[rabbitmq-discuss] Queues with high memory consumption

Pablo Molnar pablomolnar at gmail.com
Mon May 7 18:32:44 BST 2012


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":{
            "name":"172.16.151.171:45194:49",
            "number":49,
            "connection_name":"172.16.151.171:45194",
            "peer_address":"172.16.151.171",
            "peer_port":45194
         }
      },
      {
         "stats":{
            "ack":40909,
            "ack_details":{
               "rate":1.3173608970399655,
               "interval":5313654,
               "last_event":1336411141077
            },
            "deliver":40929,
            "deliver_details":{
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            "deliver_get":40929,
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            "redeliver":23,
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         },
         "channel_details":{
            "name":"172.16.151.171:36273:49",
            "number":49,
            "connection_name":"172.16.151.171:36273",
            "peer_address":"172.16.151.171",
            "peer_port":36273
         }
      },
      {
         "stats":{
            "ack":23080,
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               "rate":0,
               "interval":5059374,
               "last_event":1335489316168
            },
            "deliver":23091,
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            "deliver_get":23091,
            "deliver_get_details":{
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         "channel_details":{
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            "number":46,
            "connection_name":"unknown",
            "peer_address":"unknown",
            "peer_port":"unknown"
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      },
      {
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            "redeliver":12,
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         },
         "channel_details":{
            "name":"172.16.151.171:33574:18",
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            "connection_name":"172.16.151.171:33574",
            "peer_address":"172.16.151.171",
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      },
      {
         "stats":{
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            "peer_address":"172.16.151.171",
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         "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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