Zscaler NSS server forwarding logs in bursts to Qradar

I am forwarding web logs from the Zscaler NSS server to a Event Processor in my Qradar stack. I isolated the Zscaler logs on this one EP. THere are no other log sources forwarding to this destination. The Zscaler logs seem to be sent in bursts that overwelm the EP, which is not lacking in resources normally. There are several large spikes in logs per day.
Is there a way to throttle or buffer the forwarding of the logs on the NSS server in order to send more of a steady stream instead of these huge spikes?

When you edit your NSS feed there should be an option ‘SIEM Rate’.
When you set that one from ‘limited’ to ‘unlimited’ you can enter a ‘events per second’ limit.