Minor Version and Storage Engine
Last updated: 2025-11-25 15:06:48
Storage Engine
Starting from version 3.2, TencentDB for MongoDB has upgraded its default storage engine to WiredTiger, fully replacing the earlier MMAPv1 engine. WiredTiger adopts a classic B-Tree architecture and introduces fine-grained concurrency control ranging from document-level to collection-level, significantly improving read-write performance. It also has multiple built-in compression algorithms such as Snappy and Zlib, significantly reducing disk usage and storage costs. Whether in read-intensive, write-intensive, or mixed workload scenarios, WiredTiger delivers better performance and higher storage efficiency to meet various application requirements.
Minor Version Release Notes
Minor Version Number | Addition, Optimization, or Fixing Description |
WT.70.12.2 | Supported enterprise-level features such as database audit, transparent data encryption (TDE), and SSL authentication. Resolved known issues in the Community Edition. |
WT.70.12.1 | Optimized the performance. |
WT.70.12.0 | Supported the 7.0 version. |
Minor Version Number | Addition, Optimization, or Fixing Description |
WT.60.5.3 | Fixed the issue of errors in the audit configuration information. Fixed the issue of errors that occurred during backup and database and table rollback. |
WT.60.5.2 | Supported specifying the flashback log storage path through the flashbacklog.path parameter, which was supported by the Cloud Disk Edition only. |
WT.60.5.1 | Fixed issues related to the Community Edition. Fixed the issue of inaccurate monitoring data. |
WT.60.5.0 | Supported the 6.0 version. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.50.12.7 | Fixed the issue where the listCollections command failed due to excessively large BSON objects. Optimized the physical backup and rollback process. |
WT.50.12.6 | Fixed the issue of a parsing failure of the getRestoreInfo command caused by the use-after-free bug. Fixed the issue of time-series table statistics to ensure all insert operations are accurately recorded and counted. |
WT.50.12.1 | Supported public network access. |
WT.50.12.0 | Supported MongoDB 5.0 version. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.44.13.9 | Optimized the physical backup and rollback process. |
WT.44.13.8 | Supported static encryption. |
WT.44.13.4 | Supported public network access. |
WT.44.13.2 | Optimized the isMaster command. |
WT.44.13.1 | Supported audit and password-free access. |
WT.44.13.0 | Supported the MongoDB 4.4 version. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.42.11.19 | Optimized the physical backup and rollback process. |
WT.42.11.18 | Fixed the issue of errors in the audit configuration information. |
WT.42.11.16 | Supported public network access. |
WT.42.11.15 | Supported custom rule audit for database activities. Supported database access through SSL authentication. |
WT.42.11.14 | Improved the stability of the moveChunk kernel. |
WT.42.11.13 | Supported users to enable the enhanced changeStream mode through commands. |
WT.42.11.12 | Fixed the issue of errors that occurred when the databases with the same names were created and deleted repeatedly. Fixed the issue related to changeStream. |
WT.42.11.11 | Resolved the issue of kernel exceptions that occurred during the applyOps process. |
WT.42.11.10 | Optimized database audit performance. |
WT.42.11.9 | Supported database and table rollback through the physical backup method to improve the backup speed. |
WT.42.11.8 | Optimized the routing information refresh policy. |
WT.42.11.7 | Optimized the control logic for shard addition. |
WT.42.11.6 | DDL operations were supported by changeStream. |
WT.42.11.5 | Optimized kernel parameters to improve performance. |
WT.42.11.4 | Blocked the high-risk operations of the system. |
WT.42.11.3 | Fixed the issue of a getMore operation exception. |
WT.42.11.2 | Supported the maxTimeMS parameter. |
WT.42.11.1 | Supported the online compact feature. |
WT.42.11.0 | Supported the MongoDB 4.2 version. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.40.3.38 | Optimized the physical backup and rollback process. |
WT.40.3.37 | Fixed the issue of BatchWriteOp invariance that occurred during MongoDB instance shutdown. Fixed the issue of node crashes caused by using Flow Control to add nodes. |
