Sfprobe: plugin_buffer_size is too short

General questions
1

Hi,

I am trying to configure sflow:

flow-accounting {
    interface eth0
    sflow {
        server 192.168.123.137 {
            port 6343
        }
        server 192.168.123.143 {
            port 6343
        }
    }
}

However, after some seconds I get:

vyos@vyos:~$ show flow-accounting
flow-accounting is not running

In the log file I see:

vyos pmacctd[6057]: ERROR ( 192.168.123.143-6343/sfprobe ): plugin_buffer_size is too short.

There is really almost no traffic, as this is a lab install.

What can I do?

Thanks for helping,
chris