Question

如何找到二进制内存使用量增长的原因（取决于连接数）

我使用了rabbitmqctl eval'[garbage_collect（P）|| P＆lt; - processes（）]。' 但在统计数据

root@Broker1:~# /usr/sbin/rabbitmqctl status | grep binary    
  {binary,6709401976},   

root@Broker1:~# free -m   
           total       used       free     shared    buffers     cached
Mem:         16084       4147      11937         22        161       1550
-/+ buffers/cache:       2435      13649
Swap:         4183          0       4183

root@Broker2:~# /usr/sbin/rabbitmqctl status 


 Status of node rabbit@Broker2 ...
[{pid,515},
  {running_applications,
 [{rabbitmq_web_mqtt,"RabbitMQ MQTT-over-WebSockets adapter","3.6.9"},
  {rabbitmq_mqtt,"RabbitMQ MQTT Adapter","3.6.9"},
  {rabbitmq_web_stomp,"Rabbit WEB-STOMP - WebSockets to Stomp adapter",
      "3.6.9"},
  {rabbitmq_stomp,"RabbitMQ STOMP plugin","3.6.9"},
  {rabbitmq_management,"RabbitMQ Management Console","3.6.9"},
  {rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.6.9"},
  {rabbitmq_management_agent,"RabbitMQ Management Agent","3.6.9"},
  {rabbit,"RabbitMQ","3.6.9"},
  {os_mon,"CPO  CXC 138 46","2.3"},
  {cowboy,"Small, fast, modular HTTP server.","1.0.4"},
  {ranch,"Socket acceptor pool for TCP protocols.","1.3.0"},
  {ssl,"Erlang/OTP SSL application","5.3.6"},
  {public_key,"Public key infrastructure","0.22.1"},
  {cowlib,"Support library for manipulating Web protocols.","1.0.2"},
  {crypto,"CRYPTO","3.4.1"},
  {amqp_client,"RabbitMQ AMQP Client","3.6.9"},
  {rabbit_common,
      "Modules shared by rabbitmq-server and rabbitmq-erlang-client",
      "3.6.9"},
  {inets,"INETS  CXC 138 49","5.10.3"},
  {mnesia,"MNESIA  CXC 138 12","4.12.3"},
  {compiler,"ERTS  CXC 138 10","5.0.2"},
  {sockjs,"SockJS","0.3.4"},
  {xmerl,"XML parser","1.3.7"},
  {syntax_tools,"Syntax tools","1.6.16"},
  {asn1,"The Erlang ASN1 compiler version 3.0.2","3.0.2"},
  {sasl,"SASL  CXC 138 11","2.4.1"},
  {stdlib,"ERTS  CXC 138 10","2.2"},
  {kernel,"ERTS  CXC 138 10","3.0.3"}]},
 {os,{unix,linux}},
 {erlang_version,
 "Erlang/OTP 17 [erts-6.2] [source] [64-bit] [smp:10:10] [async-threads:160] [kernel-poll:true]\n"},
 {memory,
 [{total,3874499056},
  {connection_readers,598416},
  {connection_writers,139368},
  {connection_channels,774752},
  {connection_other,176069624},
  {queue_procs,36524016},
  {queue_slave_procs,0},
  {plugins,80184008},
  {other_proc,0},
  {mnesia,48042392},
  {metrics,7245632},
  {mgmt_db,74517952},
  {msg_index,1751384},
  {other_ets,14801208},
  {binary,3379246384},
  {code,28040419},
  {atom,1000601},
  {other_system,33438764}]},
 {alarms,[]},
 {listeners,
 [{clustering,2000,"::"},
  {amqp,5672,"::"},
  {http,15672,"::"},
  {stomp,61613,"::"},
  {'http/web-stomp',15674,"::"},
  {mqtt,1883,"::"},
  {'http/web-mqtt',15675,"::"}]},
 {vm_memory_high_watermark,{absolute,"12288MiB"}},
{vm_memory_limit,12884901888},
{disk_free_limit,50000000},
{disk_free,91027542016},
{file_descriptors,
 [{total_limit,65435},
  {total_used,9214},
  {sockets_limit,58889},
  {sockets_used,9002}]},
 {processes,[{limit,1048576},{used,42726}]},
 {run_queue,0},
 {uptime,82689},
 {kernel,{net_ticktime,60}}
]

             total       used       free     shared    buffers     cached
Mem:         16084       4517      11567         27        160       2487
-/+ buffers/cache:       1869      14215
Swap:         4189          0       4189

我的记忆是免费的！但是在内存增长之后，连接到服务器的速度非常慢!!

