Subscriber
2017-Jan-19 14:29 UTC
[CentOS] Increase CPU usage on HV after upgrade (7.2 -> 7.3)
Hello Gordon, Wednesday, January 18, 2017, 11:52:35 PM, you wrote:> On 01/18/2017 05:34 AM, Subscriber wrote: >> Someone noticed something similar?> How is your storage arranged,It is software RAID1 + LVM> and what kind of IO patterns do those VMs > have?Do not quite understand. What do you mean?> During recent testing, I found that the read performance of software > RAID volumes was worse under 7.3 than it was under 7.2. Most other IO > had improved significantly:> https://plus.google.com/+GordonMessmer/posts/eSe6iNmk1Fs?sfc=false
Gordon Messmer
2017-Jan-19 14:57 UTC
[CentOS] Increase CPU usage on HV after upgrade (7.2 -> 7.3)
On 01/19/2017 06:29 AM, Subscriber wrote:>> and what kind of IO patterns do those VMs >> have? > Do not quite understand. What do you mean? >What at the VMs doing? Are they entirely idle? Are they doing light work, mostly reading from disks? If they're not generating disk IO, then that's not related. However, during a recent set of benchmarks, I found that disk reads were slower under 7.3 than under 7.2. That might be specific to the system I tested, or it might be related to the change you're seeing.
Subscriber
2017-Jan-19 16:21 UTC
[CentOS] Increase CPU usage on HV after upgrade (7.2 -> 7.3)
Hello Gordon, Thursday, January 19, 2017, 4:57:48 PM, you wrote:> On 01/19/2017 06:29 AM, Subscriber wrote: >>> and what kind of IO patterns do those VMs >>> have? >> Do not quite understand. What do you mean? >>> What at the VMs doing?Its gateway from local network to Internet> Are they entirely idle?At work time - No. Another time in most - Yes> Are they doing light > work, mostly reading from disks? If they're not generating disk IO, > then that's not related.Well no. They are not loaded the disc(s). No heavy for write operations.
Seemingly Similar Threads
- Increase CPU usage on HV after upgrade (7.2 -> 7.3)
- Increase CPU usage on HV after upgrade (7.2 -> 7.3)
- Increase CPU usage on HV after upgrade (7.2 -> 7.3)
- [CentOS-virt] Increase CPU usage on HV after upgrade (7.2 -> 7.3)
- Increase CPU usage on HV after upgrade (7.2 -> 7.3)