[ubuntu]HDDのチューニング
HDDがやたら遅い気がするのでチューニングしてみる
$ sudo su - # sudo hdparm /dev/sda /dev/sda: IO_support = 0 (default 16-bit) readonly = 0 (off) readahead = 256 (on) geometry = 7296/255/63, sectors = 117210240, start = 0 # hdparm -t /dev/sda [~/project/dshop] /dev/sda: Timing buffered disk reads: 44 MB in 3.06 seconds = 14.39 MB/sec
とりあえずreadheadだけ変えてみる
# hdparm -a1024 /dev/sda /dev/sda: setting fs readahead to 1024 readahead = 1024 (on) ~# hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 44 MB in 3.12 seconds = 14.08 MB/sec
ちょっと早くなった
~# hdparm -a2048 /dev/sda /dev/sda: setting fs readahead to 2048 readahead = 2048 (on) # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 42 MB in 4.05 seconds = 10.37 MB/sec
ちょっと遅くなったってことで多分1024が最適ではないかと思う