Parameter | Force restart | Default value | Valid value | Minor engine version | Description | Documentation |
net.compression.compressors | Yes | snappy,zstd,zlib | [snappy|zlib|zstd|snappy,zstd,zlib|disabled] | Unlimited | The network compression algorithm used by mongod or mongos. If you specify multiple network compression algorithms, the priorities of the algorithms are in descending order. | net.compression.compressors |
operationProfiling.mode | Yes | off | [off|slowOp|all] | Unlimited | The level of operations that the database profiler profiles. Note If this parameter is enabled, instance performance is degraded. Proceed with caution when you want to enable this parameter in the production environment. | operationProfiling.mode |
operationProfiling.slowOpThresholdMs | No | 100 | [0-65536] | Unlimited | The slow operation time threshold. Slow operations refer to operations that run for a longer period of time than this threshold. Unit: milliseconds. | operationProfiling.slowOpThresholdMs |
replication.oplogGlobalIdEnabled | Yes | false | [true|false] | Unlimited | Specifies whether to enable the global identifier (GID) to accelerate two-way synchronization performed by Data Transmission Service (DTS) or mongoShake. | Self-developed parameter |
replication.oplogSizeMB | No | 10% | [1024-1073741824] | Unlimited | The maximum size of the oplog collection. Unit: MB. The default value is capped at 10% of the disk size. | replication.oplogSizeMB |
rsconf.writeConcernMajorityJournalDefault | No | true | [true|false] | Unlimited | Specifies whether to persist the journal when the write concern is set to majority. | replSetGetConfig |
setParameter.cursorTimeoutMillis | No | 600000 | [1-2147483647] | Unlimited | The expiration threshold of the idle cursor. Unit: milliseconds. If the idle time of a cursor exceeds this threshold, ApsaraDB for MongoDB deletes the cursor. In this case, if you attempt to access the cursor again, the system returns the "cursor not found" error message. | cursorTimeoutMillis |
setParameter.flowControlTargetLagSeconds | No | 10 | [1-600] | Unlimited | The threshold for triggering the flowControl mechanism. Unit: seconds. The flowControl mechanism ensures that a majority of data is committed within the specified threshold. | flowControlTargetLagSeconds |
setParameter.internalQueryMaxBlockingSortMemoryUsageBytes | No | 33554432 | [33554432-268435456] | Unlimited | The maximum available memory during the sorting phase. Unit: bytes. The default value is equivalent to 32 MB. | To be released |
setParameter.maxTransactionLockRequestTimeoutMillis | No | 5 | [0-60] | Unlimited | The timeout period for the transaction to wait to acquire locks required by the operations in the transaction. Unit: milliseconds. | maxTransactionLockRequestTimeoutMillis |
setParameter.migrateCloneInsertionBatchSize | No | 0 | [0-1000] | Unlimited | The maximum number of documents to insert in a single batch during the cloning stage of the chunk migration process. The default value 0 indicates that batches can contain up to 16 MB of documents. | migrateCloneInsertionBatchSize |
setParameter.oplogFetcherUsesExhaust | Yes | true | [true|false] | Unlimited | Specifies whether to enable streaming replication. The default value true indicates that streaming replication is enabled. | oplogFetcherUsesExhaust |
setParameter.rangeDeleterBatchDelayMS | No | 20 | [0-600000] | Unlimited | The interval to wait before the next batch of deletion during the cleanup stage of the chunk migration process. Unit: milliseconds. This parameter affects the cleanupOrphaned command that is used to clean up orphaned documents. | rangeDeleterBatchDelayMS |
setParameter.rangeDeleterBatchSize | No | 0 | [0-1000] | Unlimited | The maximum number of documents in a single batch of asynchronous deletion during the cleanup stage of the chunk migration process. The default value 0 indicates that the system uses an appropriate value. In most cases, the value is 128. | rangeDeleterBatchSize |
setParameter.replWriterThreadCount | Yes | 16 | [1-256] | Unlimited | The maximum number of threads used to apply replicated operations in parallel. The maximum number of used threads is capped at twice the number of CPU cores. | replWriterThreadCount |
setParameter.tcmallocAggressiveMemoryDecommit | No | 0 | [0|1] | Unlimited | Specifies whether to enable the aggressive memory strategy of TCMalloc. The default value 0 indicates that the strategy is disabled. | tcmallocAggressiveMemoryDecommit |
setParameter.tcmallocReleaseRate | No | 1 | [1-10] | Unlimited | The rate at which TCMalloc releases memory to the operating system. A larger value indicates a faster memory release. | tcmallocReleaseRate |
setParameter.transactionLifetimeLimitSeconds | No | 60 | [1-300] | Unlimited | The total timeout of the transaction, which indicates the lifecycle of the transaction. Unit: seconds. A transaction whose execution time exceeds this threshold is aborted to relieve the pressure on the WiredTiger cache. | transactionLifetimeLimitSeconds |
storage.oplogMinRetentionHours | No | 0 | [0.00-720.00] | Unlimited | The retention period of oplog entries. The parameter value can be a floating-point number. Unit: hours. | storage.oplogMinRetentionHours |
storage.wiredTiger.collectionConfig.blockCompressor | Yes | snappy | [snappy|zlib|zstd|none] | Unlimited | The default storage compression algorithm of collection data. If you change the default algorithm, only all new collections use the specified new algorithm. To use another storage compression algorithm for another collection, run the createCollection command that contains options related to the algorithm. | storage.wiredTiger.collectionConfig.blockCompressor |
setParameter.chunkMigrationConcurrency | No | 1 | [1-64] | Unlimited | The number of concurrent threads used during chunk migration. | chunkMigrationConcurrency |
setParameter.receiveChunkWaitForRangeDeleterTimeoutMS | No | 10000 | [10000-3600000] | Unlimited | The timeout period for waiting for deleting orphaned documents before chunk migration. Unit: milliseconds. | To be released |
setParameter.minSnapshotHistoryWindowInSeconds | No | 300 | [0-600] | Unlimited | The window during which snapshot records in WiredTiger are retained. Unit: seconds. The value 0 indicates that the window is closed. | minSnapshotHistoryWindowInSeconds |
rsconf.chainingAllowed | No | true | [true|false] | Unlimited | Specifies whether to allow chained replication for a shard. For example, data is replicated from a primary node to a secondary node and then to a hidden node or from a primary node to a hidden node and then to a secondary node. | rsconf.chainingAllowed |
Elastic Compute Service (ECS)
Container Compute Service (ACS)
