CODEWITHSUNDEEP
mongodb
Hari
Hari

Reputation: 1623

How Cursor Batches Works in MongoDb?

I'm new to mongodb,when i was going through cursor batches it tells the amount of data in the batch will not exceed the maximum BSON document size,but when i go through Bson Document Size it tells The maximum BSON document size is 16 megabytes,i can't get whether the batch will be of size 16 megabytes or each document in batch will 16 megabytes, how does cursor batch works if my query returns 20 documents whose minimum size 1mb

Upvotes: 2

Views: 2515

Answers (1)

Android
Android

Reputation: 542

When you run a query looking for documents what mongodb does is it just return the cursor of selected documents,but returning cursor alone is not efficient so we can fetch first batch of results which also add overhead if result set is too large. So, as a compromise and to improve performance what mongodb does is return the first 101 documents in the initial batch wait for next cursor call after subsequent requests cursors dont have the default size so that it limits to 16mb message size!!!

Upvotes: 1

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