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List:       james-user
Subject:    Re: James performance with mail attachment
From:       Stefano Bagnara <apache () bago ! org>
Date:       2011-05-25 14:07:47
Message-ID: BANLkTimUdx_Px3+Toc_2igfbARrmK3r8ow () mail ! gmail ! com
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2011/5/25 kushal soy <kushal.soy@gmail.com>:
> Stefano,
>
>  I didn't get solution suggested for disk access bottleneck , can you
> please explain me again.

If you use many processors in your spoolmanager configuration you can
try reducing them so that the big emails needs few/no processor
changes. If you already use few processors then try to use faster
disks.

Stefano

> Thanks
>
> On Wed, May 25, 2011 at 12:44 PM, Stefano Bagnara <apache@bago.org> wrote:
>
>> 2011/5/25 kushal soy <kushal.soy@gmail.com>:
>> > Hi,
>> >
>> >  my mail client is sending java mail with attachment(size:250 KB).
>> > but even with increasing session(independent thread), the client deposit
>> > speed is slow( ~5msg/second). with lower size, client deposit become much
>> > faster though.
>> > also tried with smtp-source for large body size.
>> >  [time ./smtp-source -s 50 -l 256000 -m 5000 -d -c -f red@domain.com -t
>> > blue@domain.com localhost:25]
>> >
>> >
>> > currently, performance data in James page is of 100 bytes of body
>> data.[*time
>> > smtp-source -A -C1500 -l 100 ..*.], which doesn't hold for large size.
>> >
>> >
>> > what is the expected performance of James with mail attachment?
>>
>> The problem is probably disk access. James writes and reads the full
>> message to file/db many times and this is a bottleneck.
>> You can reduce your processors making sure the most used "way" is
>> defined in the root processor. Whenever a message is moved from one
>> processor to another it gets written again on disk.
>>
>> Stefano
>>
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>

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