Change networking settings if you’re anticipating a high data insertion rate via UDP protocol with bursts of 100,000 packets per second or more.
Increase Receiving Buffer
Increase the maximum receiving buffer on the operating system
sudo sysctl -w net.core.rmem_max=8388608
This setting allows the operating system and the database to buffer up to 8 megabytes of received packets, in the case that the inserting rate is temporarily higher than the ATSD throughput rate.
The increased buffer also reduces the number of UDP datagrams dropped due to buffer overflow.
Increase UDP buffer in ATSD
To increase the UDP buffer in ATSD, add the following property to
# default value is 8192 udp.receive.buffer.size.kb = 20000