[rabbitmq-discuss] Queues with high memory consumption

Pablo Molnar pablomolnar at gmail.com
Mon May 7 19:28:58 BST 2012


My apologies, I haven't specified my environment:

rabbitmqctl status
Status of node 'rabbit at i-00000140-csm' ...
[{pid,20106},
 {running_applications,
     [{rabbitmq_management_visualiser,"RabbitMQ Visualiser","2.7.1"},
      {rabbitmq_management,"RabbitMQ Management Console","2.7.1"},
      {rabbitmq_mochiweb,"RabbitMQ Mochiweb Embedding","2.7.1"},
      {webmachine,"webmachine","1.7.0-rmq2.7.1-hg"},
      {amqp_client,"RabbitMQ AMQP Client","2.7.1"},
      {rabbitmq_management_agent,"RabbitMQ Management Agent","2.7.1"},
      {rabbit,"RabbitMQ","2.7.1"},
      {os_mon,"CPO  CXC 138 46","2.2.8"},
      {sasl,"SASL  CXC 138 11","2.2"},
      {mochiweb,"MochiMedia Web Server","1.3-rmq2.7.1-git"},
      {inets,"INETS  CXC 138 49","5.8"},
      {mnesia,"MNESIA  CXC 138 12","4.6"},
      {stdlib,"ERTS  CXC 138 10","1.18"},
      {kernel,"ERTS  CXC 138 10","2.15"}]},
 {os,{unix,linux}},
 {erlang_version,
     "Erlang R15B (erts-5.9) [source] [64-bit] [smp:4:4] [async-threads:0]
[hipe] [kernel-poll:false]\n"},
 {memory,
     [{total,4736488576},
      {processes,3832122172},
      {processes_used,3832066481},
      {system,904366404},
      {atom,561761},
      {atom_used,551430},
      {binary,98523592},
      {code,15193946},
      {ets,717445688}]},
 {vm_memory_high_watermark,0.6999999999761628},
 {vm_memory_limit,5873161011}]
...done.


[oraweb at i-00000140-csm ~]$ rabbitmqctl cluster_status
Cluster status of node 'rabbit at i-00000140-csm' ...
[{nodes,[{disc,['rabbit at i-0000001a-zsm','rabbit at i-00000007-asm']},
         {ram,['rabbit at i-00000140-csm','rabbit at i-000000ed-wsm',
               'rabbit at i-00000009-asm']}]},
 {running_nodes,['rabbit at i-0000001a-zsm','rabbit at i-00000009-asm',
                 'rabbit at i-000000ed-wsm','rabbit at i-00000007-asm',
                 'rabbit at i-00000140-csm']}]
...done.

curl to /api/nodes

[
   {
      "name":"rabbit at i-00000007-asm",
      "type":"disc",
      "running":true,
      "os_pid":"2355",
      "mem_ets":80370184,
      "mem_binary":172171304,
      "mem_proc":2660549995,
      "mem_proc_used":2660237395,
      "mem_atom":1320161,
      "mem_atom_used":1289709,
      "mem_code":15193946,
      "fd_used":39,
      "fd_total":131072,
      "sockets_used":12,
      "sockets_total":117872,
      "mem_used":3010567112,
      "mem_limit":5017881804,
      "mem_alarm":false,
      "proc_used":586,
      "proc_total":32768,
      "statistics_level":"fine",
      "erlang_version":"R15B",
      "uptime":954105232,
      "run_queue":1,
      "processors":2,
      "exchange_types":[
         {
            "name":"topic",
            "description":
"AMQP topic exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"fanout",
            "description":
"AMQP fanout exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"direct",
            "description":
"AMQP direct exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"headers",
            "description":
"AMQP headers exchange, as per the AMQP specification",
            "enabled":true
         }
      ],
      "auth_mechanisms":[
         {
            "name":"PLAIN",
            "description":"SASL PLAIN authentication mechanism",
            "enabled":true
         },
         {
            "name":"AMQPLAIN",
            "description":"QPid AMQPLAIN mechanism",
            "enabled":true
         },
         {
            "name":"RABBIT-CR-DEMO",
            "description":
"RabbitMQ Demo challenge-response authentication mechanism",
            "enabled":false
         }
      ],
      "applications":[
         {
            "name":"amqp_client",
            "description":"RabbitMQ AMQP Client",
            "version":"2.7.1"
         },
         {
            "name":"inets",
            "description":"INETS  CXC 138 49",
            "version":"5.8"
         },
         {
            "name":"kernel",
            "description":"ERTS  CXC 138 10",
            "version":"2.15"
         },
         {
            "name":"mnesia",
            "description":"MNESIA  CXC 138 12",
            "version":"4.6"
         },
         {
            "name":"mochiweb",
            "description":"MochiMedia Web Server",
            "version":"1.3-rmq2.7.1-git"
         },
         {
            "name":"os_mon",
            "description":"CPO  CXC 138 46",
            "version":"2.2.8"
         },
         {
            "name":"rabbit",
            "description":"RabbitMQ",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management",
            "description":"RabbitMQ Management Console",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_agent",
            "description":"RabbitMQ Management Agent",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_visualiser",
