It should be fine. Every 30 seconds (or more often), the XI UI, depending in the page that is refreshing, will make at least one status call, if not more. As long as you are not asking the backend for brevity=1 calls every 3 seconds you should be ok. The larger the configuration, the longer the XI box will take to put together the xml from sql queries. I have a little visualization plugin I have been writing that calls a query that joins fields from two of the larger tables every 15 seconds. With 500 hosts and 2000 checks it works fine.
It really depends on:
1. How much work the call asks sql to perform
2. The overall size of the installation (especially for the larger hoststatus/servicestatus brevity=1 calls)
3. How often the backend call is performed.
Backend API Question
Re: Backend API Question
Former Nagios employee
"It is turtles. All. The. Way. Down. . . .and maybe an elephant or two."
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"It is turtles. All. The. Way. Down. . . .and maybe an elephant or two."
VI VI VI - The editor of the Beast!
Come to the Dark Side.