Some disk metrics missing in performance stats since update to VC5.0 U2

[mhartleib]

Hi,

since our update from VC 5.0 to VC5.0 U2, the following metrics don't seem to rollup for past day/week/month/year anymore:

Virtual Disk - Average read requests per second

Virtual Disk - Average write requests per second

Virtual Disk - Read Latency

Virtual Disk - Write Latency

Realtime stats for these metrics are fine, as well as older historical data before the update.

vCenter is installed on a Windows Server 2008 R2 VM, Database: Oracle.

I also saw this issue on a VC 5.1 upgraded from VC 5.0 with local MS SQL DB.

Have these metrics been removed from historical performance data at all?

Anyone with similar issues?

Regards,

Michael

[a_nut_in]

Hey Michael,

Are the virtual machines running on NFS?

Regards

a

[mhartleib]

Hi a,

no, they are all on vmfs datastores (fibrechannel).

Regards,

Michael

[a_nut_in · Accepted solution]

What is the collection level set to? If 1, try a 2 or 3 and check?

http://pubs.vmware.com/vsphere-51/topic/com.vmware.vsphere.monitoring.doc/GUID-25800DE4-68E5-41CC-82...

[mhartleib]

thank you a,

changing the collection level to 3 did the trick.

We've been using level 2 all the time and never had issues with that metrics...

I'm a little confused by the specification "collection level 1" for these metrics (see screenshot).
According to that, shouldn't these metrics be included in rollup, when collection level is set to 1 or even 2?

Regards,
Michael

[a_nut_in]

Ideally, I would have thought so. But then, the best way to get a confirmation would be to open a ticket with VMware and have that clarified. If it's product behaviour, probably you could get a clarification, but if something is broken in the collection algorithm, reporting the issue is the best way to fix it.

[mhartleib]

After contacting VMware support, it turned out that in VC 5.0 U1 the SDRS/SIOC stats (which include the read-/write-IO-stats I mentioned above) have been moved to rollup level 3.

See http://kb.vmware.com/kb/2031594 and http://kb.vmware.com/kb/2009532