1.获取当前全部配置信息

• db.runCommand( { getParameter : ‘*’ } )

use admin
// 获取全部配置信息
db.runCommand( { getParameter : '*' } )
{"AsyncRequestsSenderUseBaton" : true,"KeysRotationIntervalSec" : 7776000,"ShardingTaskExecutorPoolHostTimeoutMS" : 300000,"ShardingTaskExecutorPoolMaxConnecting" : 2,"ShardingTaskExecutorPoolMaxSize" : -1,"ShardingTaskExecutorPoolMinSize" : 1,"ShardingTaskExecutorPoolRefreshRequirementMS" : 60000,"ShardingTaskExecutorPoolRefreshTimeoutMS" : 20000,"TransactionRecordMinimumLifetimeMinutes" : 30,"adaptiveServiceExecutorIdlePctThreshold" : 60,"adaptiveServiceExecutorMaxQueueLatencyMicros" : 500,"adaptiveServiceExecutorRecursionLimit" : 8,"adaptiveServiceExecutorReservedThreads" : -1,"adaptiveServiceExecutorRunTimeJitterMillis" : 500,"adaptiveServiceExecutorRunTimeMillis" : 5000,"adaptiveServiceExecutorStuckThreadTimeoutMillis" : 250,"allowSecondaryReadsDuringBatchApplication" : true,"authSchemaVersion" : 5,"authenticationMechanisms" : ["MONGODB-X509","SCRAM-SHA-1","SCRAM-SHA-256"],"bgSyncOplogFetcherBatchSize" : 13981010,"clientCursorMonitorFrequencySecs" : 4,"cloudFreeMonitoringEndpointURL" : "https://cloud.mongodb.com/freemonitoring/mongo","clusterAuthMode" : "keyFile","collectionClonerBatchSize" : -1,"connPoolMaxConnsPerHost" : 200,"connPoolMaxInUseConnsPerHost" : 2147483647,"connPoolMaxShardedConnsPerHost" : 200,"connPoolMaxShardedInUseConnsPerHost" : 2147483647,"createRollbackDataFiles" : true,"createTimestampSafeUniqueIndex" : false,"cursorTimeoutMillis" : NumberLong(600000),"debugCollectionUUIDs" : false,"diagnosticDataCollectionDirectorySizeMB" : 200,"diagnosticDataCollectionEnabled" : true,"diagnosticDataCollectionFileSizeMB" : 10,"diagnosticDataCollectionPeriodMillis" : 1000,"diagnosticDataCollectionSamplesPerChunk" : 300,"diagnosticDataCollectionSamplesPerInterimUpdate" : 10,"disableJavaScriptJIT" : true,"disableLogicalSessionCacheRefresh" : false,"disableNonSSLConnectionLogging" : false,"disabledSecureAllocatorDomains" : [ ],"enableElectionHandoff" : true,"enableInMemoryTransactions" : false,"enableLocalhostAuthBypass" : true,"enableTestCommands" : false,"failIndexKeyTooLong" : true,"featureCompatibilityVersion" : {"version" : "4.0"},"forceRollbackViaRefetch" : false,"globalConnPoolIdleTimeoutMinutes" : 2147483647,"heapProfilingEnabled" : false,"heapProfilingSampleIntervalBytes" : NumberLong(262144),"honorSystemUmask" : false,"initialSyncOplogBuffer" : "collection","initialSyncOplogBufferPeekCacheSize" : 10000,"initialSyncOplogFetcherBatchSize" : 13981010,"internalDocumentSourceCursorBatchSizeBytes" : 4194304,"internalDocumentSourceLookupCacheSizeBytes" : 104857600,"internalGeoNearQuery2DMaxCoveringCells" : 16,"internalGeoPredicateQuery2DMaxCoveringCells" : 16,"internalInsertMaxBatchSize" : 64,"internalProhibitShardOperationRetry" : false,"internalQueryAlwaysMergeOnPrimaryShard" : false,"internalQueryCacheEvictionRatio" : 10,"internalQueryCacheFeedbacksStored" : 20,"internalQueryCacheSize" : 5000,"internalQueryEnumerationMaxIntersectPerAnd" : 3,"internalQueryEnumerationMaxOrSolutions" : 10,"internalQueryExecMaxBlockingSortBytes" : 33554432,"internalQueryExecYieldIterations" : 128,"internalQueryExecYieldPeriodMS" : 10,"internalQueryFacetBufferSizeBytes" : 104857600,"internalQueryForceIntersectionPlans" : false,"internalQueryIgnoreUnknownJSONSchemaKeywords" : false,"internalQueryMaxScansToExplode" : 200,"internalQueryPlanEvaluationCollFraction" : 0.3,"internalQueryPlanEvaluationMaxResults" : 101,"internalQueryPlanEvaluationWorks" : 10000,"internalQueryPlanOrChildrenIndependently" : true,"internalQueryPlannerEnableHashIntersection" : false,"internalQueryPlannerEnableIndexIntersection" : true,"internalQueryPlannerGenerateCoveredWholeIndexScans" : false,"internalQueryPlannerMaxIndexedSolutions" : 64,"internalQueryProhibitBlockingMergeOnMongoS" : false,"internalQueryProhibitMergingOnMongoS" : false,"internalQueryS2GeoCoarsestLevel" : 0,"internalQueryS2GeoFinestLevel" : 23,"internalQueryS2GeoMaxCells" : 20,"internalValidateFeaturesAsMaster" : true,"javascriptProtection" : false,"journalCommitInterval" : 