R450 with ME5012 sluggish performance with HyperV

Question

Just setup an R450 with an ME5012 (6x3.8TB SAS SSD) connected through 2 12Gb/s SAS connectors and running Server2022. 2x Xeon Silver 4310 CPUs with 256GB of 2666 DDR4

We migrated over one of our 2016 database servers, it's our SAP WEBI BO server, over to it, from an older HyperV system running standard non-SSD drives on a SAN with slower memory and a slower CPU, and it's slower on the new system than the old system despite more CPUs, more memory, fast drives, etc.

We've also built up a Server 2022 VM from scratch on it and that is also slower compared to an old VM on an older HyperV server. The 2022VM runs extracts, on the old 2016 server, the extracts would take 3 hours to run, the new server is well over 5 hours to run.

All the drivers are updated, the vhdxs are all fixed sizes, VMQ has been disabled. The servers used 2x1Gb teamed LAN ports to communicate with the outside world, these are teamed using the new SET team option. The allocated CPUs are 100% reserved for the VMs, as is the RAM. We've run Resource Monitor and we're also doing a Live Optics on the VM, and the host, and everything is suggesting that the VM and host aren getting taxed at all in anyway. The CPUs don't hit 100%, plenty of spare RAM, Hard Faults/sec is 0, Disk Queue Length doesn't get above 1 ever, LAN ports aren't getting saturated, latency on disk reads doesn't even hit 1ms.

Anyone ever seen this before?

Origin3k · Accepted Answer

Most Dell Servers are delivered with active powersaving features within BIOS and iDRAC. These often counteract when it comes to virtualization.

So set the system to MAXIMUM_POWER.

The following 3 values i have in my deployment script... you should take a look wheren it in the iDRAC.

:: Workload and Performance Settings
:: PerfPerWattOptimizedDapc - Performance Per Watt (DAPC);
:: PerfPerWattOptimizedOs - Performance Per Watt (OS);
:: PerfOptimized - Performance;
set SYSPROFILE=PerfOptimized


:: Workload and Performance Settings
:: NotConfigured - Not Configured;
:: HpcProfile - HPC Profile;LowLatencyOptimizedProfile - Low Latency Optimized Profile;
:: VtOptimizedProfile - Virtualization Optimized Performance Profile;
:: VtPerWattOptimizedProfile - Virtualization Optimized Performance Per Watt Profile;
:: DbOptimizedProfile - DataBase Optimized Performance Profile;
:: DbPerWattOptimizedProfile - Database Optimized Performance Per Watt Profile;
:: SdsOptimizedProfile - SDS Optimized Performance Profile;
:: SdsPerWattOptimizedProfile - SDS Optimized Performance Per Watt Profile;
:: TelcoOptimizedProfile - Telco Optimized Profile;
set WORKLOADPROFILE=NotConfigured


:: iDRAC Performance Profile
:: 0-Default Thermal Profile Settings;
:: 1-Maximum Performance;
:: 2-Minimum Power;
:: 3-Sound Cap;
:: Default - 0
set THERMALPROFILE=1

Also take notice that the Xeon Silver 4310 is a entry level one and should be avoided when it comes to virtualization and everything which have SAP in its name.

A system reboot is needed to take changes effect.

Regards,
Joerg

simon.peart · Accepted Answer

Thank you, i did make some changes in the BIOS and the performance is absolutely night and day to what it was. Biggest difference was disabling the C States option in the BIOS. Below are the Passmark results when running it on the VMs.

Also, we have an extract that runs and processes information. Old VM did it in 34minutes, new VM pre-BIOS changes did it in 61 minutes, new VM post-BIOS changes did it in 31 minutes.

Passmark	CPU	CPU - 1 Thread	2D	Memory	Disk	Total
VM	6473.2		23.8	1620.1	16269.1	357.9
VM (Post BIOS Changes)	6791	1886	96.2	2013.2	24633.1	1265.8
VM on old Host	4331		72	1652	2502.3	906.7

DELL-Charles R · Answer

Hello simon.peart,

Does the iDRAC System Event Log or the LifeCycle log show any issues?

Are there any non-Dell parts installed?

Can your run a hardware diagnostics and check results for any faults?

Boot to LifeCycle controller then select: Hardware Diagnostics

Origin3k · Answer

Youre welcome Regards,Joerg

partha06 · Answer

I am facing same issue with HyperV 2022, I have installed Vmware on another identical servers works super smooth, Not sure whats lags with Dell and HyperV

DELL-Young E · Answer

Hello have you tried what Dell -Charles R has suggested previously?

PowerEdge Hardware General

R450 with ME5012 sluggish performance with HyperV

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