Kolab / Roundcube very slow

[Timotheus Pokorra]

Hello Mark,

> 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
>
> https://wiki.archlinux.org/index.php/Kolab#Web_interface_is_slow_when_accessing_IMAP_folders
>
> But so far no luck.

Anything unusual in the log files? /var/log/maillog, or /var/log/roundcubemail.

Have you considered trying an IMAP Proxy:
https://kolab.org/blog/timotheus-pokorra/2014/12/15/kolabroundcube-nginx-imap-proxy-centos6

> We are running the latest version on Ubuntu 14.04
Not many people in the community are using Kolab on Ubuntu. Most are
using CentOS or Debian. This statement is not verified, I might be
wrong, but that is what my gut feeling tells me. At least the most
contributing people are not using Ubuntu.

You should try if it works better on Debian, or if you not unfamiliar,
with CentOS, which is the primary target platform for Kolab.

hope this helps,
  Timotheus