[Dovecot] severe performance problem (mail cache related?)

[Timo Sirainen]

On Fri, 2007-02-16 at 07:40 -0500, Bill Boebel wrote:
>  7832 virtual   25   0   580  496   376 R    71.5  0.0  70:59   0 imap [user at example.com 192.168.1.14]
..
> read(0, 0x96ca1f0, 3992)                = -1 EAGAIN (Resource temporarily unavailable)
> read(0, 0x96ca1f0, 3992)                = -1 EAGAIN (Resource temporarily unavailable)

Looks like my rc22 fix broke that then. It didn't loop forever, only
until client sent the whole message or until it disconnected, but it did
eat all the CPU while waiting.

Fix here:

http://dovecot.org/list/dovecot-cvs/2007-February/007721.html

I guess this is good enough reason for rc23.

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