            "description":"RabbitMQ Visualiser",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_mochiweb",
            "description":"RabbitMQ Mochiweb Embedding",
            "version":"2.7.1"
         },
         {
            "name":"sasl",
            "description":"SASL  CXC 138 11",
            "version":"2.2"
         },
         {
            "name":"stdlib",
            "description":"ERTS  CXC 138 10",
            "version":"1.18"
         },
         {
            "name":"webmachine",
            "description":"webmachine",
            "version":"1.7.0-rmq2.7.1-hg"
         }
      ]
   },
   {
      "name":"rabbit at i-00000009-asm",
      "type":"ram",
      "running":true,
      "os_pid":"752",
      "mem_ets":31523784,
      "mem_binary":8080608,
      "mem_proc":155907055,
      "mem_proc_used":155933036,
      "mem_atom":1779921,
      "mem_atom_used":1753310,
      "mem_code":15219988,
      "fd_used":48,
      "fd_total":131072,
      "sockets_used":21,
      "sockets_total":117872,
      "mem_used":294359264,
      "mem_limit":5017881804,
      "mem_alarm":false,
      "proc_used":655,
      "proc_total":32768,
      "statistics_level":"fine",
      "erlang_version":"R15B",
      "uptime":1532913870,
      "run_queue":0,
      "processors":2,
      "exchange_types":[
         {
            "name":"topic",
            "description":
"AMQP topic exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"fanout",
            "description":
"AMQP fanout exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"direct",
            "description":
"AMQP direct exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"headers",
            "description":
"AMQP headers exchange, as per the AMQP specification",
            "enabled":true
         }
      ],
      "auth_mechanisms":[
         {
            "name":"PLAIN",
            "description":"SASL PLAIN authentication mechanism",
            "enabled":true
         },
         {
            "name":"AMQPLAIN",
            "description":"QPid AMQPLAIN mechanism",
            "enabled":true
         },
         {
            "name":"RABBIT-CR-DEMO",
            "description":
"RabbitMQ Demo challenge-response authentication mechanism",
            "enabled":false
         }
      ],
      "applications":[
         {
            "name":"amqp_client",
            "description":"RabbitMQ AMQP Client",
            "version":"2.7.1"
         },
         {
            "name":"inets",
            "description":"INETS  CXC 138 49",
            "version":"5.8"
         },
         {
            "name":"kernel",
            "description":"ERTS  CXC 138 10",
            "version":"2.15"
         },
         {
            "name":"mnesia",
            "description":"MNESIA  CXC 138 12",
            "version":"4.6"
         },
         {
            "name":"mochiweb",
            "description":"MochiMedia Web Server",
            "version":"1.3-rmq2.7.1-git"
         },
         {
            "name":"os_mon",
            "description":"CPO  CXC 138 46",
            "version":"2.2.8"
         },
         {
            "name":"rabbit",
            "description":"RabbitMQ",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management",
            "description":"RabbitMQ Management Console",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_agent",
            "description":"RabbitMQ Management Agent",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_mochiweb",
            "description":"RabbitMQ Mochiweb Embedding",
            "version":"2.7.1"
         },
         {
            "name":"sasl",
            "description":"SASL  CXC 138 11",
            "version":"2.2"
         },
         {
            "name":"stdlib",
            "description":"ERTS  CXC 138 10",
            "version":"1.18"
         },
         {
            "name":"webmachine",
            "description":"webmachine",
            "version":"1.7.0-rmq2.7.1-hg"
         }
      ]
   },
   {
      "name":"rabbit at i-0000001a-zsm",
      "type":"disc",
      "running":true,
      "os_pid":"15193",
      "mem_ets":57934352,
      "mem_binary":41261304,
      "mem_proc":984084797,
      "mem_proc_used":983864979,
      "mem_atom":695185,
      "mem_atom_used":672799,
      "mem_code":15225838,
      "fd_used":57,
      "fd_total":131072,
      "sockets_used":11,
      "sockets_total":117872,
      "mem_used":1177935432,
      "mem_limit":5017881804,
      "mem_alarm":false,
      "proc_used":618,
      "proc_total":32768,
      "statistics_level":"fine",
      "erlang_version":"R15B",
      "uptime":82787221,
      "run_queue":0,
      "processors":2,
      "exchange_types":[
         {
            "name":"topic",
            "description":
"AMQP topic exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"fanout",
            "description":
"AMQP fanout exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"direct",
            "description":
