Dear Qlik users


We are aware of a special Windows security update which Microsoft will be rolling out in the near future which may affect CPU performance.   The update addresses security vulnerabilities in CPUs, these vulnerabilities are known as Spectre and Meltdown.  We have not yet been able to quantify whether this security update impacts QlikView or Qlik Sense, however please be aware that there might be performance implications which are outside of our control.


More information can be found here:


Update: Our internal [preliminary] scalability and perfomance tests do not show any pronounced impact from this Windows patch.   Please note these are test scenarios and may not cover all use case or customer specific environments. 


Thank you for choosing Qlik!


Kind regards

Global Support Team