Higher %wa value is not exactly same as i/o abusers?

postcd · 05-02-2014, 05:53 AM

Hello,

several hours i have %wa value at around 20%

probably because of script which backup virtual machines (vzdump)

iotop (some writing goes up to the disk write limit (around 45Mb/s)
http://i.snag.gy/yjYRw.jpg

i want to ask if you can advice me any more command tools to track the exact cause of high %wa

unSpawn · 05-03-2014, 05:43 AM

Please post your thread once and in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. In my humble opinion this thread should be closed (or merged) because in essence it is a duplicate of https://www.linuxquestions.org/quest...ge-4175503702/.

sundialsvcs · 05-03-2014, 07:42 AM

If you are "backing up virtual machines," then such a process obviously will generate as many disk-writes as it can manage to do. What is the problem that you are trying to address? Where and why and what does it hurt?