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What is the maximum length of a mongodb query?


Asked by Kenzie Randolph on Dec 08, 2021 MongoDB



Maximum MongoDB query memory size (This limitation is only for 3.2 server version) 40 MB: Maximum execution time for MongoDB operations: 30s: Idle connection timeout for server side connection closure* 30 minutes
Moreover,
In MongoDB, you can use the limit() method to specify a maximum number of documents for a cursor to return. When you query a collection using the db.collection.find() method, you can append limit() to specify the limit. Example. First let's do a query without a limit (so we can see how many documents are returned): Without a Limit
And, BSON Document Size¶. The maximum BSON document size is 16 megabytes. The maximum document size helps ensure that a single document cannot use excessive amount of RAM or, during transmission, excessive amount of bandwidth. To store documents larger than the maximum size, MongoDB provides the GridFS API.
Just so,
MongoDB evaluates non-$wherequery operations before $whereexpressions and non-$wherequery statements may use an index. A much better performance is to store the length of the string as another field and then you can index or search on it; applying $wherewill be much slower compared to that.
Thereof,
There can be no more than 32 fields in a compound index. You cannot combine the $text query, which requires a special text index, with a query operator that requires a different type of special index. For example you cannot combine $text query with the $near operator.