Hi Erick,
what was the value of 'si' in top ?
Best Regards,
Strahil Nikolov
На 3 юли 2020 г. 18:48:30 GMT+03:00, Erick Perez - Quadrian Enterprises <eperez@xxxxxxxxxxxxxxx> написа:
>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
>> ---------------------
>>
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