Changing swappiness on Linux and SDD

Tue, 19 Feb 2019 00:00:00 +0000

The swappiness parameter is available from/proc/sys/vm/swappiness

“0” means “swap only to disk when you absolutely have to”
“100” means “swap immediately to disk”

If you are running you OS from an SDD, you might not want the default of 60, especially not if you have decent amounts of RAM (16 or 32 GB). In order to preserve the lifetime of your SDD drive, executesudo sysctl vm.swappiness=10.However, the setting disappears after a reboot and in order to make it permanant, you need to add the following line to /etc/sysctl.conf:vm.swappiness=10

Asustor AS7004T RAM upgrade

Sun, 31 Jul 2016 00:00:00 +0000

Are you about to buy the new Asustor AS7004T ? It is certainly an impressive small NAS server, but it comes only with 2GB RAM and if you want to utilize some of its cooler capabilities (like running virtual machines ) you need to add RAM. Its specs are uninformative (“2GB SO-DIMM DDR3 (Expandable. Max 16GB)”) and the memory installation guide misleading. However, it really does have two RAM slots for DDR3 SO-DIMM. The device that I bought had 2GB RAM glued into the user-serviceable RAM slot, while the virtually inaccessible factory RAM slot was empty. If you want to add RAM, it requires you to void the factory warranty as the empty RAM slot is not accessible without removing the screw that is covered by the “Void if removed” sticker. Anyway, almost complete disassembly is required for you to access the free RAM slot, which is not for the faint of heart. Especially since Asustor’s own YouTube video shows the disassembly only for the 10-bay AS7010T model, which is significantly different from the AS7004T. The biggest difference between the 7004T and the 7010T is that the 7004T has an additional cooling element screwed to the PCI back plane. This cooling element takes the heat from the mother board, but also makes removing the back plane and the mother board more tricky. You also need to remove the power supply and disconnect the power cables from the motherboard before you can take the motherboard out.

RAM on Michael’s Domain

Changing swappiness on Linux and SDD

Asustor AS7004T RAM upgrade