use telemetry send to kafka,only vs message,but resport message too large,how to solve?

[mwt_nginx]

we have 2000 virtual server, use telemetry send to kafka,only vs message,but resport message too large, 

{
"class": "Telemetry",
"My_System": {
"class": "Telemetry_System",
"systemPoller": {
"interval": 60,
"actions": [
{
"excludeData": {},
"locations": {
"virtualservers": {
".*": {}
}
}
}
]
}
},
"My_Consumer": {
"class": "Telemetry_Consumer",
"type": "Kafka",
"host": "x.x.x.x",
"protocol": "binaryTcpTls",
"port": 9092,
"topic": "f5-events"
}
}

ltm log report  ：[telemetry.kafka.f5telemetry_default::My_consumer] error:Message SizeTOOLLarge

how to solve?