Hi, I have a really large amount of data here and a Ruby program dealing with it. I noticed how this program started to use swap space and then, hours later, terminated. Then I watched (Linux here) "/proc/$$/statm". Yes, the whole memory was eaten up. I know that my program does not have a bug because it is running for a year now without complaint. So I downgraded my Ruby from 1.8.6_p230 to 1.8.6_p111 and--voila--the statm output yields constant values and the program finishes successfully. Sorry, I cannot provide any data because it is from a lawyers office and underlies duty of confidentially. I would search on my own for the bug if someone could give me a hint where to start doing this. Thanks in advance. Bertram -- Bertram Scharpf Stuttgart, Deutschland/Germany http://www.bertram-scharpf.de