          active

          oldest

          votes


















          4














          and welcome to Stack Exchange. Going forward, try to break questions out individually. Here's how to write a great question.




          Do sp_blitz script take into consideration delete, insert, update costs as well?




          sp_BlitzIndex has several sections based on SQL Server's diagnostic management views.




          • The missing indexes are based on sys.dm_db_missing_index_details, which don't take into account delete/update/inserts.

          • The existing indexes list is based on sys.dm_db_index_usage_stats and sys.dm_db_index_physical_stats, which do take into account deletes/updates/inserts.



          Moreover, how can i list bad indexes via sp_blitz? and how are they determined to be bad?




          sp_BlitzIndex doesn't call indexes bad. It treats indexes a lot like human behaviors - for example, hoarding isn't necessarily bad in small amounts, or agoraphobia, or kleptomania, or being a furry. All kinds of behaviors are okay in small doses. It's up to you, not the script, to determine if an index is bad.






          share|improve this answer





















            Your Answer








            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "182"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: false,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: null,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f226249%2fseveral-questions-about-sp-blitzindex%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            4














            and welcome to Stack Exchange. Going forward, try to break questions out individually. Here's how to write a great question.




            Do sp_blitz script take into consideration delete, insert, update costs as well?




            sp_BlitzIndex has several sections based on SQL Server's diagnostic management views.




            • The missing indexes are based on sys.dm_db_missing_index_details, which don't take into account delete/update/inserts.

            • The existing indexes list is based on sys.dm_db_index_usage_stats and sys.dm_db_index_physical_stats, which do take into account deletes/updates/inserts.



            Moreover, how can i list bad indexes via sp_blitz? and how are they determined to be bad?




            sp_BlitzIndex doesn't call indexes bad. It treats indexes a lot like human behaviors - for example, hoarding isn't necessarily bad in small amounts, or agoraphobia, or kleptomania, or being a furry. All kinds of behaviors are okay in small doses. It's up to you, not the script, to determine if an index is bad.






            share|improve this answer


























              4














              and welcome to Stack Exchange. Going forward, try to break questions out individually. Here's how to write a great question.




              Do sp_blitz script take into consideration delete, insert, update costs as well?




              sp_BlitzIndex has several sections based on SQL Server's diagnostic management views.




              • The missing indexes are based on sys.dm_db_missing_index_details, which don't take into account delete/update/inserts.

              • The existing indexes list is based on sys.dm_db_index_usage_stats and sys.dm_db_index_physical_stats, which do take into account deletes/updates/inserts.



              Moreover, how can i list bad indexes via sp_blitz? and how are they determined to be bad?




              sp_BlitzIndex doesn't call indexes bad. It treats indexes a lot like human behaviors - for example, hoarding isn't necessarily bad in small amounts, or agoraphobia, or kleptomania, or being a furry. All kinds of behaviors are okay in small doses. It's up to you, not the script, to determine if an index is bad.






              share|improve this answer
























                4












                4








                4






                and welcome to Stack Exchange. Going forward, try to break questions out individually. Here's how to write a great question.




                Do sp_blitz script take into consideration delete, insert, update costs as well?




                sp_BlitzIndex has several sections based on SQL Server's diagnostic management views.




                • The missing indexes are based on sys.dm_db_missing_index_details, which don't take into account delete/update/inserts.

                • The existing indexes list is based on sys.dm_db_index_usage_stats and sys.dm_db_index_physical_stats, which do take into account deletes/updates/inserts.



                Moreover, how can i list bad indexes via sp_blitz? and how are they determined to be bad?




                sp_BlitzIndex doesn't call indexes bad. It treats indexes a lot like human behaviors - for example, hoarding isn't necessarily bad in small amounts, or agoraphobia, or kleptomania, or being a furry. All kinds of behaviors are okay in small doses. It's up to you, not the script, to determine if an index is bad.






                share|improve this answer












                and welcome to Stack Exchange. Going forward, try to break questions out individually. Here's how to write a great question.




                Do sp_blitz script take into consideration delete, insert, update costs as well?




                sp_BlitzIndex has several sections based on SQL Server's diagnostic management views.