"AMQP direct exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"headers",
            "description":
"AMQP headers exchange, as per the AMQP specification",
            "enabled":true
         }
      ],
      "auth_mechanisms":[
         {
            "name":"PLAIN",
            "description":"SASL PLAIN authentication mechanism",
            "enabled":true
         },
         {
            "name":"AMQPLAIN",
            "description":"QPid AMQPLAIN mechanism",
            "enabled":true
         },
         {
            "name":"RABBIT-CR-DEMO",
            "description":
"RabbitMQ Demo challenge-response authentication mechanism",
            "enabled":false
         }
      ],
      "applications":[
         {
            "name":"amqp_client",
            "description":"RabbitMQ AMQP Client",
            "version":"2.7.1"
         },
         {
            "name":"inets",
            "description":"INETS  CXC 138 49",
            "version":"5.8"
         },
         {
            "name":"kernel",
            "description":"ERTS  CXC 138 10",
            "version":"2.15"
         },
         {
            "name":"mnesia",
            "description":"MNESIA  CXC 138 12",
            "version":"4.6"
         },
         {
            "name":"mochiweb",
            "description":"MochiMedia Web Server",
            "version":"1.3-rmq2.7.1-git"
         },
         {
            "name":"os_mon",
            "description":"CPO  CXC 138 46",
            "version":"2.2.8"
         },
         {
            "name":"rabbit",
            "description":"RabbitMQ",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management",
            "description":"RabbitMQ Management Console",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_agent",
            "description":"RabbitMQ Management Agent",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_visualiser",
            "description":"RabbitMQ Visualiser",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_mochiweb",
            "description":"RabbitMQ Mochiweb Embedding",
            "version":"2.7.1"
         },
         {
            "name":"sasl",
            "description":"SASL  CXC 138 11",
            "version":"2.2"
         },
         {
            "name":"stdlib",
            "description":"ERTS  CXC 138 10",
            "version":"1.18"
         },
         {
            "name":"webmachine",
            "description":"webmachine",
            "version":"1.7.0-rmq2.7.1-hg"
         }
      ]
   },
   {
      "name":"rabbit at i-000000ed-wsm",
      "type":"ram",
      "running":true,
      "os_pid":"6451",
      "mem_ets":39572576,
      "mem_binary":71107032,
      "mem_proc":1325493043,
      "mem_proc_used":1325494995,
      "mem_atom":2074889,
      "mem_atom_used":2073540,
      "mem_code":15225838,
      "fd_used":47,
      "fd_total":131072,
      "sockets_used":19,
      "sockets_total":117872,
      "mem_used":1536134064,
      "mem_limit":5017685196,
      "mem_alarm":false,
      "proc_used":1213,
      "proc_total":32768,
      "statistics_level":"fine",
      "erlang_version":"R15B",
      "uptime":2017204497,
      "run_queue":23,
      "processors":4,
      "exchange_types":[
         {
            "name":"topic",
            "description":
"AMQP topic exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"fanout",
            "description":
"AMQP fanout exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"direct",
            "description":
"AMQP direct exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"headers",
            "description":
"AMQP headers exchange, as per the AMQP specification",
            "enabled":true
         }
      ],
      "auth_mechanisms":[
         {
            "name":"PLAIN",
            "description":"SASL PLAIN authentication mechanism",
            "enabled":true
         },
         {
            "name":"AMQPLAIN",
            "description":"QPid AMQPLAIN mechanism",
            "enabled":true
         },
         {
            "name":"RABBIT-CR-DEMO",
            "description":
"RabbitMQ Demo challenge-response authentication mechanism",
            "enabled":false
         }
      ],
      "applications":[
         {
            "name":"amqp_client",
            "description":"RabbitMQ AMQP Client",
            "version":"2.7.1"
         },
         {
            "name":"inets",
            "description":"INETS  CXC 138 49",
            "version":"5.8"
         },
         {
            "name":"kernel",
            "description":"ERTS  CXC 138 10",
            "version":"2.15"
         },
         {
            "name":"mnesia",
            "description":"MNESIA  CXC 138 12",
            "version":"4.6"
         },
         {
            "name":"mochiweb",
            "description":"MochiMedia Web Server",
            "version":"1.3-rmq2.7.1-git"
         },
         {
            "name":"os_mon",
