Problem Site slow

guys my site starts to go slow ... does anyone know optimize my site? I'm already using the plugin minify but not enough ...

Visit my post bro

Enviado desde mi GT-I9300 mediante Tapatalk

You need to reduce activity feed loading to never and general notifications to never then your server will not get loaded to much. I had some problems too, but i did that and disabled some plugins too.

First, you need at least 16GB of ram. This is a must for SE, IMO. Also, a dedicated server is a must.

Can you do without the above? Yes. But if you are serious about performance, the above is the required (at least).

try to optimize with .htacess and test with google speed and gmetrix

This is the simplest method of making your SE4 faster. I tested it on 4.1.6p3 & works great & dont know about other versions. Kindly test it and tell us about the results.
Lets come to our topic.
Follow these steps.

1: Goto your site admin panel.
2: From layout editor select Site Header
3: drag HTML Block to the top of all blocks there.
4: Paste the given code in that HTML Block.

<?php if (substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip')) ob_start("ob_gzhandler"); else ob_start(); ?>

5: Save it.

You are done.

Note : Some sites might show ERROR 500. As their servers dont support gzip