I've got an ideapad 700 by Lenovo, which has an i7 and NVMe, 12 GB RAM. Now everything runs fine and the whole system is quite fast - after almost 4 years. From time to time when I start a backup job, it can slow down the whole system and I really don't understand it.
As I said it has an NVMe an should therefore be quite performant - but if you look at this screenshot, it looks like that it's running on an very old hdd:
First of all, backup job runs fine (say 200 MB/s) but as time goes on, the throughput drops until you have 20 MB/s after the job has finished. During the job, you really cannot work on this machine because everything takes really forever (e.g. you wait 10 seconds until even start-menu would appear and such crazy stuff). If you abort the job, the metrics go back to normal. In the screenshot we see a very high latency (last column) of seconds (!!!), which is too slow for the mentioned disk type, veeam agent reads the most data of all processes. We also see that there is a IO of 11 MB/s, which is also very little BUT we see 100 % disk usage (blue rectangle). I read multiple articles about windows search service and that stuff, but as I said when veeam doesn't do the backup, everything goes back to normal.
Has anybody an idea what's going on? Can maybe someone explain me the story behind the 100 % disk activity? Are there so many disk operations that some kind of queue would get full, but such little datatransfer so that it would end in only 11 MB/s?
Thanks very much!