Linux – 384 MB enough for a starter VPS

apache-2.2linuxmemoryruby-on-railsvps

I'm considering to rent a VPS with 384 MB memory. It would run on CentOS and would have cPanel with Apache 2 / MySQL and Phusion Passenger with nginx / sqlite.

What do you think, will it have enough memory? It would serve around 10 small traffic PHP/MySQL websites and 3-4 small traffic Ruby on Rails app.

Thanks for your suggestions.

Best Answer

That really depends on your applications. You might want to consider running a VMWare image with the same OS and amount of memory allocated, deploying your 10 or so small websites to that image, and running a stress test against the image that emulates the approximate traffic you expect.

Related Solutions

Vps – Running Ruby on Rails App on Apache + Passenger == to much memory

You can configure how many Rails processes Apache/passenger spawns. For your size (3 concurrent requests) you should be fine with 2 rails processes:

Set these in your apache config:

PassengerMaxPoolSize 2
PassengerMaxInstancesPerApp 2

The MaxPoolSize determines how many instances can be started maximally, the MaxInstancesPerApp determines how many instances each web-app can have.

You might want to play with:

PassengerPoolIdleTime

to specify how many seconds an instance must be idle before it is unloaded. Default is 300 seconds.

I run pretty high traffic web application with 3 instances without any problems.

Oh and - the Ruby Enterprise Edition helps too.

How much memory should the rails stack be consuming

It all depends on the applications you are trying to host. The more models / controllers an application has the bigger the application will be. To get a better feel for how much the rails application itself is using try issuing the command.

passenger-memory-stats

My medium-sized application at this moment is using:

### Total private dirty RSS: 68.93 MB

According to passenger. If you have a bunch of sites running on the same passenger instance it could look more like:

### Total private dirty RSS: 1489.46 MB

Also consider that if you run a stock mysql-server the settings are not really optimized for VPS (and thus low memory) usage.

Best Answer

Related Solutions

Vps – Running Ruby on Rails App on Apache + Passenger == to much memory

How much memory should the rails stack be consuming

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