How do you do Load Testing and Capacity Planning for Web Sites
I want to move from VPS to Dedicated Server I guess that VPS specifications are not equal to Dedicated Server and I predict that Dedicated server can make more work with less power.
Current VPS usage: CentOS 6.2 Plesk 10.4.4 I use IP Board forum (3.3), that use a lot of database connections (150+ simultaneous connections for now)
Current VPS specs option 0: AMD Opteron 6128 8-Core Processor with 2.0GHz, 6400MHz HT, 8 x 512KB L2 Cache I use just 4 cores at 2,5Ghz (total) with 3GB RAM
Dedicated Server option 1 Intel Core i3 2130, 2x2(HT)x3.4+ GHz, 3 MB L2 16 GB RAM
Dedicated Server option 2 Intel Core i5-2400, 4x3.1+ GHz, 6 MB L2 - QPI 5 GT/sec 16 GB RAM
The price I pay now for my VPS abstraction is the same as the option 1. My question is it's equivalent the power of CPU of option 0 vs option 1. Which has more power? The pick of usage now is 75-95% depends of the day. It will be low with Dedicated Server option 1 and with option 2?
I dont expect exact benchmark info, I just want some suggestion about the difference. Will I note the difference at the change? Any related info will be appreciated.