Косяки MongoDB

Перечислю косяки MongoDB, которые попадаются при работе с ней. Список пополняется.

• При локе базы, любая работа с монго подвешивает mongo shell (Bug: SERVER-4243)
• Index entries have a limitation on their maximum size (the sum of the values), currently approximately 800 bytes. (Bug: SERVER-3372)
• The maximum size of a collection name is 128 characters (including the name of the db and indexes). It is probably best to keep it under 80/90 chars.[link]
• MongoDB limits the data size of individual BSON objects/documents. At the time of this writing the limit is 16MB.[link]
• A Year with MongoDB :

• Non-counting B-Trees 

• Poor Memory Management 

• Uncompressed field names 

• Global write lock 

• Safe off by default 

• Offline table compaction 

• Secondaries do not keep hot data in RAM