Varying and high responses time on set of IAAS VMs RRS feed

  • Question

  • Hi,

    We have a set of 12 IAAS webservers, out of which 6 are pointing to one SQL Server and another set of 6 points to second SQL Server.

    All these 12 IAAS Servers are load balanced using Azure ILB. 

    We are finding a variation in response time ~200ms delta when we run a transaction set of 1000 transactions  pointing our test calling app to each of the 12 servers of the load balancer. 

    We have noticed from this given 12 VMs, there are four which always report better response times ~500ms per txn

    and remaining always report 600-800 or 800 - 1000 ms per txn.

    Irrespective of SQL it points, server 1,7,8,11 always are good performers.

    How do we troubleshooting what is affecting the response times ?

    What perf counters can we collect in order to connect the dots of poor performance.



    Friday, February 24, 2017 1:49 PM

All replies

  • Just one more thing to add here, each of these servers is hosting a Web service which inturns call a SQL database.


    Friday, February 24, 2017 1:50 PM