Cactid is a poller for Cacti that primarily strives to be as fast as 
possible. For this reason it is written in native C, makes use of POSIX 
threads, and is linked directly against the net-snmp library for 
minmumal SNMP polling overhead. Cactid is a replacement for the default 
cmd.php poller so you must decide if using Cactid makes sense for your 
installation.

WWW: http://www.cacti.net/cactid_info.php