File size limit for the validator?

Hello,

When I attempt to validate a large page (342k) [1], the 
validator works for awhile and then does nothing.  That is, 
no results page loads, it just stays at the home page [2].  
I believe the problem is the file size, but cannot find
any information on what the max size for the service
is.  Any ideas?

Thanks,
liz

[1] http://cxc.harvard.edu/sherpa/documents/manuals/html/slang_commands.html
[2] http://validator.w3.org/