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optimize ubuntu on ssd
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| sudo fstrim / -v | |
| gksudo gedit /etc/fstab | |
| # demo : | |
| # UUID=aeade6fd-2b24-4e59-bc8c-6f1791338b0c / ext4 noatime,nodiratime,discard,errors=remount-ro,commit=60 0 1 | |
| # add this | |
| # add this | |
| tmpfs /tmp tmpfs defaults 0 0 | |
| tmpfs /var/tmp tmpfs defaults 0 0 | |
| tmpfs /var/log tmpfs defaults 0 0 | |
| # После этого стоит настроить отложенную запись — ядро будет копить данные, | |
| # ожидающие записи на диск, и записывать их либо при | |
| # острой необходимости, либо по истечении таймаута. Я ставлю таймаут на 200 секунд, кто-то — на 150. | |
| # Для этого открываем /etc/sysctl.conf и добавляем параметры | |
| gedit /etc/sysctl.conf | |
| vm.laptop_mode = 5 // Включение режима | |
| vm.dirty_writeback_centisecs = 20000 // время в сСк. Т.е. 100ед = 1секунда | |
| # Disk head scheduler for SSDs | |
| # A disk scheduler optimizes the order of disk requests by considering the position | |
| # of the hard drive’s read/write head. | |
| # An SSD needs no such optimization, so it’s best to use the noop (no-operation) scheduler. | |
| # | |
| # I switched to the noop scheduler for my SSD by adding the to following line to /etc/rc.local | |
| # (replace sdb with your own SSD’s device node name): | |
| echo noop > /sys/block/sda/queue/scheduler |
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