Directory with large number of files

[Janos Dohanics]

I have a directory with over 180,000 files in 4 subdirectories. Over 170,000 
of the files are in one of the subdirectories. The files are image files, 
mostly <50K. The machine has 2 GB RAM.

What would be a reasonable setting for vfs.ufs.dirhash_maxmem? Is there a 
disadvantage to setting vfs.ufs.dirhash_maxmem too high?

Is there any other setting to change to find files faster in a directory with 
such large number of files?

Thank you for your advice.

-- 
Janos Dohanics