ArangoDB v3.10 reached End of Life (EOL) and is no longer supported.

This documentation is outdated. Please see the most recent stable version.

Statistics

Server statistics let you monitor the system but they are superseded by the more detailed server metrics

Get the statistics

GET /_admin/statistics

This endpoint should no longer be used. It is deprecated from version 3.8.0 on. Use /_admin/metrics/v2 instead, which provides the data exposed by this API and a lot more.

Returns the statistics information. The returned object contains the statistics figures grouped together according to the description returned by /_admin/statistics-description. For instance, to access a figure userTime from the group system, you first select the sub-object describing the group stored in system and in that sub-object the value for userTime is stored in the attribute of the same name.

In case of a distribution, the returned object contains the total count in count and the distribution list in counts. The sum (or total) of the individual values is returned in sum.

The transaction statistics show the local started, committed and aborted transactions as well as intermediate commits done for the server queried. The intermediate commit count will only take non zero values for the RocksDB storage engine. Coordinators do almost no local transactions themselves in their local databases, therefor cluster transactions (transactions started on a Coordinator that require DB-Servers to finish before the transactions is committed cluster wide) are just added to their local statistics. This means that the statistics you would see for a single server is roughly what you can expect in a cluster setup using a single Coordinator querying this Coordinator. Just with the difference that cluster transactions have no notion of intermediate commits and will not increase the value.

Responses

200 OK
Statistics were returned successfully.
- client* object
  information about the connected clients and their resource usage
  bytesReceived* object
  number of bytes received from the clients
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  bytesSent* object
  number of bytes sent to the clients
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  connectionTime* object
  total connection times
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  httpConnections* integer
  the number of open http connections
  ioTime* object
  IO Time
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  queueTime* object
  the time requests were queued waiting for processing
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  requestTime* object
  the request times
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
  totalTime* object
  the system time
  count* integer
  number of values summarized
  counts* array of integers
  array containing the values
  sum* number
  summarized value of all counts
- code* integer
  the HTTP status code - 200 in this case
- enabled* boolean
  true if the server has the statistics module enabled. If not, don’t expect any values.
- error* boolean
  boolean flag to indicate whether an error occurred (false in this case)
- errorMessage* string
  a descriptive error message
- http* object
  the numbers of requests by Verb
  requestsAsync* integer
  total number of asynchronous http requests
  requestsDelete* integer
  No of requests using the DELETE-verb
  requestsGet* integer
  No of requests using the GET-verb
  requestsHead* integer
  No of requests using the HEAD-verb
  requestsOptions* integer
  No of requests using the OPTIONS-verb
  requestsOther* integer
  No of requests using the none of the above identified verbs
  requestsPatch* integer
  No of requests using the PATCH-verb
  requestsPost* integer
  No of requests using the POST-verb
  requestsPut* integer
  No of requests using the PUT-verb
  requestsTotal* integer
  total number of http requests
- server* object
  statistics of the server
  physicalMemory* integer
  available physical memory on the server
  threads* object
  Statistics about the server worker threads (excluding V8 specific or jemalloc specific threads and system threads)
  in-progress* integer
  The number of currently busy worker threads
  queued* integer
  The number of jobs queued up waiting for worker threads becoming available
  scheduler-threads* integer
  The number of spawned worker threads
  transactions* object
  Statistics about transactions
  aborted* integer
  the number of aborted transactions
  committed* integer
  the number of committed transactions
  intermediateCommits* integer
  the number of intermediate commits done
  started* integer
  the number of started transactions
  uptime* integer
  time the server is up and running
  v8Context* object
  Statistics about the V8 javascript contexts
  available* integer
  the number of currently spawned V8 contexts
  busy* integer
  the number of currently active V8 contexts
  dirty* integer
  the number of contexts that were previously used, and should now be garbage collected before being re-used
  free* integer
  the number of V8 contexts that are free to use
  max* integer
  the maximum number of V8 concurrent contexts we may spawn as configured by --javascript.v8-contexts
  memory* array of objects
  a list of V8 memory / garbage collection watermarks; Refreshed on every garbage collection run; Preserves min/max memory used at that time for 10 seconds
  contextId* integer
  ID of the context this set of memory statistics is from
  countOfTimes* integer
  how many times was the garbage collection run in these 10 seconds
  heapMax* integer
  High watermark of all garbage collection runs in 10 seconds
  heapMin* integer
  Low watermark of all garbage collection runs in these 10 seconds
  tMax* number
  the timestamp where the 10 seconds interval started
  min* integer
  the minimum number of V8 contexts that are spawned as configured by --javascript.v8-contexts-minimum
- system* object
  metrics gathered from the system about this process; may depend on the host OS
  majorPageFaults* integer
  pagefaults
  minorPageFaults* integer
  pagefaults
  numberOfThreads* integer
  the number of threads in the server
  residentSize* integer
  RSS of process
  residentSizePercent* number
  RSS of process in %
  systemTime* number
  the system CPU time used by the server process
  userTime* number
  the user CPU time used by the server process
  virtualSize* integer
  VSS of the process
- time* integer
  the current server timestamp
404 Not Found
Statistics are disabled on the instance.

