SoftIRQ Only Struggling One CPU at 100% (KVM)
SoftIRQ Only Struggling One CPU at 100% (KVM)
https://forum.directadmin.com/threads/softirq-only-struggling-one-cpu-at-100-kvm.64040/?utm_source=chatgpt.com
Hi there,
Issue: websites/mails do not open fast till backups transfer finished.
I migrated from Cpanel to DA and everything was great except Backups.
I changed from CentOS 7 on a dedicated server to Centos 8 X86 64 Min Gen2 V2 on a virtual server (KVM) with 6 cores and 32gb ram.
I am using BlackBlaze and Onedrive to transfer backups files to. I use Rclone to backup and transfer out.
Both cases softirq seems to be at 100% over one CPU (cpu 1). The rest of CPUs have zero softirq usage. CPU usage is about 30% when transfering files to BlackBlaze/Onedrive all the time.
When transfering, server seems to delay websites loading giving timeout as an answer (about 5 min). No access at all or too slow.
But load is 30% and ram is low usage. Seems to be a network issue.
- What do you think?
- Maybe a Kernel issue? I found this article https://access.redhat.com/sites/default/files/attachments/20150325_network_performance_tuning.pdf
- Rclone is not multithreading?
- I use NETDATA to monitor this server.
I share whit you some data from my server:
Thanks in advance!
I think this link may explain to you more:
Why is ksoftirqd/0 process using all of my CPU?
I was feeling Ubuntu was running a bit sluggish, and then I went to see the processes running on it, and found one which was using something like 50% of CPU called ksoftirqd/0. Does anyone know w…
there is a lot of steps for workaround.
Thanks Ben, I found the same link yesterday!
when you debug your system use direct command, not NetData(it’s also taking i/O)