question about statistics

[emper0r]

Hi again.. just to be clear.... if I got this block disk

[root@vmtest1 ~]# lsblk
NAME              MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
fd0                 2:0    1    4K  0 disk
sda                 8:0    0   50G  0 disk
├─sda1              8:1    0    1G  0 part /boot
└─sda2              8:2    0   49G  0 part
  ├─cl-root       253:0    0 45.1G  0 lvm  /
  └─cl-swap       253:1    0  3.9G  0 lvm  [SWAP]
sdb                 8:16   0  500G  0 disk
└─mysqlvg-mysqllv 253:2    0  500G  0 lvm  /mysql
sr0                11:0    1 1024M  0 rom

Why sdb and mysqlvg-mysqllv isn't equal graphic ??

it's possible LVM create this difference when get values from vgroup and statistic from phisical disk when are in the same disk ?

[dusharu]

Hi, It's very intersting question.

I think this is sheduler error.

I try to set DebugLevel=4 in /etc/zabbix/zabbix_agentd.conf and watch log

tail -f /var/log/zabbix/zabbix_agentd.log |grep -oe '.*EXECUTE_STR() .*DISK=.*; if '

#1 measure
5774:20200721:201309.434 EXECUTE_STR() command:'DISK="sdd"; if [[ ! -b "/dev/$DISK" ]]; then DISK="$(lsblk -l -o Name,KNAME | grep $DISK |awk '{print $2}')"; fi; if
5776:20200721:201349.868 EXECUTE_STR() command:'DISK="HOME_LVM-Cloud"; if [[ ! -b "/dev/$DISK" ]]; then DISK="$(lsblk -l -o Name,KNAME | grep $DISK |awk '{print $2}')"; fi; if

#2 measure
 5775:20200721:201409.087 EXECUTE_STR() command:'DISK="sdd"; if [[ ! -b "/dev/$DISK" ]]; then DISK="$(lsblk -l -o Name,KNAME | grep $DISK |awk '{print $2}')"; fi; if
 5774:20200721:201449.513 EXECUTE_STR() command:'DISK="HOME_LVM-Cloud"; if [[ ! -b "/dev/$DISK" ]]; then DISK="$(lsblk -l -o Name,KNAME | grep $DISK |awk '{print $2}')"; fi; if

Beetwen measure for 1 block device - 1 min, but beetwen measure sdd and HOME_LVM-Cloud - 40sec.

Template get correct data, but have some different result for different disk. It's not problem for monitoring in long time interval, but it's cause some questions in short time.

[emper0r]

Yeah.. you are right.. it's ok... I just need to choose wich watch..because between of them exist some seconds differents to change diskstats ... cool.. thanks for answer... 👍