Increase Hash Checking Speed In Rtorrent

Hi i found this on a site,

It has been known increased my performance with rtorrent ten fold with hash checking but please if you do not know what your doing dont try this.

The setting hash_read_ahead controls how many MB to ask the kernel to read ahead when doing hash checking. If this value is too low it might not fully utilize the possible IO, while too high it might make the kernel give up. This should depend on how much free memory is available and the kernel implementation. Usefull values would probably range from 1 to 10.
*BSD Notes

I have tweaked the settings i've used in my .rtorrent.rc, and this enables me to hash at about 10Mb/sec. Listed below are the settings I use.

* hash_read_ahead = 8
* hash_max_tries = 5
* hash_interval = 10

The real perfomance boost was the hash_interval change. This was what yielded the almost 10 fold increase in speed over the default settings.
Notes
Disk allocation