[syslog-ng] udp packet receive errors

Hi, When logging to a remote syslog server , I see a lot of udp "packet receive errors" on the remote syslog server . The source machines don't show any such packet loss. I tried increasing net.core.wmem_max to 16MB and changed the log_fifo_size value to 2000 from default 100 on remote syslog server but still I continue to see udp packet receive errors . What could be the issue here ? The incoming request rate is inorder of 50k/sec during peak time. What can be done to minimize these errors? Syslog-ng version is syslog-ng 1.6.8 Thank you. -Paras