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UDP transport for logstash-gelf

udp:hostname

Buffer size

The UDP sender uses pooled buffers to reduce GC pressure. The size defaults to 811.008 bytes (99 * 8192). The size can be controlled by setting the logstash-gelf.buffer.size property (system property). Buffering is disabled if logstash-gelf.buffer.size is set to 0 (zero).

Maximum Message Size

IP packets are subject to packet fragmentation during transport unless the DF bit is set or an active network component isn't capable of fragmentation. In such cases, make sure to adjust the maximumMessageSize to your MTU size with considering a 12 bytes GELF header.