lockInfo

項目一覧

定義
互換性
構文
出力例
出力フィールド

定義

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

互換性

このコマンドは、次の環境でホストされている配置で使用できます。

MongoDB Atlas はクラウドでの MongoDB 配置のためのフルマネージドサービスです

重要

このコマンドは、M0、M2、M5、および Flex クラスターではサポートされていません。詳細については、「サポートされていないコマンド」を参照してください。

MongoDB Enterprise: サブスクリプションベースの自己管理型 MongoDB バージョン
MongoDB Community: ソースが利用可能で、無料で使用できる自己管理型の MongoDB のバージョン

構文

このコマンドの構文は、次のとおりです。

db.adminCommand(
   {
     lockInfo: 1
   }
)

出力例

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
}

出力フィールド

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:

フィールド

説明

mode

Specifies the lock mode:

ロックモード	説明
`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.

戻る

listCommands

ping