Centos 7 keeps freeing up?

homer_3 · 11-11-2019, 09:10 AM

I have a fairly fresh install of Centos 7 and it keeps randomly freezing up for ~30 seconds at a time. Like I'll be trying to tab complete something in the terminal, and the whole machine will lock up for a while or I'll be scrolling down throw a small text file in vim and again it will just lock up. I tried keeping top up to see if something is spiking the CPU, but top freezes too and when it comes back, it's not showing anything even above 10%.

I'm wondering if it's some kind of power save on the HDD but I can't find any power save settings anywhere. Anyone else see anything like this and know how to fix it?

colorpurple21859 · 11-11-2019, 09:18 AM

How much memory do you have? Is this something that had started recently. Possibly memory or drive going bad? Was there a reason for a fresh install?

homer_3 · 11-11-2019, 09:37 AM

It's a brand new machine (~2 months old) with an i7-8700 and 16GB RAM. I didn't really notice it happening when I was setting it up, but didn't really use it too much until last week, but I didn't notice this issue until today. Only difference is today, I'm using it directly instead of remoting into it, but you'd think it'd perform better in that case.

Also ran badblocks but it didn't find anything.

colorpurple21859 · 11-11-2019, 10:55 AM

Quote:

I'm using it directly instead of remoting into it, but you'd think it'd perform better in that case.

That is strange, maybe a video driver problem, since it is worse when using the machine directly.

voleg · 11-11-2019, 11:06 AM

Pressing TAB for bash completions utilize /tmp.
Please check that /tmp is tmpfs, that it is not full, that you have any size swap exist.
It is not a virtual machine, correct ?
Also check /var/log/messages for SATA errors, then play with SATA cables if you have them.

colorpurple21859 · 11-11-2019, 11:37 AM

what is the output of df

homer_3 · 11-11-2019, 12:16 PM

Didn't see anything in /var/log/messages. Checked right after a freeze too. It happens most often with tab, but also happens when doing other things like navigating vim. No, it's not a VM. I don't know how to check that /tmp is tmpfs.

df output is

Code:

Filesystem              1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root  52403200 6525440  45877760  13% /
devtmpfs                  8029356       0   8029356   0% /dev
tmpfs                     8046596       0   8046596   0% /dev/shm
tmpfs                     8046596    9440   8037156   1% /run
tmpfs                     8046596       0   8046596   0% /sys/fs/cgroup
/dev/sda3                 1038336  180824    857512  18% /boot
/dev/sda1                  763904   51056    712848   7% /boot/efi
/dev/mapper/centos-home 149091200 2306288 146784912   2% /home
tmpfs                     1609320      68   1609252   1% /run/user/1000
/dev/sr0                  4414592 4414592         0 100% /run/media/<user>/CentOS 7 x86_64

jsbjsb001 · 11-12-2019, 06:18 AM

You could check your drive(s) with smartctl to see if that might give you any hint about any possible drive problems.

Code:

smartctl -a /dev/sdX

(replace "sdX" with the actual device node for the drive(s) in question)

While it's a bit of a long shot, you could also check for any hints from libata.

Code:

dmesg | grep -i ata