Hello, i would like to limit the memory usage of MonetDB to half of the physical available memory. This is on Debian 6.0 64-bit with 48GB memory. I added to /etc/default/monetdb: ulimit -v 25165824 On startup MonetDB still reports: 2012-08-08 13:21:30 MSG db[15678]: # Found 47.262 GiB available main-memory. cat /proc/15687/limits shows the limit: Limit Soft Limit Hard Limit Units Max address space 25769803776 25769803776 bytes Unfortunately on the first query i run the database gets killed: 2012-08-08 13:21:54 MSG merovingian[15663]: database 'db' (15678) was killed by signal SIGSEGV Is there a way to limit the memory usage of MonetDB on Linux? Package: monetdb5-server Version: 11.11.5-20120710 Regards and thanks, Christian.