Uploaded image for project: 'Documentation'
  1. Documentation
  2. DOCS-12385

Docs for SERVER-38998: Create serverStatus metrics for readConcern and writeConcern

    XMLWordPrintableJSON

Details

    Description

      Description

      Description:

      The serverStatus sections described in the Description were added.

      Engineering Ticket Description:

      We will create new serverStatus sections:

       
      opReadConcernCounters: {
          available: <num>,
          linearizable: <num>,
          local: <num>,
          majority: <num>,
          snapshot: <num>,
          none: <num>
      }
      

      The sum of these counters should be opCounters.query (note that this means we will not include getMore commands, since these inherit the readConcern from the originating command).

      opWriteConcernCounters: {
          insert: {
              wmajority: <num>,
              wnum: {
                  "0": <num>,    // only generate these fields if they are used
                  "2": <num>,
                  ...
              },
              wtag: {
                  "tag1": <num>,    // only generate these fields if they are used
                  "tag2": <num>,
                  ...
              }
              none: <num>
          },
          update: {
              wmajority: <num>,
              wnum: {
                  "0": <num>,    // only generate these fields if they are used
                  "2": <num>,
                  ...
              },
              wtag: {
                  "tag1": <num>,    // only generate these fields if they are used
                  "tag2": <num>,
                  ...
              }
              none: <num>
          },
          delete: {
              wmajority: <num>,
              wnum: {
                  "0": <num>,    // only generate these fields if they are used
                  "2": <num>,
                  ...
              },
              wtag: {
                  "tag1": <num>,    // only generate these fields if they are used
                  "tag2": <num>,
                  ...
              }
              none: <num>
          }
      }
      

      The sum of the counters for opWriteConcernCounters.insert should be opcounters.insert, and similarly for the other operations. Note that the j value is ignored, so {{

      Unknown macro: {w}

      }} and {{

      Unknown macro: {w}

      }} are both counted in w1.

      Scope of changes

      since 4.0.6,
      just:

      • source/reference/command/serverStatus.txt
      • source/includes/extracts-server-status-projection-base.yaml

      Impact to Other Docs

      none - since new fields

      MVP (Work and Date)

      Resources (Scope or Design Docs, Invision, etc.)

      Attachments

        Activity

          People

            kay.kim@mongodb.com Kay Kim (Inactive)
            kay.kim@mongodb.com Kay Kim (Inactive)
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:
              4 years, 40 weeks, 4 days ago