NSX Manager 6.3.2 API calls slow response

Hi Team,

    We have a heavy loaded  NSX environment with more than 70 NSX Edges  ( NSX LB and NSX ESG) , 35 DLR's ..  3000 DFW rules..  Current configuration of NSX Manger is 16vCPU and 32 GB ram .

There are in-house tools which are making API calls to NSX Manager and they are complaining that disabling/Enabling Pool Members on NSX LB is taking much more than time than it used to be   .

Please help me  on these . Can't find answers in Google or NSX API guide.

1. How can i find no. of API Calls to NSX Manager   in one hour /day /week etc..

2. where are NSX API Logs in NSX Manager .

3.  How can i find which API call had how much response time in the PAST..

Thanks

Tarun Gupta