Hi, this line in fstab $ grep tmp /etc/fstab tmpfs /tmp tmpfs nodev,nosuid,size=3G 0 0 usually is commented out. One time it was needed, when building a kernel failed. Today building Firefox failed. I'll try with 3G again, instead of half of the memory (1.9G), after a restart, to safely clean tmp first. I suspect that if the RAM size doesn't fit, swap isn't used?! I also wonder why just one swap partition is recognized?! $ df -h | grep /tmp tmpfs 1.9G 1.9G 464K 100% /tmp $ grep SwapTotal /proc/meminfo SwapTotal: 2546264 kB $ grep swap /etc/fstab /dev/sdb7 none swap defaults 0 0 /dev/sda10 none swap defaults,pri=-2 0 0 [rocketmouse@archlinux ~]$ lsblk | grep sdb7 ├─sdb7 8:23 0 2.4G 0 part [SWAP] [rocketmouse@archlinux ~]$ lsblk | grep sda10 ├─sda10 8:10 0 2.2G 0 part $ sudo nano /etc/fstab $ sudo mount -a $ lsblk | grep SW ├─sdb7 8:23 0 2.4G 0 part [SWAP] $ grep SwapTotal /proc/meminfo SwapTotal: 2546264 kB $ grep swap /etc/fstab | grep -v "#" /dev/sdb7 none swap defaults 0 0 /dev/sda10 none swap defaults 0 0 Regards, Ralf