Received vs Processed msg/s

[greenwood_labs]

So I see in my /var/log/daemon.log the following statistics every 15 minutes:

syslog:Apr 14 20:35:55 pi4-bullseye-32bit rbfeeder[672]: Receiver: connected   215.6 msg/s received       64.2 msg/s processed (30%)
 
The totals vary but the percentage of messages processed vs received is always around 30%.
Seems to me that I'm losing a lot of messages (received but not processed)

Anyone can clarify what does this mean? Is it normal? Or is there anything I can do to improve the rate of messaged processed?

Thanks