Examples

curl --header 'accept: application/json' --dump - http://localhost:8529/_admin/statistics

Show output

HTTP/1.1 200 OK
content-type: application/json
cache-control: no-cache, no-store, must-revalidate, pre-check=0, post-check=0, max-age=0, s-maxage=0
connection: Keep-Alive
content-length: 2341
content-security-policy: frame-ancestors 'self'; form-action 'self';
expires: 0
pragma: no-cache
server: ArangoDB
strict-transport-security: max-age=31536000 ; includeSubDomains
x-arango-queue-time-seconds: 0.000000
x-content-type-options: nosniff

{ 
  "time" : 1712247111.722344, 
  "enabled" : true, 
  "system" : { 
    "minorPageFaults" : 171533, 
    "majorPageFaults" : 16, 
    "userTime" : 6.15, 
    "systemTime" : 2.03, 
    "numberOfThreads" : 48, 
    "residentSize" : 306606080, 
    "residentSizePercent" : 0.00926128579631407, 
    "virtualSize" : 1400807424 
  }, 
  "client" : { 
    "httpConnections" : 1, 
    "connectionTime" : { 
      "sum" : 0, 
      "count" : 0, 
      "counts" : [ 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "totalTime" : { 
      "sum" : 0.8908450603485107, 
      "count" : 1176, 
      "counts" : [ 
        1161, 
        11, 
        4, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "requestTime" : { 
      "sum" : 0.6453695297241211, 
      "count" : 1176, 
      "counts" : [ 
        1165, 
        8, 
        3, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "queueTime" : { 
      "sum" : 0.17308831214904785, 
      "count" : 1176, 
      "counts" : [ 
        1172, 
        3, 
        1, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "ioTime" : { 
      "sum" : 0.0723872184753418, 
      "count" : 1176, 
      "counts" : [ 
        1176, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "bytesSent" : { 
      "sum" : 999875, 
      "count" : 1176, 
      "counts" : [ 
        6, 
        1063, 
        70, 
        34, 
        1, 
        2 
      ] 
    }, 
    "bytesReceived" : { 
      "sum" : 273991, 
      "count" : 1176, 
      "counts" : [ 
        796, 
        380, 
        0, 
        0, 
        0, 
        0 
      ] 
    } 
  }, 
  "clientUser" : { 
    "httpConnections" : 1, 
    "connectionTime" : { 
      "sum" : 0, 
      "count" : 0, 
      "counts" : [ 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "totalTime" : { 
      "sum" : 0.8908450603485107, 
      "count" : 1176, 
      "counts" : [ 
        1161, 
        11, 
        4, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "requestTime" : { 
      "sum" : 0.6453695297241211, 
      "count" : 1176, 
      "counts" : [ 
        1165, 
        8, 
        3, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "queueTime" : { 
      "sum" : 0.17308831214904785, 
      "count" : 1176, 
      "counts" : [ 
        1172, 
        3, 
        1, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "ioTime" : { 
      "sum" : 0.0723872184753418, 
      "count" : 1176, 
      "counts" : [ 
        1176, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0, 
        0 
      ] 
    }, 
    "bytesSent" : { 
      "sum" : 999875, 
      "count" : 1176, 
      "counts" : [ 
        6, 
        1063, 
        70, 
        34, 
        1, 
        2 
      ] 
    }, 
    "bytesReceived" : { 
      "sum" : 273991, 
      "count" : 1176, 
      "counts" : [ 
        796, 
        380, 
        0, 
        0, 
        0, 
        0 
      ] 