0,"jsHeapLimitMB" : 1100,"localLogicalSessionTimeoutMinutes" : 30,"logComponentVerbosity" : {"verbosity" : 0,"accessControl" : {"verbosity" : -1},"command" : {"verbosity" : -1},"control" : {"verbosity" : -1},"executor" : {"verbosity" : -1},"geo" : {"verbosity" : -1},"index" : {"verbosity" : -1},"network" : {"verbosity" : -1,"asio" : {"verbosity" : -1},"bridge" : {"verbosity" : -1}},"query" : {"verbosity" : -1},"replication" : {"verbosity" : -1,"heartbeats" : {"verbosity" : -1},"rollback" : {"verbosity" : -1}},"sharding" : {"verbosity" : -1,"shardingCatalogRefresh" : {"verbosity" : -1}},"storage" : {"verbosity" : -1,"recovery" : {"verbosity" : -1},"journal" : {"verbosity" : -1}},"write" : {"verbosity" : -1},"ftdc" : {"verbosity" : -1},"tracking" : {"verbosity" : -1},"transaction" : {"verbosity" : -1}},"logLevel" : 0,"logicalSessionRefreshMillis" : 300000,"maxAcceptableLogicalClockDriftSecs" : NumberLong(31536000),"maxBSONDepth" : 200,"maxIndexBuildMemoryUsageMegabytes" : 500,"maxLogSizeKB" : 10,"maxNumInitialSyncCollectionClonerCursors" : 1,"maxSessions" : 1000000,"maxSyncSourceLagSecs" : 30,"maxTransactionLockRequestTimeoutMillis" : 5,"migrateCloneInsertionBatchDelayMS" : 0,"migrateCloneInsertionBatchSize" : 0,"newCollectionsUsePowerOf2Sizes" : true,"notablescan" : false,"numInitialSyncAttempts" : 10,"numInitialSyncCollectionCountAttempts" : 3,"numInitialSyncCollectionFindAttempts" : 3,"numInitialSyncConnectAttempts" : 10,"numInitialSyncListCollectionsAttempts" : 3,"numInitialSyncListDatabasesAttempts" : 3,"numInitialSyncListIndexesAttempts" : 3,"numInitialSyncOplogFindAttempts" : 3,"opensslCipherConfig" : "","opensslDiffieHellmanParameters" : "","oplogFetcherInitialSyncMaxFetcherRestarts" : 10,"oplogFetcherSteadyStateMaxFetcherRestarts" : 1,"oplogInitialFindMaxSeconds" : 60,"oplogRetriedFindMaxSeconds" : 2,"orphanCleanupDelaySecs" : 900,"periodicNoopIntervalSecs" : 10,"priorityTakeoverFreshnessWindowSeconds" : 2,"quiet" : false,"rangeDeleterBatchDelayMS" : 20,"rangeDeleterBatchSize" : 0,"recoverFromOplogAsStandalone" : false,"replBatchLimitOperations" : 5000,"replElectionTimeoutOffsetLimitFraction" : 0.15,"replIndexPrefetch" : "all","replWriterThreadCount" : 16,"reservedServiceExecutorRecursionLimit" : 8,"rollbackRemoteOplogQueryBatchSize" : 2000,"rollbackTimeLimitSecs" : 86400,"saslHostName" : "k8s-node2","saslServiceName" : "mongodb","saslauthdPath" : "","scramIterationCount" : 10000,"scramSHA256IterationCount" : 15000,"scriptingEngineInterruptIntervalMS" : 1000,"shardedConnPoolIdleTimeoutMinutes" : 2147483647,"skipCorruptDocumentsWhenCloning" : false,"skipShardingConfigurationChecks" : false,"sslMode" : "disabled","sslWithholdClientCertificate" : false,"startupAuthSchemaValidation" : true,"suppressNoTLSPeerCertificateWarning" : false,"syncdelay" : 60,"synchronousServiceExecutorRecursionLimit" : 8,"taskExecutorPoolSize" : 1,"tcmallocAggressiveMemoryDecommit" : 0,"tcmallocEnableMarkThreadTemporarilyIdle" : false,"tcmallocMaxTotalThreadCacheBytes" : 240123904,"testingSnapshotBehaviorInIsolation" : false,"traceExceptions" : false,"traceWriteConflictExceptions" : false,"transactionLifetimeLimitSeconds" : 60,"ttlMonitorEnabled" : true,"ttlMonitorSleepSecs" : 60,"waitForSecondaryBeforeNoopWriteMS" : 10,"wiredTigerConcurrentReadTransactions" : 128,"wiredTigerConcurrentWriteTransactions" : 128,"wiredTigerCursorCacheSize" : -100,"wiredTigerEngineRuntimeConfig" : "","writePeriodicNoops" : true,"ok" : 1,"operationTime" : Timestamp(1643251533, 1),"$clusterTime" : {"clusterTime" : Timestamp(1643251533, 1),"signature" : {"hash" : BinData(0,"dhTevtrY6MitlBcy4jDVWNXXusM="),"keyId" : NumberLong("7057052573554966530")}}
}

2.获取指定配置参数信息

// 获取指定配置参数信息
db.adminCommand({getParameter:1, replWriterThreadCount:true})
{"replWriterThreadCount" : 16,"ok" : 1,"operationTime" : Timestamp(1643251613, 1),"$clusterTime" : {"clusterTime" : Timestamp(1643251613, 1),"signature" : {"hash" : BinData(0,"doCUc6bMu/6J5m9e+xByEAYIuDo="),"keyId" : NumberLong("7057052573554966530")}}
}