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Xanda - /dev/project - Double your disk read performance in a single command

Here's the magic I used to double sequential read performance:


[root@cyberman mydb]# blockdev --getra /dev/sdb
256
[root@cyberman mydb]# blockdev --setra 262144 /dev/sdb

In retrospect, 262144 (about 128 MB!) was a TAD overkill. More realistic values are 1024, 2048, 4096, 8192, and maybe 16384...it really depends on the number of hard disks, their speed, your RAID controller, etc. With the 3Ware 9500S, I experienced significantly diminishing returns after 4096; your mileage may vary.

[The content of this page is taken from Cyberciti. Feel free to visit the original site because who knows the original author might update the content from time to time]