Scaling A Website-Expand Database
Needing to scale your website can be a good thing. This means that the amount of traffic has jumped up and you need to basically add more "support" to hold the site up. This can be done by making the database larger to suit all the traffic coming in. No one wants to go to a website and have it freeze or crash all the time; that's just not good for business.
Now while scaling you must consider the server you are using and your specific needs for that server. If all else fails just find someone that knows about web development that can assist you and help guide you in the right direction. Once your site is scaled then the website will run more efficiently and therefore bring in even more traffic.
Photo source mikecogh