Kolab / Roundcube very slow

[Young, Marcus]

Thank you for everybody for the guidance.... so the solution. 

Reviewing the logs showed that curl was having a DNS issue and timing
out before presumably falling back to a secondary lookup (as the
application was still working - but slow). Hunting around the network
identified a failed DNS server ... restoring the server resulted in a
dramatic improvement to Kolab. Not sure why DNS was required to open
emails, but this certainly seems to have corrected the issue. Thank you
again for all the assistance. 

On 21/12/2015 20:56, Andy Kopciuch wrote: 

> On Monday December 21 2015 11:13:25 Young, Marcus wrote: 
> 
>> Hi All,
>> 
>> we have been testing Kolab as a replacement for Zimbra. The main issue
>> we have is that the interface (Roundcube) is really really slow - almost
>> unusable. When clicking on an email to view it can take upwards of 20
>> seconds to display. I assume that there is a configuration issue - but I
>> have no idea where to look. I have worked through a number of "fixes"
>> such as
> 
> There could be lots of different things causing this in your particular setup.
> 
> - How many users experience this, or is it only you?
> - How many users in total, and how many simultaneous users (how high is the 
> server load)?
> - Is the slowness only in roundcube, are IMAP operations with other clients 
> operating normally?
> - Is the slowness in all folders, and all messages, or only particular folders 
> and/or messages.
> - How is roundcube configured to connect to IMAP?
> - Is the webmail over http:// or https://
> - Is this limited to one particular browser, or all browsers?
> - Is this connecting on an internal network, or public IP?
> - Is the DNS, hostname, etc. configured properly?
> - Is this a virtual server? Or physical hardware? What kind of hardware / 
> CPU, Memory, etc.
> 
> The last deployment I did a few months ago was ubuntu 14.04, and it has been 
> running without issue.
> 
> Andy
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