I’m trying to load a 24MB CSV from a URL (it’s hosted on amazon S3), but I get the following error :

Is there something I can do ?

The size of your CSV file is most likely the issue. When you run queries, Redash loads all of the results into memory in your browser. In my experience, the interface begins to feel sluggish if you load in more than 300,000 fields of data simultaneously. I would suggest dumping your CSV into a server-style database and querying it that way.