    } 
  }, 
  "http" : { 
    "requestsTotal" : 1176, 
    "requestsSuperuser" : 0, 
    "requestsUser" : 1176, 
    "requestsAsync" : 6, 
    "requestsGet" : 310, 
    "requestsHead" : 0, 
    "requestsPost" : 733, 
    "requestsPut" : 27, 
    "requestsPatch" : 3, 
    "requestsDelete" : 103, 
    "requestsOptions" : 0, 
    "requestsOther" : 0 
  }, 
  "server" : { 
    "uptime" : 35.08609676361084, 
    "physicalMemory" : 33106210816, 
    "transactions" : { 
      "started" : 873, 
      "aborted" : 87, 
      "committed" : 1144, 
      "intermediateCommits" : 0, 
      "readOnly" : 459, 
      "dirtyReadOnly" : 0 
    }, 
    "v8Context" : { 
      "available" : 3, 
      "busy" : 2, 
      "dirty" : 0, 
      "free" : 1, 
      "max" : 28, 
      "min" : 1, 
      "memory" : [ 
        { 
          "contextId" : 0, 
          "tMax" : 1712247077.0117433, 
          "countOfTimes" : 8, 
          "heapMax" : 14967552, 
          "heapMin" : 0, 
          "invocations" : 36 
        }, 
        { 
          "contextId" : 1, 
          "tMax" : 1712247108.9015393, 
          "countOfTimes" : 8, 
          "heapMax" : 14992848, 
          "heapMin" : 0, 
          "invocations" : 3 
        }, 
        { 
          "contextId" : 2, 
          "tMax" : 1712247109.3428097, 
          "countOfTimes" : 8, 
          "heapMax" : 15011192, 
          "heapMin" : 0, 
          "invocations" : 16 
        } 
      ] 
    }, 
    "threads" : { 
      "scheduler-threads" : 6, 
      "blocked" : 0, 
      "queued" : 3, 
      "in-progress" : 3, 
      "direct-exec" : 0 
    } 
  }, 
  "error" : false, 
  "code" : 200 
}

Get the statistics description

GET /_admin/statistics-description

This endpoint should no longer be used. It is deprecated from version 3.8.0 on. Use /_admin/metrics/v2 instead, which provides the data exposed by the statistics API and a lot more.

Returns a description of the statistics returned by /_admin/statistics. The returned objects contains an array of statistics groups in the attribute groups and an array of statistics figures in the attribute figures.

A statistics group is described by

group: The identifier of the group.
name: The name of the group.
description: A description of the group.

A statistics figure is described by

group: The identifier of the group to which this figure belongs.
identifier: The identifier of the figure. It is unique within the group.
name: The name of the figure.
description: A description of the figure.
type: Either current, accumulated, or distribution.
cuts: The distribution vector.
units: Units in which the figure is measured.

Responses

200 OK
Description was returned successfully.
- code* integer
  the HTTP status code
- error* boolean
  the error, false in this case
- figures* array of objects
  A statistics figure
  cuts* string
  The distribution vector.
  description* string
  A description of the figure.
  group* string
  The identifier of the group to which this figure belongs.
  identifier* string
  The identifier of the figure. It is unique within the group.
  name* string
  The name of the figure.
  type* string
  Either current, accumulated, or distribution.
  units* string
  Units in which the figure is measured.
- groups* array of objects
  A statistics group
  description* string
  A description of the group.
  group* string
  The identifier of the group.
  name* string
  The name of the group.