            "description":"CPO  CXC 138 46",
            "version":"2.2.8"
         },
         {
            "name":"rabbit",
            "description":"RabbitMQ",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management",
            "description":"RabbitMQ Management Console",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_agent",
            "description":"RabbitMQ Management Agent",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_visualiser",
            "description":"RabbitMQ Visualiser",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_mochiweb",
            "description":"RabbitMQ Mochiweb Embedding",
            "version":"2.7.1"
         },
         {
            "name":"sasl",
            "description":"SASL  CXC 138 11",
            "version":"2.2"
         },
         {
            "name":"stdlib",
            "description":"ERTS  CXC 138 10",
            "version":"1.18"
         },
         {
            "name":"webmachine",
            "description":"webmachine",
            "version":"1.7.0-rmq2.7.1-hg"
         }
      ]
   },
   {
      "name":"rabbit at i-00000140-csm",
      "type":"ram",
      "running":true,
      "os_pid":"20106",
      "mem_ets":729336240,
      "mem_binary":100785248,
      "mem_proc":3863316567,
      "mem_proc_used":3863545491,
      "mem_atom":561761,
      "mem_atom_used":551523,
      "mem_code":15193946,
      "fd_used":114,
      "fd_total":131072,
      "sockets_used":1,
      "sockets_total":117872,
      "mem_used":4781589152,
      "mem_limit":5873161011,
      "mem_alarm":false,
      "proc_used":176,
      "proc_total":32768,
      "statistics_level":"fine",
      "erlang_version":"R15B",
      "uptime":16101251,
      "run_queue":3,
      "processors":4,
      "exchange_types":[
         {
            "name":"topic",
            "description":
"AMQP topic exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"fanout",
            "description":
"AMQP fanout exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"direct",
            "description":
"AMQP direct exchange, as per the AMQP specification",
            "enabled":true
         },
         {
            "name":"headers",
            "description":
"AMQP headers exchange, as per the AMQP specification",
            "enabled":true
         }
      ],
      "auth_mechanisms":[
         {
            "name":"PLAIN",
            "description":"SASL PLAIN authentication mechanism",
            "enabled":true
         },
         {
            "name":"AMQPLAIN",
            "description":"QPid AMQPLAIN mechanism",
            "enabled":true
         },
         {
            "name":"RABBIT-CR-DEMO",
            "description":
"RabbitMQ Demo challenge-response authentication mechanism",
            "enabled":false
         }
      ],
      "applications":[
         {
            "name":"amqp_client",
            "description":"RabbitMQ AMQP Client",
            "version":"2.7.1"
         },
         {
            "name":"inets",
            "description":"INETS  CXC 138 49",
            "version":"5.8"
         },
         {
            "name":"kernel",
            "description":"ERTS  CXC 138 10",
            "version":"2.15"
         },
         {
            "name":"mnesia",
            "description":"MNESIA  CXC 138 12",
            "version":"4.6"
         },
         {
            "name":"mochiweb",
            "description":"MochiMedia Web Server",
            "version":"1.3-rmq2.7.1-git"
         },
         {
            "name":"os_mon",
            "description":"CPO  CXC 138 46",
            "version":"2.2.8"
         },
         {
            "name":"rabbit",
            "description":"RabbitMQ",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management",
            "description":"RabbitMQ Management Console",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_agent",
            "description":"RabbitMQ Management Agent",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_management_visualiser",
            "description":"RabbitMQ Visualiser",
            "version":"2.7.1"
         },
         {
            "name":"rabbitmq_mochiweb",
            "description":"RabbitMQ Mochiweb Embedding",
            "version":"2.7.1"
         },
         {
            "name":"sasl",
            "description":"SASL  CXC 138 11",
            "version":"2.2"
         },
         {
            "name":"stdlib",
            "description":"ERTS  CXC 138 10",
            "version":"1.18"
         },
         {
            "name":"webmachine",
            "description":"webmachine",
            "version":"1.7.0-rmq2.7.1-hg"
         }
      ]
   }
]

On Mon, May 7, 2012 at 2:32 PM, Pablo Molnar <pablomolnar at gmail.com> wrote:

> Hello,
>
> I'm trying to figure out why the memory consumption of some queues are
> extremely high although there is almost none messages ready to consume.
