[MUMmer-help] delta-filter memory usage

[G. M. <gre...@gm...>]

Hi,
I have a ~9 GB .delta file that I'm trying to filter with delta-filter
(MUMmer 3.23) on a computer with 16 GB RAM (+ 4 GB swap space). Within a
minute or two of launching, the delta-filter process takes up essentially
the entire system memory and is eventually killed by the system, apparently
without having produced any output. I'm new to MUMmer, but my naive
expectation was that it would only need enough memory to store the full
delta file (at most).

Is this high memory usage expected? If so, is there a way to estimate the
memory that would be required for the delta-filter process to complete
successfully?

Thanks very much in advance,
Greg