How to check the current configuration of MongoDB?

In order to check the current configuration of MongoDB, you can use getCmdLineOpts. The query is as follows −
> db._adminCommand( {getCmdLineOpts: 1});
The following is the output −
{ "argv" : [ "mongod" ], "parsed" : { }, "ok" : 1 }
In order to check live settings, you can use the below query −
> db._adminCommand({getParameter:"*"});
The following is the output &minus
{
   "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" : "undefined",
   "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,
   "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" : "uninitialized",
   "replWriterThreadCount" : 16,
   "reservedServiceExecutorRecursionLimit" : 8,
   "rollbackRemoteOplogQueryBatchSize" : 2000,
   "rollbackTimeLimitSecs" : 86400,
   "saslHostName" : "DESKTOP-QN2RB3H",
   "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" : NumberLong(1073741824),
   "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
}