I have the same problem.
What is the max_execution_time on Dreamhost dedicated ?
Can I use
max_execution_time = -1
But then my import will still be automatically stop after 5mns ?
"FastCGI processes will time out after 5 minutes. You might try setting the domain to use regular CGI to see if your webserver allows an extension on processing time. Note that PHP will try to store uploaded data in memory before writing the complete file to disk, so there is an insurmountable limit there, too."