Do as follows on the device configured with the VSI:
When there are a large number of PWs, you can run the traffic-statistics enable (VSI-LDP view) command to enable the traffic statistics function on a Martini VPLS PW.
When there are a large number of PWs, you can run the traffic-statistics enable (VSI-BGPAD view) command to enable the traffic statistics function on all BGP AD VPLS PWs.