# Server Specs for deployment **URL:** \ **Category:** Deployment\ **Created:** [May 14, 2008, 11:59pm UTC](https://www.ruby-forum.com/t/server-specs-for-deployment/137646 "2008-05-14T23:59:02Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![bigdaddy71](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bbe5ce/32.png) [@bigdaddy71](https://www.ruby-forum.com/u/bigdaddy71)\ **Post date:** [May 14, 2008, 11:59pm UTC](https://www.ruby-forum.com/t/server-specs-for-deployment/137646/1 "2008-05-14T23:59:02Z")
The rails app I have created is an online assessment for 3rd - 5th graders. When the project goes into production there will be 300-400 kids accessing the site at the same time. I have been speeking with several hosting companies and the last one I spoke with suggested measuring the memory usage for one user and multiply that by the number of users (300-400). Then they will give me suggestions on what I should be using for a hosting package. Does anyone know how to check the memory usage of the rails app? I have never worried or have had to deal with this before and am lost. This is the first app I am deploying. Or does anyone have suggestions on hosting packages that would be suitable for 300-400 users hitting the site at once. I am guessing a dedicated server will be needed but I am also trying to do this low cost without having the site be extremely slow. Any suggestions? Thanks in advance! Chris ---
**Author:** ![bigdaddy71](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bbe5ce/32.png) [@bigdaddy71](https://www.ruby-forum.com/u/bigdaddy71)\ **Post date:** [May 15, 2008, 1:42pm UTC](https://www.ruby-forum.com/t/server-specs-for-deployment/137646/2 "2008-05-15T13:42:01Z")
Chris, ``` I haven't seen in my rails applications a linear correlation ``` between users and memory, not sure how is coded yours. ``` The memory of healty rails process starts around 40MB and goes up ``` to whaetever the garbage collector allows. In my case have seen that this processes (thin, mongrels) stay around 80MB, this will depend on your app. ``` You will need at leats a couple of mongrels, thins, whatever to ``` run your site. Adding a bunch of mongrels withouts supporting cores usually wont help, don’t runn to start too many mongrels at first. ``` I have found that a basic VPS setup for a rails app with a ``` moderated traffic, supporting a couple of mongrels, nginx in the front, database and Monit or God for monitoring requires 384 MB, but you can make it fit 256 MB if you fine tune it and you are short on cash. ``` I would recommend starting with such configuration, having a clear ``` option to add more CPU and Memory if required, keeping an eye in the logs, and caching where necessary. Check with your hosting company. ``` Off course if you can afford a dedicated server as starting point, ``` just go and get it. An easy way to make this scale is using virtualization to configure it as separated servers, database, web, application, etc. But that is another discussion. ``` Best regards, ``` – Aníbal Rojas > **[Home - Has Many Developers](https://hasmanydevelopers.com/)** > > We are the best choice for your building design and development > **[RUBYCORNER.COM](https://www.rubycorner.com/)** > > RUBYCORNER.COM - Contact us for any business inquiries [http://anibal.rojas.com.ve](http://anibal.rojas.com.ve) On May 14, 5:59 pm, Chris H. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![bigdaddy71](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bbe5ce/32.png) [@bigdaddy71](https://www.ruby-forum.com/u/bigdaddy71)\ **Post date:** [May 16, 2008, 2:27am UTC](https://www.ruby-forum.com/t/server-specs-for-deployment/137646/3 "2008-05-16T02:27:09Z")
Hi Chris, I’m Maykel from [SpeedyRails.com](http://SpeedyRails.com). As Anibal said, your Rails application is going to use around 40-100MB RAM per Mongrel instance depending on your code and server architecture (your application is going to use around 2x memory in 64 bits servers). Multiplying the amount of memory needed for one user per the number of users is not correct at all. The most important thing is how many Mongrel instances you have for your Rails application, since every Mongrel instance can respond to only one request at the same time (that’s why you will be always using the memory you need for one user, not for 300-400 users) you will need around 3-4 Mongrel instances to ensure your application can respond to 300-400 simultaneous users, considering you will be receiving around 100-200 requests per second (let’s say all the users won’t be clicking at the same time) and considering your application can respond to 50-60 requests per second (which is good actually, could be less). Hope this help. If you need further information about our hosting plans just send us and email, our site is been updated now but you can contact us at sales [at] speedyrails [dot] com. Thanks, Maykel – Maykel Rodriguez > **[Home - Speedyrails](https://www.speedyrails.com/)** > > Speedyrails is an AWS Advanced Consulting Partner. We leverage our extensive AWS knowledge to provide exceptional managed services. Easy to use Rails hosting ---
**Author:** ![bigdaddy71](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/bbe5ce/32.png) [@bigdaddy71](https://www.ruby-forum.com/u/bigdaddy71)\ **Post date:** [May 16, 2008, 12:17pm UTC](https://www.ruby-forum.com/t/server-specs-for-deployment/137646/4 "2008-05-16T12:17:13Z")
Get a slicehost account (or other virtual host) with 256MB of ram for twenty bucks and run ab or httperf over your app with a bit of concurrency. Then, when everything goes to hell consider adding some really basic caching. I don’t think you’ll need to stress that much - but file based caching will serve a lot of requests. Good luck. On May 16, 10:26 am, “removed\_email\_address@domain.invalid” [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)