RabbitMq相关运维

# 命令查询所有用户列表
rabbitmqctl list_users

# 使用命令对 xiandian-admin 用户进行授权
set_permissions xiandian-admin '.*' '.*' '.*'


# 查看队列信息，所包含的信息包括 name，arguments， messages，memory，将操作命令和返回结果以文本形式提交到答题框。
rabbitmqctl list_queues


#单节点MQ状态
rabbitmqctl status


[{total,169730360},
      {connection_readers,504592},
      {connection_writers,25608},
      {connection_channels,359456},
      {connection_other,1317920},
      {queue_procs,64771056},
      {queue_slave_procs,0},
      {plugins,5609496},
      {other_proc,25624816},
      {mnesia,105584},
      {metrics,423720},
      {mgmt_db,2129968},
      {msg_index,5115496},
      {other_ets,2766648},
      {binary,7370464},
      {code,24542395},
      {atom,1033401},
      {other_system,28450628}]


1.定位 linux 系统内存占用最高进程

（1）输入 top 指令
然后输入大写的 M（Shift+m），基于内存占用倒序，找到占用最大内存的进程，如果内存占用最大的为 beam.smp 则为 RabbitMQ 进程占用。


# 查看相应端口占用
netstat -lnutp |grep 15672


# rabbitmqctl status

 {alarms,[]},
 {listeners,[{clustering,25672,"::"},{amqp,5672,"::"},{http,15672,"::"}]},
 {vm_memory_high_watermark,0.4},
 {vm_memory_limit,6742941696},
 {disk_free_limit,50000000},
 {disk_free,27445518336},
 {file_descriptors,
     [{total_limit,65435},
      {total_used,37},
      {sockets_limit,58889},
      {sockets_used,18}]},
 {processes,[{limit,1048576},{used,591}]},
 {run_queue,0},
 {uptime,1916528},
 {kernel,{net_ticktime,60}}]


修改RabbitMQ最大连接数
# https://blog.51cto.com/3646344/2162940

RabbitMQ读写消息的Java Demo

 /**生产者:发送成功后一定要关闭 connection,才不会产生临时队列,临时队列就是,如:amq.gen-7Z5nxW9MqSHllIS2QI6diQ
            * 消费者:消费成成功后只要关闭channel
            *
            * **/;

https://blog.csdn.net/yzh_1346983557/article/details/81204901