[Users] Questions about openser

[Daniel-Constantin Mierla]

On 07/22/05 19:50, Michael Ulitskiy wrote:

>Daniel,
>Thanks for the reply. Please see inline.
>
>On Friday 22 July 2005 04:31 am, Daniel-Constantin Mierla wrote:
>  
>
>>Hello,
>>
>>On 07/21/05 23:20, Michael Ulitskiy wrote:
>>
>>    
>>
>>>Hello,
>>>
>>>I've asked this question in serusers and serdevel. Noone answered,
>>>so I thought I'd ask it here about openser.
>>>I haven't tried openser yet, it's on my todo list.
>>>I saw that openser implemented connection pool for mysql backend.
>>>What about postgres?
>>>
>>>      
>>>
>>The maintainer of this module has not implemented the connection pool 
>>yet. It was no activity for quite some time of postgres module,but now 
>>seems that many users started using it, so we have put it in the roadmap 
>>to review. Unfortunately I have no experience with postgres, so the 
>>priority is quite low in my list.
>>    
>>
>
>I see. That's a pity. BTW I can't find it in the roadmap available online.
>  
>
The review explicitly mentions the migration to the memory manager used 
by ser.

>  
>
>>>My guess is that every module using databse
>>>opens a separate connection and the number of concurrent connections
>>>will be the number of such modules multiplied by number of children?
>>>Is it true?
>>>
>>>      
>>>
>>yes.
>>
>>    
>>
>>>If so, are there any plans for connection pool for postgres?
>>> 
>>>
>>>      
>>>
>>see above.
>>
>>    
>>
>>>Also it's been noticed and confirmed by Andrei Pelinescu-Onciul that
>>>there are problems linking ser to multi-threaded libraries like libpq.
>>>Has it been addressed by openser?
>>> 
>>>
>>>      
>>>
>>is the same problem as in ser. It is the same module, we just fixed some 
>>warnings and a few bugs reported by users.
>>    
>>
>
>Then I just wanted to let you know that changes suggested by Dmitry Semyonov at
>http://mail.iptel.org/pipermail/serdev/2005-July/005148.html worked for me. At
>least it helped with "log_stderr=no" problem.
>  
>
ok, good to know. Maybe an entry in the FAQ will help the others in the 
future.

>  
>
>>>Also I'm curious whether number of children in openser is limited to a 
>>>given startup value or it is able to fork additional children as needed?
>>> 
>>>
>>>      
>>>
>>It is limited to startup value, it does not fork additional children if 
>>needed. The maximum number of children is 32. By default it is 8.
>>    
>>
>
>Hm. I definitely remember reading on mailing list suggestions to run  ser with as many
>as hundreds children to avoid situation when all workers are busy processing
>requests. That's not a valid suggestion? What would happen to messages
>when there're no idle children? Will they be dropped?
>  
>
sorry, that was a misleading info from my side, I was thinking to a 
wrong bitmask present in openser. You can start as many as children you 
want.

Daniel

>Please don't get me wrong. I'm not to undervalue your work. I just want to understand
>the limitation of the software I'm considering to use.
> 
>  
>
>>Daniel
>>
>>    
>>
>>>Thank you,
>>>
>>>Michael
>>>
>>>_______________________________________________
>>>Users mailing list
>>>Users at openser.org
>>>http://openser.org/cgi-bin/mailman/listinfo/users
>>>
>>> 
>>>
>>>      
>>>
>
>  
>