Slow server... do I really need to upgrade?

Need to hear the voice of experience as I am surprised with such a big server I am having so many problems:

I am on a dedicated server with:
- Intel(R) Pentium(R) 4 CPU 2.00GHz
- 1G RAM
- Linux - Apache - Ensim

And I have:
10GB of thansfer per day
700000 pages per day
28000 emails sent per day (postcards).
6000 forum generated pages per day (phpBB -using php & MySQL).


The most server intensive thing, I guess, might be the use of the mail server, 28000 emails per day, but doing math that is not that much: just 19 emails per minute.

Forums can be quite intensive, but it's only occupying about 2% of the server requests...

Emails: Just plain emails with a link to the page. Sort of a cheap postcard. No data is being keept on the server, MySQL, etc... it's like a simple "tell a friend" email.


I am having to reboot the server a minimum of 3 times per day, as it get's really slow.
Forum is closed at peak hours or when server is slow.

Does it make sense to have so many problems on a server with a processor at 2GHz and 1 Gig of RAM? Or is something weird going on here?

Thanks.

 

 

 

 

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