how many wordpress blogs can i install in 2GB Dedicated server?. how much RAM does wordpress actually used?.
It depends on many things like: traffic code quality caching installed plugins web-server hardware ... etc
currently i'm using kimsufi 2G. let's say the traffiic per web is 200uv/perday has caching. at most 7-8 plugins. e.g capcha, contact form, ip-blocker, etc. using apache. openVZ virtualization mysqld is optimized using kloxo control panel
prob could handle a small or average site. wont be able to handle any heavy load scripts or high traffic sites
With only 200UV a day it could probably handle at least 10 blogs with no problem, and well over that if the plugins are light enough!
currently my server is using about 600MB-800MB only. i think i need to use lighttpd instead of apache to save RAM. my dedicated server is currently split into 2 VPS. is that a good idea?
Very Good points mentioned by RoseHosting, completely agree with him, How many WordPress domain you can install in 2 GB, its completely depends on the following points mentioned by RoseHosting: traffic code quality caching installed plugins web-server hardware ... etc
In terms of memory, since Wordpress is written in PHP, you could add the "memory_get_peak_usage" function to the script and then visit your page: php.net/manual/en/function.memory-get-peak-usage.php
10K unique visitors per day? If that's for 1 site, I'd say that's heavy enough that you might want to move the database to another server and make remote connections to it. An Atom processor with 2GB RAM is pretty much as powerful as a decent netbook.
Intel E8400 2x 3.00 GHz 4 GB RAM let's say i'm going to have 20 blogs in this server. how much traffic it can handle before it the server start to lag or worse crash?. for now my total traffic for all the blogs have not reach 10K yet.