"timfox" wrote : The idea with freeFiles being pre-opened is to prevent a pause when the journal moves to the next file as it opens the file. We could have only the first freeFile opened. A checkout from freeFile would aways return instantly while another thread would open the next first file. Same way as we would have another thread closing the file. (since that represents a big pause on AIO). And I would make the files bigger by default also.. as I said before... to avoid opening and closing them so often under high load. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4150533#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...