Do we have any best practice for iQuery (interval polling). I can see auto-discovery is enabled and the request interval time is set to 30 sec. But not sure if that specific setting should be ideal or not? Please advise.
The default value on the request interval is suitable for most scenarios so that is usually considered best practice. Unless you have a specific problem with the monitor checking, I'd recommend leaving the interval at 30 seconds.
Any askf5 or Devcentral link if you can suggest me so I can dig more in this topic.
Here is a link to the deployment guide section on iQuery and here is a link about troubleshooting iQuery connections.
The issue of interval request times doesn't seem to come up in many documents as it is not a commonly altered setting, but these documents go a bit more into iQuery in general.