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Should I use a 32 or 64 bit server?

What are the limitations of using a 32-bit linux server?

Is it worth the trouble to setup a 64-bit server if the site will not be huge?

Just to clarify, this would be a dedicated server for running askbot.

We're talking about roughly 1,500 users (not concurrent!) and maybe 10K questions.

I suspect that 32-bit would be fine for my particular scenario

Benoit's avatar
updated 2010-09-30 07:26:54 -0600, asked 2010-09-29 14:21:59 -0600
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I frankly don't know at how many visitors per day you absolutely need the 64 bit. For a small team you won't need the 64 bit server.
Evgeny's avatar Evgeny (2010-09-29 14:50:13 -0600) edit
You can try on 32 bit, see how it works and if necessary - transfer data onto a bigger server. There is nothing in the askbot code that requires 64 or 32 bit so it will work fine on both.
Evgeny's avatar Evgeny (2010-09-30 12:12:35 -0600) edit
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1 Answer


This decision depends on a few aspects of your goals on running a server.

  • What kind of service will run on the server? How much RAM will this service consume, even in a scaled scenario (10, 100, 1000, 10,000 concurrent user). Do you need more than 4 Gbytes of RAM? -> 64bit or use a 32bit PAE Kernel if available (Ubuntu and Debian both have a (PAE) BigMEM Kernel available)

  • What kind of math operations will be present? Do you need a high precision or calculate complex things? -> 64bit.

  • Do you need to run a database server? In most cases, DB server do a lot of their work in your RAM and they do complex math ops. Go 64bit, be ready for the future.


  • Be sure that everything you need is available in 64bit version. Combining both worlds leads to a disadvantage. If anything is not available in 64bit, check the consequences.
xenji's avatar
answered 2010-09-30 01:37:53 -0600
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