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connPoolStats

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定义

connPoolStats

The command connPoolStats returns information regarding the open outgoing connections from the current database instance to other members of the 分片集群 or 复制集.

要运行 connPoolStats，请使用 db.runCommand( { <command> } ) 方法。

注意

connPoolStats only returns meaningful results for mongos instances and for mongod instances in sharded clusters.

兼容性

此命令可用于以下环境中托管的部署：

注意

所有 MongoDB Atlas 集群都支持此命令。有关 Atlas 对所有命令的支持的信息，请参阅不支持的命令。

语法

该命令具有以下语法：

db.runCommand(
   {
     connPoolStats: 1
   }
)

The value of the argument (i.e. 1 ) does not affect the output of the command.

行为

connPoolStats includes aggregated statistics in its output:

  • The hosts field displays the information aggregated by host.

  • The pools field displays the information aggregated by pool.

注意

To avoid interference with any running operations, connPoolStats does not take any locks. As such, the counts may change slightly as connPoolStats gathers information, resulting in slight differences between the hosts and pools connection counts.

例子

The following operation uses the db.runCommand() method to run the connPoolStats command on a mongos of a sharded cluster. The sharded cluster has 2 shards, each a single-member replica set, and a config server replica set. The mongos runs on a 4-core machine.

db.runCommand( { "connPoolStats" : 1 } )

The command returns the output of the following form:

注意

The connPoolStats output varies depending on the deployment and the member against which you run connPoolStats among other factors.

