Hello,

I've seen the issue here http://www.gametracker.com/games/csgo/forum.php?thread=91691 for server that have more than 55 players the scan sometimes doesent work.

But how can you explain for first 3 CSGO server on the top , why their servers are scanning all the time ?

Is it there anyway to improve the server to be scanned all the time ? I am quite nervous about that every 10 mins my server is down because of this.

We do not develop the game.
If you want answers about the game code you must contact the game developers.

If you have a question about how some server owners have fixed the issue, I suggest that you ask them directly through their server pages or clan pages.
Alternatively, you could ask the question in the CSGO forum and see if any server administrators can offer advice;
http://www.gametracker.com/games/csgo/forum.php?category=128837

If you do find a solution that works, please try to make sure it is published in the CSGO forum for the benefit of others.
We would also be able to add it to the CSGO connection thread for future reference.

Good luck.

After more than three years, the game developers have not fixed it to my knowledge. I don't know what exactly triggers the issue beyond 55 players since not all servers have the same problem. But there is literally nothing we can do on our end. Maybe the best you can do is try to replicate the settings of an OK server and see if it helps.