What does the buffered parameter do in Dapper dot net?

Question

Dapper dot net has a buffer parameter (a bool), but as far as I can tell the only thing it does is cast the result to a list before returning it.

A

Answer 1

I have to disagree with @chris-marisic on this... I ran into multiple "Out Of Memory" exceptions at that exact line (data.ToList()) when using buffered:true. It was not a "zillion rows X bazillion columns" query, just a regular 5-6k rows SQL-result with about 30 columns.

It really depends on your configuration. E.g. whether your SQL and IIS run on same physical machine or not. And how much memory is installed on the IIS machine, and what is the page file setting etc. If the web-server has 2 GB or less - consider setting "buffered:false" for super-heavy reports.