{
   "numClientConnections" : <num>,
   "numAScopedConnections" : <num>,
   "totalInUse" : <num>,
   "totalAvailable" : <num>,
   "totalLeased" : <num>,
   "totalCreated" : <num>,
   "totalRefreshing" : <num>,
   "replicaSetMatchingStrategy" : <string>,
   "acquisitionWaitTimes" : {  // Added in MongoDB 6.3
      "(-inf, 0ms)" : { "count" : <num> },
      "[0ms, 50ms)" : { "count" : <num> },
      "[50ms, 100ms)" : { "count" : <num> },
      "[100ms, 150ms)" : { "count" : <num> },
      "[150ms, 200ms)" : { "count" : <num> },
      "[200ms, 250ms)" : { "count" : <num> },
      "[250ms, 300ms)" : { "count" : <num> },
      "[300ms, 350ms)" : { "count" : <num> },
      "[350ms, 400ms)" : { "count" : <num> },
      "[400ms, 450ms)" : { "count" : <num> },
      "[450ms, 500ms)" : { "count" : <num> },
      "[500ms, 550ms)" : { "count" : <num> },
      "[550ms, 600ms)" : { "count" : <num> },
      "[600ms, 650ms)" : { "count" : <num> },
      "[650ms, 700ms)" : { "count" : <num> },
      "[700ms, 750ms)" : { "count" : <num> },
      "[750ms, 800ms)" : { "count" : <num> },
      "[800ms, 850ms)" : { "count" : <num> },
      "[850ms, 900ms)" : { "count" : <num> },
      "[900ms, 950ms)" : { "count" : <num> },
      "[950ms, 1000ms)" : { "count" : <num> },
      "[1000ms, inf)" : { "count" : <num> },
      "totalCount" : <num>
   },
   "pools" : {
      "NetworkInterfaceTL-TaskExecutorPool-0" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
      },
      "NetworkInterfaceTL-TaskExecutorPool-1" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         }
      },
      "NetworkInterfaceTL-TaskExecutorPool-2" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         }
      },
      "NetworkInterfaceTL-TaskExecutorPool-3" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         }
      },
      "NetworkInterfaceTL-ShardRegistry" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "cfg2.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "cfg3.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "shard1.example.net:27018" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "shard2.example.net:27018" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         }
      },
      "global" : {
         "poolInUse" : <num>,
         "poolAvailable" : <num>,
         "poolLeased" : <num>,
         "poolCreated" : <num>,
         "poolRefreshing" : <num>,
         "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
         "cfg3.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "cfg1.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "cfg2.example.net:27019" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "shard2.example.net:27018" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         },
         "shard1.example.net:27018" : {
            "inUse" : <num>,
            "available" : <num>,
            "leased" : <num>,
            "created" : <num>,
            "refreshing" : <num>,
            "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
         }
      }
   },
   "hosts" : {
      "cfg3.example.net:27019" : {
         "inUse" : <num>,
         "available" : <num>,
         "leased" : <num>,
         "created" : <num>,
         "refreshing" : <num>,
         "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
      },
      "cfg1.example.net:27019" : {
         "inUse" : <num>,
         "available" : <num>,
         "leased" : <num>,
         "created" : <num>,
         "refreshing" : <num>,
         "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
      },
      "cfg2.example.net:27019" : {
         "inUse" : <num>,
         "available" : <num>,
         "leased" : <num>,
         "created" : <num>,
         "refreshing" : <num>,
         "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
      },
      "shard2.example.net:27018" : {
         "inUse" : <num>,
         "available" : <num>,
         "leased" : <num>,
         "created" : <num>,
         "refreshing" : <num>,
         "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
      },
      "shard1.example.net:27018" : {
         "inUse" : <num>,
         "available" : <num>,
         "leased" : <num>,
         "created" : <num>,
         "refreshing" : <num>,
         "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
      }
   },
   "replicaSets" : {
      "csRS" : {
         "hosts" : [
            {
               "addr" : "cfg1.example.net:27019",
               "ok" : <bool>,
               "ismaster" : <bool>,
               "hidden" : <bool>,
               "secondary" : <bool>,
               "pingTimeMillis" : <num>
            },
            {
               "addr" : "cfg2.example.net:27019",
               "ok" : <bool>,
               "ismaster" : <bool>,
               "hidden" : <bool>,
               "secondary" : <bool>,
               "pingTimeMillis" : <num>
            },
            {
               "addr" : "cfg3.example.net:27019",
               "ok" : <bool>,
               "ismaster" : <bool>,
               "hidden" : <bool>,
               "secondary" : <bool>,
               "pingTimeMillis" : <num>
            }
         ]
      },
      "shardB" : {
         "hosts" : [
            {
               "addr" : "shard2.example.net:27018",
               "ok" : <bool>,
               "ismaster" : <bool>,
               "hidden" : <bool>,
               "secondary" : <bool>,
               "pingTimeMillis" : <num>
            }
         ]
      },
      "shardA" : {
         "hosts" : [
            {
               "addr" : "shard1.example.net:27018",
               "ok" : <bool>,
               "ismaster" : <bool>,
               "hidden" : <bool>,
               "secondary" : <bool>,
               "pingTimeMillis" : <num>
            }
         ]
      }
   },
   "ok" : 1,
   "$clusterTime" : {
      "clusterTime" : <timestamp>,
      "signature" : <document>
   },
   "operationTime" : <timestamp>
}

输出

connPoolStats.totalAvailable

Reports the total number of available outgoing connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集.

connPoolStats.totalLeased

Reports the total number of connections borrowed from a pool and expected to return. These connections might not remain active through the duration of a lease, and are excluded from the related metrics. These connections are unavailble through the duration of the lease.

connPoolStats.totalCreated

Reports the total number of outgoing connections ever created by the current mongod / mongos instance to other members of the 分片集群 or 复制集.

connPoolStats.totalInUse

Reports the total number of outgoing connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集 that are currently in use.

connPoolStats.totalRefreshing

Reports the total number of outgoing connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集 that are currently being refreshed.

connPoolStats.totalWasNeverUsed

Reports the total number of outgoing connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集 that were closed having never been used.

connPoolStats.replicaSetMatchingStrategy

版本 5.0 中的新增功能。

On a mongos instance, this value reports the policy used by the instance to determine the minimum size limit of its connection pools to nodes within replica sets.

On a mongod instance, this value reports the policy used by the instance to determine the minimum size limit of its connection pools to nodes within other replica sets.

