HOWTO : Performance tuning for PostgreSQL on Ubuntu/Debian

Step 1 :
Edit postgresql.conf.
sudo nano /etc/postgresql/8.3/main/postgresql.conf
Step 2 :
The performance tuning setting is as the following :
(1) shared_buffers
Recommended : 0.25 * Available Memory
(2) work_mem
Recommended : Available Memory / max_connections
(If your queries tend to be more complicated, then divide that by 2. If you typically run very close to max_connections connections, then consider dividing by 2 [...]

Green Computing with Proxmox VE 1.2 and 3ware

Proxmox VE 1.2 is running Kernel-based Virtual Machine (KVM-85) and OpenVZ on Debian 5.0. It is a 64-bit system and works with virtualization capable CPU. It equipped with a web-based control panel and allows you to create, delete and modify the virtual guests from it. You can also backup the virtual guests [...]