Cacti script_server index invocation

Hi,

I've tried the same question in the forums (http://forums.cacti.net/viewtopic.php?f=21&t=54713) for the last couple of days with no reply, I hope someone can pick it up here.

I don't recall encountering this in the docs nor the FAQs, if it's there please enlighten me and if not IMHO it belongs there.

I have a very expensive script server "index" query, one I want to do as seldom as possible.
When does an index query called? once? whenever num_indexes change? can I set it up to only manually as num_indexes is equally as expensive.

Thanks, Bye, Nitzan.

------------------------------------------------------------------------------