Examples

curl --header 'accept: application/json' --dump - http://localhost:8529/_admin/statistics-description

Show output

HTTP/1.1 200 OK
content-type: application/json
cache-control: no-cache, no-store, must-revalidate, pre-check=0, post-check=0, max-age=0, s-maxage=0
connection: Keep-Alive
content-length: 7892
content-security-policy: frame-ancestors 'self'; form-action 'self';
expires: 0
pragma: no-cache
server: ArangoDB
strict-transport-security: max-age=31536000 ; includeSubDomains
x-arango-queue-time-seconds: 0.000000
x-content-type-options: nosniff

{ 
  "groups" : [ 
    { 
      "group" : "system", 
      "name" : "Process Statistics", 
      "description" : "Statistics about the ArangoDB process" 
    }, 
    { 
      "group" : "client", 
      "name" : "Client Connection Statistics", 
      "description" : "Statistics about the connections." 
    }, 
    { 
      "group" : "clientUser", 
      "name" : "Client User Connection Statistics", 
      "description" : "Statistics about the connections, only user traffic (ignoring superuser JWT traffic)." 
    }, 
    { 
      "group" : "http", 
      "name" : "HTTP Request Statistics", 
      "description" : "Statistics about the HTTP requests." 
    }, 
    { 
      "group" : "server", 
      "name" : "Server Statistics", 
      "description" : "Statistics about the ArangoDB server" 
    } 
  ], 
  "figures" : [ 
    { 
      "group" : "system", 
      "identifier" : "userTime", 
      "name" : "User Time", 
      "description" : "Amount of time that this process has been scheduled in user mode, measured in seconds.", 
      "type" : "accumulated", 
      "units" : "seconds" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "systemTime", 
      "name" : "System Time", 
      "description" : "Amount of time that this process has been scheduled in kernel mode, measured in seconds.", 
      "type" : "accumulated", 
      "units" : "seconds" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "numberOfThreads", 
      "name" : "Number of Threads", 
      "description" : "Number of threads in the arangod process.", 
      "type" : "current", 
      "units" : "number" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "residentSize", 
      "name" : "Resident Set Size", 
      "description" : "The total size of the number of pages the process has in real memory. This is just the pages which count toward text, data, or stack space. This does not include pages which have not been demand-loaded in, or which are swapped out. The resident set size is reported in bytes.", 
      "type" : "current", 
      "units" : "bytes" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "residentSizePercent", 
      "name" : "Resident Set Size", 
      "description" : "The percentage of physical memory used by the process as resident set size.", 
      "type" : "current", 
      "units" : "percent" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "virtualSize", 
      "name" : "Virtual Memory Size", 
      "description" : "On Windows, this figure contains the total amount of memory that the memory manager has committed for the arangod process. On other systems, this figure contains The size of the virtual memory the process is using.", 
      "type" : "current", 
      "units" : "bytes" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "minorPageFaults", 
      "name" : "Minor Page Faults", 
      "description" : "The number of minor faults the process has made which have not required loading a memory page from disk. This figure is not reported on Windows.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "system", 
      "identifier" : "majorPageFaults", 
      "name" : "Major Page Faults", 
      "description" : "On Windows, this figure contains the total number of page faults. On other system, this figure contains the number of major faults the process has made which have required loading a memory page from disk.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "httpConnections", 
      "name" : "Client Connections", 
      "description" : "The number of connections that are currently open.", 
      "type" : "current", 
      "units" : "number" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "totalTime", 
      "name" : "Total Time", 
      "description" : "Total time needed to answer a request.", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "requestTime", 
      "name" : "Request Time", 
      "description" : "Request time needed to answer a request.", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "queueTime", 
      "name" : "Queue Time", 
      "description" : "Queue time needed to answer a request.", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "bytesSent", 
      "name" : "Bytes Sent", 
      "description" : "Bytes sents for a request.", 
      "type" : "distribution", 
      "cuts" : [ 
        250, 
        1000, 
        2000, 
        5000, 
        10000 
      ], 
