[Dovecot] Slow header fetching rate over nfs mailspool.

[Timo Sirainen]

On Thu, 2008-01-24 at 00:18 +0800, Dino Ming wrote:
> open("/dap/mstorage/example.com/dino/Maildir/cur", O_RDONLY|
> O_NONBLOCK|O_DIRECTORY) = 8 <0.000098>
..
> getdents64(8, /* 114 entries */, 8192)  = 8128 <0.347680>
> getdents64(8, /* 113 entries */, 8192)  = 8136 <1.385329>
> getdents64(8, /* 113 entries */, 8192)  = 8144 <1.668419>
> getdents64(8, /* 113 entries */, 8192)  = 8136 <2.942874>
> getdents64(8, /* 107 entries */, 8192)  = 7712 <5.346971>
> getdents64(8, /* 0 entries */, 8192)    = 0 <0.000046>

This means that a simple "ls" call on that cur directory would take
about 11 seconds (when the directory entries aren't already cached). You
could verify that this happens.

So I can't really say anything else than that the problem is somewhere
outside Dovecot..

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