Effects of Changing vfs.ufs.dirhash_maxmem in FreeBSD

I have a busy web frontend server many files in a single directory. The server is running FreeBSD 8 amd64. Here is the result of changing the sysctl vfs.ufs.dirhash_maxmem to 67108864. Note the change in system (red) area. The vertical arrow shows when the change was made:

Recovering from a terminal full of gibberish

Have you ever accidentally tried to view a binary file and your terminal started spewing all sorts of weird characters?


Performance presentation, Des Moines Web Geeks

Matt Nuzum, the webmaster of, invited me to speak at the Des Moines Web Geeks meeting last night. The venue, Impromptu Studios, was a bit hard to find.

Watching traffic on FreeBSD

Ben Wong at MostlyGeek pointed out that a great way to watch traffic on FreeBSD is the command systat -ifstat 1 which shows:



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