Do SQL Servers in a cluster need to have the same memory?












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I have two servers in always on failover configuration with windows clustering underneath.



Do both servers need to have the same memory?

One of our DBs that uses a lot of memory is not in the AG, so ideally I don't want to give the secondary server the same memory as the primary because - it will never need to run the big DB.










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    I have two servers in always on failover configuration with windows clustering underneath.



    Do both servers need to have the same memory?

    One of our DBs that uses a lot of memory is not in the AG, so ideally I don't want to give the secondary server the same memory as the primary because - it will never need to run the big DB.










    share|improve this question









    New contributor




    Craig P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      2












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      2







      I have two servers in always on failover configuration with windows clustering underneath.



      Do both servers need to have the same memory?

      One of our DBs that uses a lot of memory is not in the AG, so ideally I don't want to give the secondary server the same memory as the primary because - it will never need to run the big DB.










      share|improve this question









      New contributor




      Craig P is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I have two servers in always on failover configuration with windows clustering underneath.



      Do both servers need to have the same memory?

      One of our DBs that uses a lot of memory is not in the AG, so ideally I don't want to give the secondary server the same memory as the primary because - it will never need to run the big DB.







      sql-server sql-server-2014 availability-groups






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      edited 59 mins ago









      jadarnel27

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      asked 1 hour ago









      Craig PCraig P

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          There's no functional requirement for servers in a cluster to have the exact same specs (memory, CPU, etc). So you can definitely set it up this way.



          To some extent, you've answered your own question. To put it differently - if one of the servers in the cluster will never be running the same workload as the other, you should tune that server appropriately for its workload. It would be a waste of resources to do otherwise.






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            Thinking about the future, databases will come and go most likely. Do you want that extra pain of remembering that one of the servers in the AOAG configuration is not set the same? We always set the memory the same in all servers involved. Also, if you have to run all databases on one server (the one with lesser mem) for any extended time, you do not have to adjust the MaxMem instance level setting because of a lower setting.






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              2 Answers
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              2 Answers
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              active

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              active

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              2














              There's no functional requirement for servers in a cluster to have the exact same specs (memory, CPU, etc). So you can definitely set it up this way.



              To some extent, you've answered your own question. To put it differently - if one of the servers in the cluster will never be running the same workload as the other, you should tune that server appropriately for its workload. It would be a waste of resources to do otherwise.






              share|improve this answer


























                2














                There's no functional requirement for servers in a cluster to have the exact same specs (memory, CPU, etc). So you can definitely set it up this way.



                To some extent, you've answered your own question. To put it differently - if one of the servers in the cluster will never be running the same workload as the other, you should tune that server appropriately for its workload. It would be a waste of resources to do otherwise.






                share|improve this answer
























                  2












                  2








                  2






                  There's no functional requirement for servers in a cluster to have the exact same specs (memory, CPU, etc). So you can definitely set it up this way.



                  To some extent, you've answered your own question. To put it differently - if one of the servers in the cluster will never be running the same workload as the other, you should tune that server appropriately for its workload. It would be a waste of resources to do otherwise.






                  share|improve this answer












                  There's no functional requirement for servers in a cluster to have the exact same specs (memory, CPU, etc). So you can definitely set it up this way.



                  To some extent, you've answered your own question. To put it differently - if one of the servers in the cluster will never be running the same workload as the other, you should tune that server appropriately for its workload. It would be a waste of resources to do otherwise.







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 55 mins ago









                  jadarnel27jadarnel27

                  3,7451330




                  3,7451330

























                      0














                      Thinking about the future, databases will come and go most likely. Do you want that extra pain of remembering that one of the servers in the AOAG configuration is not set the same? We always set the memory the same in all servers involved. Also, if you have to run all databases on one server (the one with lesser mem) for any extended time, you do not have to adjust the MaxMem instance level setting because of a lower setting.






                      share|improve this answer


























                        0














                        Thinking about the future, databases will come and go most likely. Do you want that extra pain of remembering that one of the servers in the AOAG configuration is not set the same? We always set the memory the same in all servers involved. Also, if you have to run all databases on one server (the one with lesser mem) for any extended time, you do not have to adjust the MaxMem instance level setting because of a lower setting.






                        share|improve this answer
























                          0












                          0








                          0






                          Thinking about the future, databases will come and go most likely. Do you want that extra pain of remembering that one of the servers in the AOAG configuration is not set the same? We always set the memory the same in all servers involved. Also, if you have to run all databases on one server (the one with lesser mem) for any extended time, you do not have to adjust the MaxMem instance level setting because of a lower setting.






                          share|improve this answer












                          Thinking about the future, databases will come and go most likely. Do you want that extra pain of remembering that one of the servers in the AOAG configuration is not set the same? We always set the memory the same in all servers involved. Also, if you have to run all databases on one server (the one with lesser mem) for any extended time, you do not have to adjust the MaxMem instance level setting because of a lower setting.







                          share|improve this answer












                          share|improve this answer



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                          answered 1 hour ago









                          rvsc48rvsc48

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