[RCD] another performance fix

Ziba Scott ziba at umich.edu
Fri Dec 5 20:19:43 CET 2008


Ziba Scott wrote:
> Dennis P. Nikolaenko wrote:
>   
>> Ziba Scott wrote:
>>     
>>> till wrote:
>>>  
>>>       
>>>> On Sat, Nov 29, 2008 at 1:03 PM, Thomas Bruederli
>>>> <roundcube at gmail.com> wrote:
>>>>      
>>>>         
>>>>> till wrote:
>>>>>          
>>>>>           
>>>>>> I agree that we should keep this redirect.
>>>>>>
>>>>>> @alec If you want to avoid connections at all cost, did you try
>>>>>> running an IMAP proxy to see if you can gain some there?
>>>>>>               
>>>>>>             
>>>> Just found the link:
>>>> http://www.imapproxy.org/
>>>>
>>>>       
>>>>         
>>> We use imapproxy in production for both HORDE/IMP and RoundCube.  We
>>> have a proxy processes on each of our webmail servers which have
>>> permission to connect to IMAP as any user.  Once the webmail client
>>> connects to the proxy, the proxy will hold a connection open to the imap
>>> server.   
>>>       
>> Have you made any performance measurements? How many users do you
>> have? How many users are simultaneously online? How many connections
>> are between imapproxy and IMAP server at the same time on average and
>> at maximum?
>> -- 
>> Dennis
>>
>>     
> We haven't done any measurements on roundcube without imapproxy, and I
> don't have the numbers for concurrent proxy<->imap connections (I'm
> looking into that).

I don't have stats over time, but right now I'd roughly estimate 4,700
proxyd processes across 15 web servers.
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