[Dovecot] performance problems with IMAPS

[Matt Brookings]

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On 05/10/2011 04:58 PM, Linda Walsh wrote:
>>> Looking at a few, I see:
>>> 4148 bytes
>>> 2116 bytes
>>> 1604 bytes
>>> 692 bytes
>>
>> Isn't that the client that is sending it in small pieces then? How did
>> you measure those bytes?
> Using wireshark.   It **could** be the client, but it's hard to see the

Linda, packets are limited to the MTU of the underlying physical
connection.  Packet sniffing will not give you a glimpse into how files
are being written.  Many packets may be sent and received before any
data is passed on to the application to be read by a system call.

You state above that you saw a packet on the wire that was 4148 bytes,
one that was 2116, and one that was 1604.  These packets are too large
to be transmitted over Ethernet.  What type of physical connection were
you sniffing these packets on?
- -- 
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    Matt Brookings <matt at inter7.com>       GnuPG Key FAE0672C
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