Zahir> Hit a bit of a wall Zahir> We are using a standard jquery uploader connected to Dancer2 and that in Zahir> general works great Can you give us an example of your code so we can help debug this? But from my googling around, it's almost certainly a problem with how the file is written from the client, through starman, to dancer and then to disk. Are you trying to parse forms or parts in the upload by any chance? Zahir> We are testing uploading large files (600M) and having a lot of issues: Zahir> We see the file uploading to /tmp as expected. At the end of Zahir> the upload, Starman has a lot of CPU and Mem usage and the Zahir> defined upload route (our code) does not get hit for several Zahir> minutes. It looks like Starman is loading this into memory and Zahir> hitting swap issues So you need to show us how you're using starman and what it's config is before we can help here. Just increasing memory won't solve the problem. You need to figure out why starman is buffering the upload and how to get it out of the middle. John