Threads - create new or reuse?

General JUCE discussion
1

I am now delving into Threads for the first time with JUCE (aside from using the Timer class). 

I am creating a class that interacts with a database over HTTP.  I need to have it running on a background thread. 

Would it be better to have each instance have its own thread, that terminates when the data has been returned, or all share the same thread?

2

If you're starting and stopping threads very frequently, then you might be better using a thread pool, but otherwise it's usually fine to just start one when you need it.