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Knowledge Base

Upgrading to ESXi 6.5 U1 displays abnormal DAVG and KAVG data in ESXTOP (54458)

Last Updated: 6/25/2018Categories: InformationalTotal Views: 4069Language:
Chinese (Simplified)JapaneseEnglish

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Symptoms

Running esxtop displays abnormal DAVG/cmd and KAVG/cmd values.

Running the below command on the affected ESXi hosts display results as below:

vm-support -p -d 1800 -i 5 -w /vmfs/volumes/<VolumeNAme>/

Note: The below results are just examples. Values may vary in different scenarios.

​​
Sample of LUNs that showed abnormal values:

LUN ATS ATSF
naa.60a980003830386d4c3f4a43464b6733 436046 41
naa.60a980003830386d4c3f4a43464b6753 438974 385
naa.60a980003830386d4c3f4a43464b6755 436387 24
naa.60a980003830386d4c3f4a43464b6757 438984 169
naa.60a980003830386d4c3f4a43464b6759 435740 23
naa.60a980003830386d4c3f4a43464b6762 435732 25
naa.60a980003830386d4c3f4a43464b6764 437415 30
naa.60a980003830386d4c3f4a43464b6766 435739 29

Sample of LUNs that did not show abnormal values:

LUN ATS ATSF
naa.60a980003830386d4c3f4a43464b6835 785 0
naa.60a980003830386d4c3f4a43464b6837 629 0
naa.60a980003830386d4c3f4a43464b6839 629 0
naa.60a980003830386d4c3f4a43464b6841 630 0
naa.60a980003830386d4c3f4a43464b6843 629 0
naa.60a980003830386d4c3f4a43464b6845 629 0
naa.60a980003830386d4c3f4a43464b6847 644 0
naa.60a980003830386d4c3f4a43464b6849 633 0

Repeat offenders are typically busier LUNs in general.

Example of a few LUNs:

BAD

NETAPP Fibre Channel Disk (naa.60a980003830386d4c3f4a43464b6831)
/> cat /storage/scsifw/devices/naa.60a980003830386d4c3f4a43464b6831/stats
Statistics {
Successful Commands:25656883
Failed Commands:597
Blocks Read:1591656653
Failed Blocks Read:0
Blocks Written:1596779952
Failed Blocks Written:0
Read Operations:12494250
Failed Read Operations:0
Write Operations:12695671

total ATS cmds:436086
total ATS failures:30
total zero cmds:139
total zero failures:0
total blocks zeroed:284672

GOOD

NETAPP Fibre Channel Disk (naa.60a980003830386d4c3f4a43464b6833)
cat /storage/scsifw/devices/naa.60a980003830386d4c3f4a43464b6833/stats
Statistics {
Successful Commands:46839
Failed Commands:569
Blocks Read:828213
Failed Blocks Read:0
Blocks Written:1802
Failed Blocks Written:0
Read Operations:12857
Failed Read Operations:0
Write Operations:1802
...
total ATS cmds:639
total ATS failures:0
total zero cmds:0
total zero failures:0
total blocks zeroed:0

Pattern seen for effected LUNs:

CMDS/s: 0.19
DAVG/cmd: 18446744073709552.00
KAVG/cmd: -18446744073709552.00

CMDS/s: 0.38
DAVG/cmd: 9223372036854776.00
KAVG/cmd: -9223372036854776.00

Resolution

This issue is resolved in ESXi 6.5 U2, available at VMware Downloads.

Detectable by VMware SkylineTM

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