The policy for mongos and mongod can be set with the ShardingTaskExecutorPoolReplicaSetMatching parameter.

注意

If the ShardingTaskExecutorPoolReplicaSetMatching is set to "automatic", the replicaSetMatchingStrategy still describes the actual policy being used, not "automatic". To find the value of the ShardingTaskExecutorPoolReplicaSetMatching, use getParameter which returns the value of the server parameter:

db.adminCommand( { getParameter : 1, "ShardingTaskExecutorPoolReplicaSetMatching" : 1 } )
connPoolStats.acquisitionWaitTimes

6.3 版本中的新功能。

Document reports a histogram with the wait times for requests to acquire a connection from mongos to mongod:

  • The document contains time ranges in milliseconds and the number of connection requests in each range.

  • -inf is negative infinity and connection requests in the range (-inf, 0ms) did not wait.

  • inf is positive infinity and connection requests in the range [1000ms, inf) waited a time greater than or equal to 1,000 milliseconds.

  • totalCount is the total number of connection requests for all time ranges.

"acquisitionWaitTimes" : {
   "(-inf, 0ms)" : { "count" : <num> },
   "[0ms, 50ms)" : { "count" : <num> },
   "[50ms, 100ms)" : { "count" : <num> },
   "[100ms, 150ms)" : { "count" : <num> },
   "[150ms, 200ms)" : { "count" : <num> },
   "[200ms, 250ms)" : { "count" : <num> },
   "[250ms, 300ms)" : { "count" : <num> },
   "[300ms, 350ms)" : { "count" : <num> },
   "[350ms, 400ms)" : { "count" : <num> },
   "[400ms, 450ms)" : { "count" : <num> },
   "[450ms, 500ms)" : { "count" : <num> },
   "[500ms, 550ms)" : { "count" : <num> },
   "[550ms, 600ms)" : { "count" : <num> },
   "[600ms, 650ms)" : { "count" : <num> },
   "[650ms, 700ms)" : { "count" : <num> },
   "[700ms, 750ms)" : { "count" : <num> },
   "[750ms, 800ms)" : { "count" : <num> },
   "[800ms, 850ms)" : { "count" : <num> },
   "[850ms, 900ms)" : { "count" : <num> },
   "[900ms, 950ms)" : { "count" : <num> },
   "[950ms, 1000ms)" : { "count" : <num> },
   "[1000ms, inf)" : { "count" : <num> },
   "totalCount" : <num>
}
connPoolStats.numClientConnection

Reports the number of active and stored outgoing synchronous connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集.

These connections are a part of a pool that is a subset of the data reported by totalAvailable, totalCreated, and totalInUse。

connPoolStats.numAScopedConnection

Reports the number of active and stored outgoing scoped synchronous connections from the current mongod / mongos instance to other members of the 分片集群 or 复制集.

These connections are a part of a pool that is a subset of the data reported by totalAvailable, totalCreated, and totalInUse。

connPoolStats.pools

Reports on connection statistics (in use/available/created/refreshing) grouped by the connection pools. A mongod or mongos has two distinct families of outgoing connection pools:

  • DBClient-based pools (the "write path") and

  • NetworkInterfaceTL-based pools (the "read path").

For each pool, the command returns a document that resembles the following:

{
  "poolInUse" : <num>,
  "poolAvailable" : <num>,
  "poolLeased" : <num>,
  "poolCreated" : <num>,
  "poolRefreshing" : <num>,
  "acquisitionWaitTimes" : <document>,  // Added in MongoDB 6.3
  "[host1]" : {
     "inUse" : <num>, "available" : <num>, "leased" : <num>, "created" : <num>, "refreshing" : <num>,
     "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
  },
  "[host2]" : {
     "inUse" : <num>, "available" : <num>, "leased" : <num>, "created" : <num>, "refreshing" : <num>,
     "acquisitionWaitTimes" : <document>  // Added in MongoDB 6.3
  },
  ...
}

注意

If there are no connections (in use/available/created/refreshing) for a particular pool, the connPoolStats does not return statistics for that pool.

connPoolStats.pools.NetworkInterfaceTL-TaskExecutorPool-[n]

Displays connection statics related to TaskExecutor pools. Typically, there will be one TaskExecutorPool per core, e.g. pools.NetworkInterfaceTL-TaskExecutorPool-0 ... pools.NetworkInterfaceTL-TaskExecutorPool-7 for an 8-core processor.