> For instance this queue has only 3 messages but consumes 2.4GB of RAM.
>
> {
>    "exclusive_consumer_tag":"",
>    "messages_ready":0,
>    "messages_unacknowledged":3,
>    "messages":3,
>    "consumers":25,
>    "memory":2586777216,
>    "slave_nodes":[
>
>    ],
>    "backing_queue_status":{
>       "q1":0,
>       "q2":0,
>       "delta":[
>          "delta",
>          "undefined",
>          0,
>          "undefined"
>       ],
>       "q3":0,
>       "q4":0,
>       "len":0,
>       "pending_acks":3,
>       "target_ram_count":0,
>       "ram_msg_count":0,
>       "ram_ack_count":0,
>       "next_seq_id":72528926,
>       "persistent_count":3,
>       "avg_ingress_rate":42.456013780009044,
>       "avg_egress_rate":42.456013780009044,
>       "avg_ack_ingress_rate":42.456013780009044,
>       "avg_ack_egress_rate":42.456013780009044
>    },
>    "messages_details":{
>       "rate":0.0,
>       "interval":5035424,
>       "last_event":1336411139483
>    },
>    "messages_ready_details":{
>       "rate":0.0,
>       "interval":5035424,
>       "last_event":1336411139483
>    },
>    "messages_unacknowledged_details":{
>       "rate":0.0,
>       "interval":5035424,
>       "last_event":1336411139483
>    },
>    "incoming":[
>       {
>          "stats":{
>             "publish":1734006,
>             "publish_details":{
>                "rate":102.09667507804102,
>                "interval":13252280,
>                "last_event":1336411142499
>             }
>          },
>          "exchange":{
>             "name":"items_feed_ex",
>             "vhost":"items"
>          }
>       }
>    ],
>    "deliveries":[
>       {
>          "stats":{
>             "ack":49131,
>             "ack_details":{
>                "rate":1.175108844456718,
>                "interval":5105910,
>                "last_event":1336411141663
>             },
>             "deliver":49153,
>             "deliver_details":{
>                "rate":0.9792573703805982,
>                "interval":5105910,
>                "last_event":1336411141663
>             },
>             "deliver_get":49153,
>             "deliver_get_details":{
>                "rate":0.9792573703805982,
>                "interval":5105910,
>                "last_event":1336411141663
>             },
>             "redeliver":24,
>             "redeliver_details":{
>                "rate":0.0,
>                "interval":5105910,
>                "last_event":1336411141663
>             }
>          },
>          "channel_details":{
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>       },
>       {
>          "channel_details":{
>             "name":"172.16.151.171:36331:48",
>             "number":48,
>             "connection_name":"172.16.151.171:36331",
>             "peer_address":"172.16.151.171",
>             "peer_port":36331
>          },
>          "queue_details":{
>             "name":"items_bigqueue",
>             "vhost":"items"
>          },
>          "consumer_tag":"amq.ctag-ADQz44E00QKduPSM3r6EfX",
>          "exclusive":false,
>          "ack_required":true
>       },
>       {
>          "channel_details":{
>             "name":"172.16.151.171:36331:49",
>             "number":49,
>             "connection_name":"172.16.151.171:36331",
>             "peer_address":"172.16.151.171",
>             "peer_port":36331
>          },
>          "queue_details":{
>             "name":"items_bigqueue",
>             "vhost":"items"
>          },
>          "consumer_tag":"amq.ctag-AtN-iVuD_KU5S8AJS8P_ET",
>          "exclusive":false,
>          "ack_required":true
>       },
>       {
>          "channel_details":{
>             "name":"172.16.151.171:36331:50",
>             "number":50,
>             "connection_name":"172.16.151.171:36331",
>             "peer_address":"172.16.151.171",
>             "peer_port":36331
>          },
>          "queue_details":{
>             "name":"items_bigqueue",
>             "vhost":"items"
>          },
>          "consumer_tag":"amq.ctag-wuYNkpbMVPjTEFDIG4Xt4q",
>          "exclusive":false,
>          "ack_required":true
>       }
>    ],
>    "name":"items_bigqueue",
>    "vhost":"items",
>    "durable":true,
>    "auto_delete":false,
>    "arguments":{
>
>    },
>    "node":"rabbit at i-00000007-asm"
> }
>
> Cheers,
> Pablo
>
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