SSRS issue in SharePoint 2013 integrated mode .

I did recently come across an issue with SSRS in SharePoint 2013 integrated mode , the error was while opening up a SSRS report . Error stated as below

·        An error occurred during client rendering.

o   The requested service, 'http://serverName:32843/39c0f43bbd794f929239eb6ede09edb6/ReportStreaming.svc' could not be activated. See the server's diagnostic trace logs for more information.

The requested service, 'http://serverName:32843/39c0f43bbd794f929239eb6ede09edb6/ReportStreaming.svc' could not be activated. See the server's diagnostic trace logs for more information.

There was no much information on the above issue , only way to figured out the issue was by testing the SSRS webservice URL

open the management studio and enter below command
Get-SPRSServiceApplication

You will get the result with Name,ID and UEAccountName

You can frame the report service webapplication ID with this GUID as below

1)    http://serverName:32843/39c0f43bbd794f929239eb6ede09edb6/ReportingWebService.svc --> this URL is working fine 

12)http://serverName:32843/39c0f43bbd794f929239eb6ede09edb6/ReportStreaming. à this one throws a error as below 

Memory gates checking failed because the free memory (208904192 bytes) is less than 5% of total memory.  As a result, the service will not be available for incoming requests.  To resolve this, either reduce the load on the machine or adjust the value of minFreeMemoryPercentageToActivateService on the serviceHostingEnvironment config element.

Increasing the RAM of the server resolved the issue