Netty optimization skills

1. the startup parameters selected during JVM startup are:-server-Xms2048m-Xmx2048m-XX: + UseParallelGC-XX: + AggressiveOpts-XX: + UseFastAccessorMethods 2 avoid small data communication and unstable data communication with an indefinite length. Data splicing and packet format setting can be used to stabilize and optimize the throughput. 3 json Data Protocol 4 static ChannelFactory. If this object is generated in large quantities, this will cause direct out of memory 5 stress testing in linux, using ulimit-n 65535 can achieve high performance ulimit-n to modify the number of concurrent file Quotas