Dear team
one of my VM performing very slow then i have found the datastore where it's vmdk located the GAVG/cmd latency is 600 + , (as suggested by duncan epping the threshold limit is 27), i just want to know if GAVG threshold metric exceed to 600+ then what will be the impact..... (DAVG 500 and KAVG 30+)
need to export only GAVG/cmd metric with the help of esxtop command in batch mode , how to do that ?????.
Regards
Mr Vmware
It might, but you should check with your array vendor if they support RR.
Also, 600ms response times indicate far more than just path loading problems - you are probably driving to much IO to the disks - you need to check on that.
Note: Discussion successfully moved from Enterprise Strategy & Planning to Performance & VMmark
The impact will be that the guest operating system will not respond because your disks are not providing enough throughput.
Fiber / iSCSI?
Maish
u mean to say this problem is related to device/LUN, so how we can resolve the same.
High GAVG almost always comes from a high DAVG, which means that your storage is responding VERY slowly. You need ot contact your storage administrtor or tech support to find out why its responding so slowly - usually it means you are overloading it.
currently the path selection policy is selected as MRU, if we change to Round Robin will it help to balance the load????
regards
Mr Vmware
It might, but you should check with your array vendor if they support RR.
Also, 600ms response times indicate far more than just path loading problems - you are probably driving to much IO to the disks - you need to check on that.
Thanks friends,
just want to know how to export only GAVG metrics data???
regards
Mr Vmware
Here you go.
Maish
VMTN Moderator | vExpert
Author of VMware vSphere Design