另请参阅：

taskExecutorPoolSize

connPoolStats.pools.NetworkInterfaceTL-ShardRegistry

Available if the command is run on a member of a sharded cluster.

Displays the pool statistics for the connections between the current mongod / mongos instance and other members of the sharded cluster.

connPoolStats.pools.NetworkInterfaceTL-Replication

Available if the command is run on a member of a replica set.

Displays the pool statistics for the connections between the current mongod instance and the other members of the replica set.

connPoolStats.pools.global

Displays the DBClient-based pool statistics.

connPoolStats.pools.[pool].poolWasNeverUsed

Displays the number of connections in this connection pool that were closed having never been used.

connPoolStats.pools.[pool].acquisitionWaitTimes

6.3 版本中的新功能。

Reports the wait times for requests to acquire a connection from mongos to mongod. For details, see connPoolStats.acquisitionWaitTimes。

connPoolStats.hosts

Reports on connection statistics (in use/available/created/refreshing) grouped by the hosts.

Contains 文档 that represent a report of connections between the current mongod / mongos instance and each member of the 分片集群 or 复制集.

connPoolStats.hosts.[host].available

Reports the total number of connections available for connecting to the [host].

connPoolStats.hosts.[host].leased

Reports the total number of connections to the host borrowed from a pool and expected to return. These connections might not remain active through the duration of a lease, and are excluded from the related metrics. These connections are unavailble through the duration of the lease.

connPoolStats.hosts.[host].created

Reports the number of connections to the [host] ever created.

connPoolStats.hosts.[host].inUse

Reports the number of connections to the [host] that are currently in use.

connPoolStats.hosts.[host].wasNeverUsed

Reports the total number of outgoing connections from host to other members of the 分片集群 or 复制集 that were closed having never been used.

connPoolStats.hosts.[host].acquisitionWaitTimes

6.3 版本中的新功能。

Reports the wait times for requests to acquire a connection from mongos to mongod. For details, see connPoolStats.acquisitionWaitTimes。

connPoolStats.replicaSets

Contains 文档 that represent a report of information related to each replica set connected to the current mongod / mongos.

connPoolStats.replicaSets.replicaSet

Reports on each 复制集 connected to the current mongod / mongos.

connPoolStats.replicaSets.[replicaSets].hosts

Holds an array of 文档 that reports on each member in the 复制集.

These values derive from the replica set status values.

connPoolStats.replicaSets.[replicaSet].hosts[n].addr

Reports the address for the member in the 复制集 in [hostname]:[port] format.

connPoolStats.replicaSets.[replicaSet].hosts[n].ok

Reports false when:

  • the current mongos or mongod cannot connect to instance.

  • the current mongos or mongod received a connection exception or error.

This field is for internal use.

connPoolStats.replicaSets.[replicaSet].hosts[n].ismaster

Reports true if this host is the 主节点 member of the 复制集.

connPoolStats.replicaSets.[replicaSet].hosts[n].hidden

Reports true if this host is a 隐藏成员 of the 复制集.

connPoolStats.replicaSets.[replicaSet].hosts[n].secondary

Reports true if this host is a 从节点 member of the 复制集.

connPoolStats.replicaSets.[replicaSet].hosts[n].pingTimeMillis

Reports the ping time in milliseconds from the mongos or mongod to this host。

connPoolStats.replicaSets.[replicaSet].hosts[n].tags

Reports the members[n].tags, if this member of the set has tags configured.

有关 ok 状态字段、operationTime 字段和 $clusterTime 字段的详情，另请参阅响应。

host

后退

collStats

来年

connectionStatus