If you are using my script to install Zabbix, and don’t intend to add anything else to the Zabbix server, then you can partition your disk as follows:
|Disk Partition||Disk Space|
|swap||2x memory (ie. if 1 gig memory, then 2 gig)|
|/var||all remaining disk space|
Generally I don’t like having data on the root partition, so I put it in /var instead. This has worked pretty well for me in my installations.