                • The missing indexes are based on sys.dm_db_missing_index_details, which don't take into account delete/update/inserts.

                • The existing indexes list is based on sys.dm_db_index_usage_stats and sys.dm_db_index_physical_stats, which do take into account deletes/updates/inserts.



                Moreover, how can i list bad indexes via sp_blitz? and how are they determined to be bad?




                sp_BlitzIndex doesn't call indexes bad. It treats indexes a lot like human behaviors - for example, hoarding isn't necessarily bad in small amounts, or agoraphobia, or kleptomania, or being a furry. All kinds of behaviors are okay in small doses. It's up to you, not the script, to determine if an index is bad.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 1 hour ago









                Brent Ozar

                33.7k19100229




                33.7k19100229






























                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Database Administrators Stack Exchange!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid …



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.





                    Some of your past answers have not been well-received, and you're in danger of being blocked from answering.


                    Please pay close attention to the following guidance:


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid …



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fdba.stackexchange.com%2fquestions%2f226249%2fseveral-questions-about-sp-blitzindex%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    -

                    Popular posts from this blog

                    Eastern Orthodox Church

                    Image
                    Not to be confused with Oriental Orthodoxy, Eastern Christianity, or Eastern Catholic Churches. "Eastern Orthodoxy", "Orthodox Church", "Orthodox Catholic Church", and "Orthodox Christian Church" redirect here. For other uses, see Orthodox (disambiguation). This article may be too long to read and navigate comfortably . The readable prose size is 132 kilobytes. Please consider splitting content into sub-articles, condensing it, or adding or removing subheadings. ( January 2018 ) Part of a series on the Eastern Orthodox Church Mosaic of Christ Pantocrator, Hagia Sophia Overview Structure Theology (History of theology) Liturgy Church history Holy Mysteries View of salvation View of Mary View of icons Background Crucifixion / Resurrection / Ascension of Jesus Christianity Christian Church Apostolic succession Four Marks of the Church Orthodoxy Organization Autocephaly Patriarchate ...
                    Read more

                    Zagreb

                    Image
                    This article is about the Croatian capital city. For other uses, see Zagreb (disambiguation). City in City of Zagreb, Croatia Zagreb City Grad Zagreb City of Zagreb Clockwise, from top: St. Mark's Square, Croatian State Archives, Zagreb Tram, Art Pavilion, Cibona & HOTO towers and Croatian National Theatre. Flag Coat of arms Zagreb Location of Zagreb in Croatia Show map of Croatia Zagreb Zagreb (Europe) Show map of Europe Coordinates: 45°49′N 15°59′E  /  45.817°N 15.983°E  / 45.817; 15.983 Coordinates: 45°49′N 15°59′E  /  45.817°N 15.983°E  / 45.817; 15.983 Country   Croatia County City of Zagreb RC diocese 1094 Free royal city 1242 Unified 1850 Subdivisions 17 city districts 218 local committees (70 settlements) Government  • Type Mayor-Council  • Mayor Milan Bandić (BM 365)  • City Assembly 51 members BM 365, ZL, NS-R (14) SDP, GLAS, HNS, HSS, NH-PS (13) ...
                    Read more

                    Understanding the information contained in the Deep Space Network XML data?

                    Image
                    up vote 1 down vote favorite NASA's Deep Space Network activity can be viewed conveniently at https://eyes.nasa.gov/dsn/dsn.html but if you would like data in a more raw XML form, it can be accessed as described in this answer Below is a small Python script that reads the XML into a list of dictionaries, and saves it to disk as a JSON. The dictionaries are organized at the higher level by dish, then by spacecraft per dish. Question: What are the most-likely meanings of all the data field contained in the Deep Space Network XML data? This is the example url from the other answer, used in the script below: https://eyes.nasa.gov/dsn/data/1365107113.xml def dictify(r,root=True): # https://stackoverflow.com/questions/2148119/how-to-convert-an-xml-string-to-a-dictionary-in-python/30923963#30923963 if root: ret...
                    Read more