Monumentally slow directory performance.

Brian F. Feldman green at
Sat Apr 10 08:38:37 PDT 2004

Jaye Mathisen <mrcpu at> wrote:
> Running a 5.2 supped as of 4/9.
> I have the UFS_DIRHASH stuff compiled into my kernel.  Is there some other
> frob to actually "turn" it on?
> I run softupdates, and moving files from my local box over gig ethernet to a directory
> with 5000 files in it is moving about 1 file every 6-7 seconds.
> If I move the same files to an empty directory, they move so fast I can' even
> read the names, which is more "normal".
> Even directories with 2500 or so files seem really, really, really, really slow.
> at least for adding/removing.
> My FS is UFS2, on a 3ware RAID controller.  I would love any ideas.  smbd 
> is burning up 60-70% of the CPU, I've tried kernels with and without all
> the witness/diagnostic and all that stuff.

Burning up 60-70% of the CPU?  Just writing a file every 6-7 seconds to a 
pretty small directory?

{"/home/green"}$ ls Mail/current | wc -l
{"/home/green"}$ date; touch Mail/current/rand$RANDOM;\
> date; touch Mail/current/rand$RANDOM; date
Sat Apr 10 11:37:55 EDT 2004
Sat Apr 10 11:37:55 EDT 2004
Sat Apr 10 11:37:55 EDT 2004

You should be getting "many" a second.  Samba must be doing something wrong/
stuck on something.

Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green at                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\

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