Increasing per process memory limit?

[Ragnar Beer <rbeer@uni-goettingen.de>]

Howdy!

I'm using rsync to keep my Mail folders synced but now that the folder
contains almost 240000 files rsync dies and says:

ERROR: out of memory in make_file
rsync error: error allocating core memory buffers (code 22) at
/usr/ports/net/rsync/w-rsync-2.5.2/rsync-2.5.2/util.c(232)

Is there a per process limit of memory that each process can use? I
observed memory usage with top and saw that rsync used up to 32MB and than
died. I looked at sysctl and ulimit (-d and -s) but couldn't find the
solution. What can I do?

Ragnar