Realistic settings for [myisamchk] in my.cnf

I'm looking to optimize the myisamchk settings for some table rebuilds
I need to do.

I'm running CentOS 5 and MySQL 5.1 in a VMWare VM with 4 vCPUs and 4GB
of memory.

All the examples I can find online look like they are several years
old, and just copied from someone else's config. I think with 4GB of
memory, the settings can be better than this example:

[myisamchk]
key_buffer = 256M
sort_buffer_size = 256M
read_buffer = 2M
write_buffer = 2M

Any suggestions? Thanks,

-Hank

query, mysql

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