      "units" : "bytes" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "bytesReceived", 
      "name" : "Bytes Received", 
      "description" : "Bytes received for a request.", 
      "type" : "distribution", 
      "cuts" : [ 
        250, 
        1000, 
        2000, 
        5000, 
        10000 
      ], 
      "units" : "bytes" 
    }, 
    { 
      "group" : "client", 
      "identifier" : "connectionTime", 
      "name" : "Connection Time", 
      "description" : "Total connection time of a client.", 
      "type" : "distribution", 
      "cuts" : [ 
        0.1, 
        1, 
        60 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "httpConnections", 
      "name" : "Client Connections", 
      "description" : "The number of connections that are currently open (only user traffic).", 
      "type" : "current", 
      "units" : "number" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "totalTime", 
      "name" : "Total Time", 
      "description" : "Total time needed to answer a request (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "requestTime", 
      "name" : "Request Time", 
      "description" : "Request time needed to answer a request (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "queueTime", 
      "name" : "Queue Time", 
      "description" : "Queue time needed to answer a request (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        0.01, 
        0.05, 
        0.1, 
        0.2, 
        0.5, 
        1, 
        5, 
        15, 
        30 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "bytesSent", 
      "name" : "Bytes Sent", 
      "description" : "Bytes sents for a request (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        250, 
        1000, 
        2000, 
        5000, 
        10000 
      ], 
      "units" : "bytes" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "bytesReceived", 
      "name" : "Bytes Received", 
      "description" : "Bytes received for a request (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        250, 
        1000, 
        2000, 
        5000, 
        10000 
      ], 
      "units" : "bytes" 
    }, 
    { 
      "group" : "clientUser", 
      "identifier" : "connectionTime", 
      "name" : "Connection Time", 
      "description" : "Total connection time of a client (only user traffic).", 
      "type" : "distribution", 
      "cuts" : [ 
        0.1, 
        1, 
        60 
      ], 
      "units" : "seconds" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsTotal", 
      "name" : "Total requests", 
      "description" : "Total number of HTTP requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsSuperuser", 
      "name" : "Total superuser requests", 
      "description" : "Total number of HTTP requests executed by superuser/JWT.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsUser", 
      "name" : "Total user requests", 
      "description" : "Total number of HTTP requests executed by clients.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsAsync", 
      "name" : "Async requests", 
      "description" : "Number of asynchronously executed HTTP requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsGet", 
      "name" : "HTTP GET requests", 
      "description" : "Number of HTTP GET requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsHead", 
      "name" : "HTTP HEAD requests", 
      "description" : "Number of HTTP HEAD requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsPost", 
      "name" : "HTTP POST requests", 
      "description" : "Number of HTTP POST requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsPut", 
      "name" : "HTTP PUT requests", 
      "description" : "Number of HTTP PUT requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsPatch", 
      "name" : "HTTP PATCH requests", 
      "description" : "Number of HTTP PATCH requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsDelete", 
      "name" : "HTTP DELETE requests", 
      "description" : "Number of HTTP DELETE requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsOptions", 
      "name" : "HTTP OPTIONS requests", 
      "description" : "Number of HTTP OPTIONS requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "http", 
      "identifier" : "requestsOther", 
      "name" : "other HTTP requests", 
      "description" : "Number of other HTTP requests.", 
      "type" : "accumulated", 
      "units" : "number" 
    }, 
    { 
      "group" : "server", 
      "identifier" : "uptime", 
      "name" : "Server Uptime", 
      "description" : "Number of seconds elapsed since server start.", 
      "type" : "current", 
      "units" : "seconds" 
    }, 
    { 
      "group" : "server", 
      "identifier" : "physicalMemory", 
      "name" : "Physical Memory", 
      "description" : "Physical memory in bytes.", 
      "type" : "current", 
      "units" : "bytes" 
    } 
  ], 
  "error" : false, 
  "code" : 200 
}