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bernardP
Contributor
Contributor

XenApp 6.5 on VSphere 5->Vm performance issue

Hi all,

I am having some perfs issues with Vm (Win 2008 R2, 4 GB Ram, 1 vcpu and XenApp 6.5) and I am wondering if that could be a datastore issue because we are using datastore clusters.

Has someone set up a XenApp 6.5  virtualized on VSphere 5 ?

Thank you

Regards

Bernard

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JCMorrissey
Expert
Expert

Hi Bernard,

Certainly have, and works v.well for me. What sort of issues are experiencing? intermittment slowdowns? slow logons or is it slow all the time?

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Omega42
Contributor
Contributor

Yes running great.

But we are now on 10GB Ram and 4 Vcpus.

We could most certainly go with 2 Vcpus, but Ram usage is heavy compared to our old 2003/PS4.5 Farm.

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bernardP
Contributor
Contributor

Hi JC,

We were having slow logons on published apps and slow installation process (xenapp iso is located on the datastore where resides the vm).

But, it seems that the performance issue was due to the datastore storage cluster-> yesterday  I removed the datastore cluster and the hosts are now seeing standard Luns. The performances are better now according to the testers. 

Any ideas of tuning the datastore cluster ?

Many thanks

Bernard

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bernardP
Contributor
Contributor

Hi,

Do you use datastore clusters ? How are they set up ? Our issues are probably due to datastore clusters, see the response published for JCMorrisey.

For your Vms with 4 vcpus and 10 Gb Ram, did you use the ESX Top counters to fix these values ?

Thank you

Regards

Bernard

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JCMorrissey
Expert
Expert

Hi Bernard,

Yes one of the key performance recommendations citrix always make is for your citrix VM's to run in a 1:1 ratio vis-a-vis vCPU:logical processor ratio. V.insistent that you dont overcommit on your CPU count.
Regards your slow logons issues do you use:

i) roaming profiles?

ii) or some profile management software? eg Citrix profile management ? if you are a platinum customer you'd be entitled to it - certainly worth looking into it.

Could utilize profile streaming and exclusions to minimize your profile sizes and thus lower your logon times(alternatively could use folder redirection but have had application issues in the past with it.

You mention your issues may be related to the datastore clusters? our other services sharing the same cluster experiencing intermittment slowdowns?

be worth checking your average disk queue lengths arent > 2 on your servers - a sure sign of I/O troubles

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bernardP
Contributor
Contributor

Hi,

Apparently we are about to solve one of our issues. This issue was slow installation citrix Ps 4.5 process, the server seemed to be hanged on. It took many hours to complete and all our esxtop counters didn't help us.

We applied the solution in article and the installation goes faster now (a few minutes vs many hours).

CTX113639 - The Citrix Presentation Server 4.5 Installation Appears to be in an Unresponsive State -...

The other issue : slow logon process is almost solved :

I fixed the network speed on the network interface in the Virtual Connect Manager and it seems to go faster now, formerly we were in Auto Mode.

I am also checking if the network adapter speed in Virtual machines must be fixed or Auto ? Normally the system will pass the traffic to the host adapters but how is it negociated ?

Thanks

Regards