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Comandos de banco de dados

Diagnóstico

lockInfo

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Definição
Compatibilidade
Sintaxe
Exemplo de saída
Campos de Saída

Definição

lockInfo: Returns information on locks that are currently being held or pending. lockInfo is an internal command available on mongod instances only.

Compatibilidade

Esse comando está disponível em implantações hospedadas nos seguintes ambientes:

MongoDB Atlas: o serviço totalmente gerenciado para implantações do MongoDB na nuvem

Importante

Esse comando não é suportado em clusters M,0 M,2 M5 e Flex. Para obter mais informações, consulte Comandos não suportados.

MongoDB Enterprise: a versão autogerenciada e baseada em assinatura do MongoDB
MongoDB Community: uma versão com código disponível, de uso gratuito e autogerenciada do MongoDB

Sintaxe

O comando tem a seguinte sintaxe:

db.adminCommand(
   {
     lockInfo: 1
   }
)

Exemplo de saída

The following is an example of the output from the lockInfo:

{
   "lockInfo" : [
      {
         "resourceId" : "{2305843009213693953: ParallelBatchWriterMode, 1}",
         "granted" : [
            {
               "mode" : "IS",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
               "clientInfo" : {
                  "desc" : "conn3",
                  "connectionId" : 3,
                  "client" : "127.0.0.1:55165",
                  "opid" : 28770
               }
            }
         ],
         "pending" : [ ]
      },
      {
         "resourceId" : "{6917529027641081857: Global, 1}",
         "granted" : [
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
               "clientInfo" : {
                  "desc" : "conn3",
                  "connectionId" : 3,
                  "client" : "127.0.0.1:55165",
                  "opid" : 28770
               }
            },
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
               "clientInfo" : {
                  "desc" : "IndexBuildsCoordinatorMongod-0",
                  "opid" : 27437
               }
            }
         ],
         "pending" : [ ]
      },
      {
         "resourceId" : "{4611686018427387905: ReplicationStateTransition, 1}",
         "granted" : [
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
               "clientInfo" : {
                  "desc" : "conn3",
                  "connectionId" : 3,
                  "client" : "127.0.0.1:55165",
                  "opid" : 28770
               }
            },
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
               "clientInfo" : {
                  "desc" : "IndexBuildsCoordinatorMongod-0",
                  "opid" : 27437
               }
            }
         ],
         "pending" : [ ]
      },
      {
         "resourceId" : "{10123292395995783581: Database, 899920359141007773, test}",
         "granted" : [
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
               "clientInfo" : {
                  "desc" : "conn3",
                  "connectionId" : 3,
                  "client" : "127.0.0.1:55165",
                  "opid" : 28770
               }
            },
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
               "clientInfo" : {
                  "desc" : "IndexBuildsCoordinatorMongod-0",
                  "opid" : 27437
               }
            }
         ],
         "pending" : [ ]
      },
      {
         "resourceId" : "{12576221391967629173: Collection, 1047006345899159413, test.hugeindex}",
         "granted" : [
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "{ findandmodify: \"hugeindex\", query: { _id: 585.0 }, update: { $pop: { a: 1.0 } }, upsert: false, new: false, lsid: { id: UUID(\"dc611138-04c6-49b1-a7ac-161040dd9d65\") }, $db: \"test\" }",
               "clientInfo" : {
                  "desc" : "conn3",
                  "connectionId" : 3,
                  "client" : "127.0.0.1:55165",
                  "opid" : 28770
               }
            },
            {
               "mode" : "IX",
               "convertMode" : "NONE",
               "enqueueAtFront" : false,
               "compatibleFirst" : false,
               "debugInfo" : "index build: 29d48366-63ad-41e2-a689-69255a89c094",
               "clientInfo" : {
                  "desc" : "IndexBuildsCoordinatorMongod-0",
                  "opid" : 27437
               }
            }
         ],
         "pending" : [ ]
      }
   ],
   "ok" : 1
}

Campos de Saída

lockInfo

An array of documents that report on the lock information. Each document includes:

resourceId
granted
pending

lockInfo.resourceId: The resource on which the locks are being held or pending.

lockInfo.granted: An array of documents. Each document provides information on locks that are currently granted on the resource.

lockInfo.pending: An array of documents. Each document provides information on locks that are currently pending on the resource.

Lock Information

For each granted or pending lock document, information include:

Campo

Descrição

mode

Specifies the lock mode:

Modo de bloqueio	Descrição
`S`	Shared
`X`	Exclusive
`IS`	Intent Shared
`IX`	Intent Exclusive (IX)

convertMode

Specifies the new lock mode for conversion.

enqueueAtFront

A boolean that indicates whether to put the lock at the front of the queue or the back in case of conflict.

compatibleFirst

A boolean that indicates to grant lock requests based on compatibility with already granted locks or to use the first-in-first-out (FIFO) order.

debugInfo

Information about the operation that issued the lock request.

clientInfo

A document detailing the client information.

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