I've been handed a graph that comes from SolarWinds showing top wait events broken down by day. The last 2 days there's a part of the daily color coded bar representing a total of 3 hours for ASYNC_NETWORK_IO. Still trying to see if I can get access to Solar Winds panels to try and see if it offers a drill down into the graph or not.
I've been searching through google, websites and documentation for the last 2 hours and finding little of consequence to tell me how to drill down into this 3 hours.
Is it one large block, is it a few minutes here and there through out the day, does it match any particular window of high I/O activity (data warehouse refresh or something).
All I have is "here, there's a total of 3 hours of this wait yesterday and the day before, now tell me why" - and I must admit I really don't have any idea on how to drill down into this any further.
I've read all sorts of articles about "Well, it's usually a poorly designed application" or something along those lines.
Funny this is of the last 7 days, the first 5 are all clear. No signs of this wait. Suddenly there's a huge chunk of it. I need to know how I can dig more.
As far as I'm aware there are no user complaints about system performance.
Is there a DMV or something to help out here ?
Anyone able to give me some pointers?