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  1. Core Server
  2. SERVER-21597

Fix connPoolStats command to work with many TaskExecutor-NetworkInterface pairs

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: 3.2.0-rc4
    • Fix Version/s: 3.2.3, 3.3.0
    • Component/s: Networking
    • Labels:
    • Backwards Compatibility:
      Minor Change
    • Operating System:
      ALL
    • Backport Completed:
    • Sprint:
      Platform D (12/11/15), Platforms E (01/08/16)

      Description

      With the completion of SERVER-20944 the results of the connPoolStats command are no longer correct. The command must be changed to collect statistics from all executors in the TaskExecutor pool, for sharded systems. Rather than reporting on each connection pool individually, since many of these pools are sharing workloads, connPoolStats should aggregate and report information from all connection pools within the server.

      This work changes the output format of the command to the following:

      {
              "numClientConnections" : 22,
              "numAScopedConnections" : 0,
              "totalInUse" : 1,
              "totalAvailable" : 2,
              "totalCreated" : 3,
              "hosts" : {
                      "localhost:27018" : {
                              "inUse" : 0,
                              "available" : 2,
                              "created" : 2
                      },
                      "localhost:27017" : {
                              "inUse" : 1,
                              "available" : 0,
                              "created" : 1
                      }
              },
              "replicaSets" : {
              },
              "ok" : 1
      }
      

      This new format is similar to the 3.0 formatting, but differs in the following ways:

      • the reported stats are aggregated across all connection pools in the server
      • the createdByType field has been removed (see SERVER-20283)
      • a new field, totalInUse, reports the number of connections currently in use across all pools
      • within each host's stats, the new inUse field reports the number of connections currently in use across all pools for this particular host

      SERVER-21674 documents a possible future feature to report connection stats separately for each connection pool instead of aggregating these statistics.

        Issue Links

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          xgen-internal-githook Githook User added a comment -

          Author:

          {u'username': u'samantharitter', u'name': u'samantharitter', u'email': u'samantha.ritter@10gen.com'}

          Message: SERVER-21597 Fix connPoolStats to work with many NetworkInterfaces
          Branch: master
          https://github.com/mongodb/mongo/commit/7c67e25f37853c60c106d2cf08eca1b81c4133ae

          Show
          xgen-internal-githook Githook User added a comment - Author: {u'username': u'samantharitter', u'name': u'samantharitter', u'email': u'samantha.ritter@10gen.com'} Message: SERVER-21597 Fix connPoolStats to work with many NetworkInterfaces Branch: master https://github.com/mongodb/mongo/commit/7c67e25f37853c60c106d2cf08eca1b81c4133ae
          Hide
          xgen-internal-githook Githook User added a comment -

          Author:

          {u'username': u'samantharitter', u'name': u'samantharitter', u'email': u'samantha.ritter@10gen.com'}

          Message: SERVER-21597 Fix connPoolStats to work with many NetworkInterfaces

          (cherry picked from commit 7c67e25f37853c60c106d2cf08eca1b81c4133ae)
          Branch: v3.2
          https://github.com/mongodb/mongo/commit/c96e8cacf35cf327ba7061cc1aaba997a566a300

          Show
          xgen-internal-githook Githook User added a comment - Author: {u'username': u'samantharitter', u'name': u'samantharitter', u'email': u'samantha.ritter@10gen.com'} Message: SERVER-21597 Fix connPoolStats to work with many NetworkInterfaces (cherry picked from commit 7c67e25f37853c60c106d2cf08eca1b81c4133ae) Branch: v3.2 https://github.com/mongodb/mongo/commit/c96e8cacf35cf327ba7061cc1aaba997a566a300

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              • Created:
                Updated:
                Resolved:

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