I just checked database mirroring , in Principal server the status for each database is “Principal , Syncronized “ and in mirror server , each database is “ Mirror, Syncronized”

Does it mean it is Synchronous type ?

The sql server is SP2 with CU 12 and patched last year .

Target server memory is the same with Total server memory = 41.906 MB (41 GB)

I don’t know how to check redo and send queues . Can you please point out how to check them ? what is the benefit knowing them?

Thanks so much for the links