Piwik performance problem


I installed Piwik (3.0.4) on a RHEL 7 machine (Apache/2.4.6, PHP 7.0.10, Mysql Com. Srv 5.7.18 --> DB “piwik” has a size of 0.7969 MB). After set-up Piwik loads very slowly (pages load in 60-80 sec).

First I had a problem with the images, I haven’t seen them. After commenting all lines of “…plugins/.htaccess” File, they appeared.

memory_limit = 512M

What can be the reason, has someone an idea?

Thanks and regards

Which requests take so long to load (have a look at firebug or chrome developer tools)?