It was found that the software NIC team created in Centos was having
issues due to a failing network cable. The team was going berserk with
up/down changes.
On Fri, Jul 3, 2020 at 10:12 AM Erick Perez - Quadrian Enterprises <
eperez@xxxxxxxxxxxxxxx> wrote:
> Hey!
> I have a strange condition in one of the servers that I don't where to
> start looking.
> I login to the server via SSH (cant doit any other way) and anything that
> I type is slow
> HTTP sessions timeout waiting for screen redraw. So, the server is acting
> "slow".
>
> server is bare metal. no virtual services.
> no alarms in the disk raid
>
> note: server was restarted because of power failure.
>
> Some outputs from this server that is a mail server:
> [root@correo ~]# top
> top - 09:54:43 up 23:51, 2 users, load average: 0.18, 0.23, 0.28
> Tasks: 210 total, 1 running, 209 sleeping, 0 stopped, 0 zombie
> %Cpu(s): 0.2 us, 0.1 sy, 0.0 ni, 99.8 id, 0.0 wa, 0.0 hi, 0.0 si,
> 0.0 st
> KiB Mem : 32606084 total, 25106412 free, 5932244 used, 1567428 buff/cache
> KiB Swap: 16449532 total, 16449532 free, 0 used. 26282624 avail Mem
>
> **iostat**
> [root@correo ~]# iostat -y 5
> Linux 3.10.0-1062.12.1.el7.x86_64 (correo.binal.ac.pa) 07/03/2020
> _x86_64_ (4 CPU)
>
> avg-cpu: %user %nice %system %iowait %steal %idle
> 0.05 0.00 0.05 0.05 0.00 99.85
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 0.00 0.00 0.00 0 0
> dm-0 0.00 0.00 0.00 0 0
> dm-1 0.00 0.00 0.00 0 0
>
> avg-cpu: %user %nice %system %iowait %steal %idle
> 0.05 0.00 0.05 0.05 0.00 99.85
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 21.40 0.00 169.60 0 848
> dm-0 21.40 0.00 169.60 0 848
> dm-1 0.00 0.00 0.00 0 0
>
> avg-cpu: %user %nice %system %iowait %steal %idle
> 0.60 0.00 0.05 0.45 0.00 98.90
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 1.20 16.80 0.00 84 0
> dm-0 1.20 16.80 0.00 84 0
> dm-1 0.00 0.00 0.00 0 0
>
> avg-cpu: %user %nice %system %iowait %steal %idle
> 0.05 0.00 0.00 0.05 0.00 99.90
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 8.00 0.00 100.20 0 501
> dm-0 9.00 0.00 100.20 0 501
> dm-1 0.00 0.00 0.00 0 0
>
> avg-cpu: %user %nice %system %iowait %steal %idle
> 0.45 0.00 0.35 0.05 0.00 99.15
>
> Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn
> sda 1.00 0.80 3.20 4 16
> dm-0 1.00 0.80 3.20 4 16
> dm-1 0.00 0.00 0.00 0 0
>
>
> **dstop**
> [root@correo ~]# dstat -cd --disk-util --disk-tps
> ----total-cpu-usage---- -dsk/total- sda- -dsk/total-
> usr sys idl wai hiq siq| read writ|util|reads writs
> 1 0 99 0 0 0| 20k 17k|0.14| 1 1
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 4 0 84 11 0 0|2512k 228k|52.3| 123 2
> 31 4 58 7 0 0|1912k 1026k|38.1| 132 23
> 0 0 99 0 0 0| 0 0 | 0| 0 0
> 1 0 99 1 0 0|4096B 3819k|22.5| 1 270
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 13 1 83 4 0 0| 148k 2304k|15.3| 18 214
> 1 0 98 1 0 0| 140k 499k|9.70| 14 8
> 26 5 69 0 0 0| 0 1260k|1.30| 0 46
> 56 7 38 0 0 0| 0 204k|0.30| 0 12
> 14 11 75 0 0 0| 0 0 | 0| 0 0
> 22 10 68 0 0 0| 0 0 | 0| 0 0
> 16 10 71 3 0 0| 192k 37k|14.0| 12 2
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 152k| 0| 0 2
> 0 0 100 0 0 0| 0 0 | 0| 0 0
> 1 1 98 1 0 0| 16k 2569k|14.8| 1 207
> 1 1 98 0 0 0|4096B 0 |1.10| 1 0
> 1 0 99 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 600k|1.30| 0 51
> 2 0 98 0 0 0| 0 0 | 0| 0 0
> 4 0 96 0 0 0| 0 0 | 0| 0 0
> 0 0 100 0 0 0| 0 0 | 0| 0 0
>
>
>
> --
>
> ---------------------
> Erick Perez
> ---------------------
>
--
---------------------
Erick Perez
Quadrian Enterprises S.A. - Panama, Republica de Panama
Skype chat: eaperezh
WhatsApp IM: +507-6675-5083
---------------------
_______________________________________________
CentOS mailing list
CentOS@xxxxxxxxxx
https://lists.centos.org/mailman/listinfo/centos