群集：rabbit @ Broker1（更改）

RabbitMQ 3.6.9，Erlang 17.3

rabbitmq.config

[
    {log_levels,       [{connection, none},{channel,none}]},
    {file_descriptors, [{total_limit, 65000}]},
    {kernel, [
            {log_levels,       [{connection, none},{channel,none}]},
            {inet_dist_listen_min, 2000},
            {inet_dist_listen_max, 65000}
    ]},
    {rabbit, [
            {loopback_users, []},
            {vm_memory_high_watermark, {absolute, "12288MiB"}},
            {vm_memory_high_watermark_paging_ratio, 0.60},
            {tcp_listeners,    [5672]},
            {log_levels,       [{connection, none},{channel,none}]},
            {heartbeat, 10000}
    ]},
    {rabbitmq_mqtt, [
            {log_levels,       [{connection, none},{channel,none}]},
            {default_user,     <<"guest">>},
            {default_pass,     <<"guest">>},
            {allow_anonymous,  false},
            {vhost,            <<"test">>},
            {exchange,         <<"amq.topic">>},
            {subscription_ttl, 180000},
            {prefetch,         10},
            {tcp_listeners,    [1883]},
            {tcp_listen_options, [
                    binary,
                    {packet,    raw},
                    {reuseaddr, false},
                    {backlog,   8192},
                    {nodelay,   true}
            ]}
    ]},
    {rabbitmq_stomp, [
            {default_vhost, <<"test">>},
            {exchange,         <<"amq.topic">>},
            {tcp_listen_options, [
                    {backlog,   128},
                    {nodelay,   true}
            ]}
    ]}
].

Answer 1

我相信您的实施不正确。我正在使用RabbitMQ在现场网站上进行实时通知，它没有任何问题。我有一个高达3500的并发客户端，但8GB RAM实例运行良好。

那你必须做什么？

您尚未指定用例。但是根据rabbitmq文档，只有当你有大量未传递的消息时，内存才会增长。许多未传递的消息可能会导致磁盘空间/ RAM空间，具体取决于客户端与您的连接方式。

如果每个用户有一个代理，那就非常昂贵。相反，如果您的用户将在多个端点（例如，电话和网络同时）接收相同的消息，则每个用户进行一次交换。在这种情况下，使用扇出交换并让用户订阅它。当交换中的消息达到零时，始终启用自动删除标志。使用非持久性交换;但要减少你的经纪人。

如果您确定一个用户只能在一台设备上连接而不是更多，那么您不需要进行扇出交换，而是为每个用户构建一个队列。仍然，启用自动删除标志。

通过交换或队列保持较少数量的经纪人和处理请求是有效的。

如果适合您的使用案例，可以使用的另一个选项是消息到期。我们假设您正在使用RabbitMQ向您的用户发送通知。但是，您可以将它们写入数据库并发出通知，您可以通过RMQ发送。如果用户不在线，可能大约10分钟或更长时间，到期是一个不错的选择。因为它是实时消息传递，而不是持久消息传递。他打算从数据库中读取它

注意：如果您解释用例，我会详细帮助您。

阅读本文以了解更多信息：https://www.rabbitmq.com/blog/2014/10/30/understanding-memory-use-with-rabbitmq-3-4/

如上所述，

所有二进制使用都是由队列中的消息引起的。

最好的方法是使用非持久性队列和自动过期消息！

请注意＆＃34;在记忆中＆＃34;和＃34;持久＆＃34;消息不是反义词：一个非持久性消息可以在内存压力下被分页出来持久性消息也可以在内存中。

这解释了你的问题！

为什么二进制内存使用量会在rabbitmq上增长

1 个答案: