Cyrus tweaks (slow on roundcube)

[signaldeveloper at gmail.com]

When I installed havaged the process died instantly and gives me a locked sub system. If I restart it again, instantly dies again. Im on centos. Any ideas why this is happening?
 Anyone else experienced this?

- Paul

> On Sep 11, 2015, at 1:54 PM, Andre Felipe Machado <andremachado at techforce.com.br> wrote:
> 
> Hello, 
> We setup haveged threshold at 2048 (its max pool size is 4096 , afaik) for our
> high load cyrus imap servers.
> At our cyrus imap servers the depletion bursts are amazing.....
> Watch the entropy available during your peak ours and you will get an overview
> of your needs.
> Regards.
> Andre Felipe
> 
> 
> signaldeveloper at gmail.com wrote ..
>> Andre,
>> 
>> Really? What should it be? I was curious and checked.. Entropy on some of my other
>> big time production servers for email is only about 200) and its lightning fast?
>> 
>> - Paul
>> 
>>> On Sep 10, 2015, at 5:00 PM, Andre Felipe Machado
> <andremachado at techforce.com.br>
>> wrote:
>>> 
>>> Hello,
>>> Entropy of 158 is way too low for production servers. And this *MAY* cause weird
>>> slowness without logging any  errors.
>>> You could install "haveged" and configure for max threshold levels on production
>>> servers.
>>> https://packages.debian.org/search?keywords=haveged
>>> 
>>> Regards.
>>> 
>>> Andre Felipe
>>> http://www.techforce.com.br
>>> 
>>> 
>>> 
>>> signaldeveloper at gmail.com wrote ..
>>>> Rudy,
>>>> 
>>>> Entropy is 158 I just looked. And as far as compiling against urandom, to be
>>> honest
>>>> I'm
>>>> not sure. 
>>>> 
>>>> - Paul
>>>> 
>>>> 
>>>> 
>>>> 
>>>>> On Sep 6, 2015, at 9:50 PM, Rudy Gevaert <Rudy.Gevaert at UGent.be> wrote:
>>>>> 
>>>>> 
>>>>> Quoting signaldeveloper at gmail.com, Mon, 07 Sep 2015:
>>>>> 
>>>>>> Hosts file is fine I checked that, thanks. Kolab uses 389 to  
>>>>>> authenticate for everything, so Cyrus is using LDAP as you can see  
>>>>>> above. I think the problem lies in the constant TLS logins into  
>>>>>> Cyrus for every click:
>>>>>> 
>>>>>> imap[2281]: login: localhost [::1] johndoe at domain.com PLAIN+TLS User  
>>>>>> logged in  
>>>>>> SESSIONID=<es1.domain.com-2281-1441500890-1-15740725055571902363>
>>>>>> Sep  5 20:54:51 es1 imap[2281]: USAGE johndoe at domain.com user:  
>>>>>> 0.009998 sys: 0.006999
>>>>>> 
>>>>>> 
>>>>>> Again its only one user, on roundcube... I am afraid to put any more  
>>>>>> users on it. There doesn't seem to be much of performance tweaks  
>>>>>> with Cyrus around the web either...
>>>>> 
>>>>> does your system have enough entropy?
>>>>> 
>>>>> Is saslauthd compiled against /dev/urandom?
>>>>> 
>>>>> Rudy
>>>>> 
>>>>> -- 
>>>>> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>>>>> Rudy Gevaert                             e-mail: Rudy.Gevaert at UGent.be
>>>>> Directie ICT, Afdeling Infrastructuur
>>>>> Groep Systemen                                      tel: +32 9 264 4750
>>>>> Universiteit Gent                                   fax: +32 9 264 4994
>>>>> Krijgslaan 281, gebouw S9, 9000 Gent, Belgie               www.UGent.be
>>>>> -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
>>>>> 
>>>>> 
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