[basex-talk] Too many open files? Ack!

Got this error: org.basex.core.BaseXException: /var/www/xxx/db/data/atv.basex (Too many open files) Oh, noes! What does this mean? I was just hitting the page quickly. I'm sunk if people can't hit the page repeatedly. Is there a setting to adjust this? Is it a heap space issue? How can I make sure this never happens? I have an embedded database. I load it through the application (no file). I don't know what you call that. It uses one big XQuery to generate the page. Any ideas? Thanks very much! Chas.