Hi, MonetDB is crashing because of OOM. I have tried following config update but in vain. sysctl -w vm.overcommit_memory=2 sysctl -w vm.overcommit_ratio=75 Is there any configuration to limit mserver memory usage? Database contains 300 million records and the select query expects 120,620 records as result. This is the log message: Out of memory: Kill process 30650 (mserver5) score 981 or sacrifice child Killed process 30650, UID 222, (mserver5) total-vm:35263192kB, anon-rss:14911384kB, file-rss:208kB *mserver5 version*: MonetDB 5 server v11.15.11 "Feb2013-SP3" (64-bit, 64-bit oids) Copyright (c) 1993-July 2008 CWI Copyright (c) August 2008-2013 MonetDB B.V., all rights reserved Visit http://www.monetdb.org/ for further information Found 14.5GiB available memory, 4 available cpu cores Libraries: libpcre: 7.8 2008-09-05 (compiled with 7.8) openssl: OpenSSL 1.0.0 29 Mar 2010 (compiled with OpenSSL 1.0.0-fips 29 Mar 2010) libxml2: 2.7.6 (compiled with 2.7.6) Compiled by: ec2-user@ip-10-252-152-159 (x86_64-unknown-linux-gnu) Compilation: gcc -g -O2 Linking : /usr/bin/ld -m elf_x86_64 *Filesystem Size Used Avail Use% Mounted on* /dev/xvde1 5.0G 2.4G 2.4G 50% / tmpfs 7.3G 0 7.3G 0% /dev/shm /dev/xvdf 414G 209G 184G 54% /media/ephemeral0 (dbfarm) Regards, Ravi