WT.40.3.35 | Supported public network access. |
WT.40.3.34 | Supported custom rule audit for database activities. Supported database access through SSL authentication. |
WT.40.3.33 | Speed limit control was supported by the TTL index. Supported settings of the expired TTL data cleanup window. |
WT.40.3.32 | Resolved the issue of stability after physical database and table rollback. Resolved the issue of memory leakage after connection failures. |
WT.40.3.31 | Supported SQL traffic throttling. |
WT.40.3.30 | Supported users to customize the slow query threshold. |
WT.40.3.29 | Optimized database audit performance. |
WT.40.3.28 | Optimized the routing refresh policy for sharded clusters. |
WT.40.3.27 | Supported database and table rollback through the physical backup method. |
WT.40.3.26 | Optimized the locking logic for write conflict retries to improve performance. |
WT.40.3.25 | Optimized user permissions to avoid unauthorized operations. |
WT.40.3.24 | Creation of LSM engine tables and indexes was prohibited. |
WT.40.3.23 | Optimized the logic of adding shards. |
WT.40.3.22 | Optimized the lock mechanism. |
WT.40.3.21 | Optimized the changeStream logic. |
WT.40.3.20 | Optimized performance. |
WT.40.3.19 | Optimized the session-related logic. |
WT.40.3.18 | Optimized the read performance of the secondary database. |
WT.40.3.17 | Optimized the password-free access logic. |
WT.40.3.16 | Optimized the logic of collecting monitoring data. |
WT.40.3.15 | Supported the efficient management of millions of collections. |
WT.40.3.14 | Optimized the performance of physical backup in scenarios with a large number of files. |
WT.40.3.13 | Optimized the mongos connection mechanism. |
WT.40.3.12 | Optimized the routing refresh logic and audit performance. |
WT.40.3.11 | Enhanced the changeStream capability. |
WT.40.3.10 | Supported the maxTimeMS parameter. |
WT.40.3.9 | Supported mongos overload protection. |
WT.40.3.8 | Supported database audit. |
WT.40.3.7 | Optimized the session-related logic. |
WT.40.3.6 | Improved the database connection performance and the database startup performance in scenarios with a large number of files. |
WT.40.3.5 | Supported password-free access. |
WT.40.3.4 | Resolved the issue of bloat exceptions in the database disk file. |
WT.40.3.3 | Supported IPv6. |
WT.40.3.2 | Supported blocking after the disk is full. Supported the display of client connection information. |
WT.40.3.1 | Supported the superGeo command. Supported the physical backup. Enriched the monitoring metrics. |
WT.40.3.0 | Released the MongoDB 4.0 version based on the WiredTiger engine. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.36.8.13 | Resolved the issue of node exceptions caused by excessive memory pressure. |
WT.36.8.12 | Optimized the password-free access logic. Optimized the display of the client list. |
WT.36.8.11 | Optimized the connection performance. |
WT.36.8.10 | Optimized the session-related logic and the data synchronization logic between nodes. |
WT.36.8.9 | Supported the physical backup. |
WT.36.8.8 | Supported the password-free access. |
WT.36.8.7 | Optimized the Mongos connection pool mechanism. |
WT.36.8.6 | Optimized the connection logic. |
WT.36.8.5 | Supported IPv6. |
WT.36.8.4 | Optimized the logic of monitoring statistics. |
WT.36.8.3 | Optimized the logic of blocking a disk. |
WT.36.8.2 | Optimized the connection model. |
WT.36.8.1 | Optimized the security-related mechanism. |
WT.36.8.0 | Supported the 3.6 version. |
Minor Version | Addition, Optimization, or Fixing Description |
WT.32.12.9 | Supported setting the maximum timeout duration for requests and creating indexes using the background method by default for instances. |
WT.32.12.8 | Optimized the Mongos connection pool mechanism of MongoDB. |
WT.32.12.7 | Supported IPv6 and parameter configurations. |
WT.32.12.6 | Optimized the kernel connection parameters to improve the performance. |
WT.32.12.5 | Resolved the issue of kernel probability exceptions. |
WT.32.12.4 | Supported the superGeoNear command. |
WT.32.12.3 | Optimized kernel parameters to improve performance. |
WT.32.12.2 | Supported adjustments of the oplog capacity. |
WT.32.12.1 | Supported dynamic adjustments of the number of connections. |
WT.32.12.0 | Supported the MongoDB 3.2 version with the WiredTiger engine. |
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