[horde] Horde performance with ActiveSync?

[Sebastian Arcus]

On 10/04/18 15:41, Arjen de Korte wrote:
> Citeren Sebastian Arcus <s.arcus at open-t.co.uk>:
> 
>> I have a Horde 5.2.17 + PHP 5.6.35 + Postgresql 9.2 + Lighttpd 1.4.49 
>> with 10 iPhones/iPads in ActiveSync/Exchange mode. The users have 
>> fairly large Inboxes - some of them of 20 000+ emails. On IMAP that is 
>> not causing any issues, and hardly any load on the server.
> 
> Which IMAP server do you use? Is it local to the webserver?

Thank you for replying. I use Dovecot which runs on the same server as 
Horde.

> 
>> It is the first setup I am doing with more than 1-2 devices in 
>> Exchange mode, and I am trying to get a sense of what performance is 
>> 'normal' or expected.
> 
> The load should be negliable for just two devices. What are the 
> $conf[activesync] settings from horde/config/conf.php?

Two devices is what I run on the other Horde setups I have. This one has 
10 iPhones/iPads.

Here are the ActiveSync settings:

$conf['activesync']['params']['driverconfig'] = 'horde';
$conf['activesync']['storage'] = 'Sql';
$conf['activesync']['emailsync'] = true;
$conf['activesync']['version'] = '14.1';
$conf['activesync']['auth']['type'] = 'basic';
$conf['activesync']['autodiscovery'] = 'full';
$conf['activesync']['outlookdiscovery'] = false;
$conf['activesync']['logging']['type'] = false;
$conf['activesync']['ping']['heartbeatmin'] = 60;
$conf['activesync']['ping']['heartbeatmax'] = 2700;
$conf['activesync']['ping']['heartbeatdefault'] = 480;
$conf['activesync']['ping']['deviceping'] = true;
$conf['activesync']['ping']['waitinterval'] = 15;
$conf['activesync']['enabled'] = true;


> 
>> The server is only an Intel Core2 4400, with not too much other load 
>> on it, but since configuring Horde with ActiveSync it is spending 
>> almost all the time with 2-3 php-cgi processes, each with 30%-50% cpu 
>> core load. There is virtually no access through the Horde web 
>> interface, so it seems to me that these php-cgi processes are serving 
>> exclusively ActiveSync sessions.
> 
> Each device connected through ActiveSync will have its own process on 
> the server for as long as the device is connected. But the load of these 
> processes should be minimal.
> 
>> I know it can be a vague question, or at least one with a complex 
>> answer, but would anybody with experience in running Horde with 
>> ActiveSync say that the above load sounds about right? I have 
>> implemented as many of the Horde tuning tips I could implement so far 
>> - and I am happy to look into tweaking things further. But if 
>> ActiveSync with Horde is just heavy on the cpu anyway, I will just 
>> look into upgrading the hardware.
>>
>> Any advice gratefully appreciated.
> 
> See also https://wiki.horde.org/activesync for recommendations on what 
> extensions for your IMAP server you should be looking for.
> 
>