how to make table to occupy parent container height

Hello,
 
Thank you for reaching out to us.
 
The desired result can be achieved by specifying the height property of the container in percents.
Please see the following code snippet for the reference:

var pivot = new Flexmonster({
  container: "pivotContainer",
  componentFolder: "<https://cdn.flexmonster.com/>",
  height: "100%",
  toolbar: true,
  report: {
    ...
  }
});

 
Please let us know if it works for you.
Do not hesitate to contact us in case additional questions arise.
 
Regards,
Illia