46
votes
10answers
14k views

How to [politely?] tell software vendor they don't know what they're talking about

Not a technical question, but a valid one nonetheless. Scenario: HP ProLiant DL380 Gen 8 with 2 x 8-core Xeon E5-2667 CPUs and 256GB RAM running ESXi 5.5. Eight VMs for a given vendor's system. ...
0
votes
0answers
465 views

Server 2012 slow performance on ESXi 5.5

I'm having performance issues with a virtual Server 2012 that is installed on an ESXi 5.5 (HP-ESXi-5.5.0-iso-5.71.3). The hardware server is an HP ProLiant DL380p Gen8. The server 2012 is acting as ...
5
votes
2answers
1k views

Why would Linux VM in vSphere ESXi 5.5 show dramatically increased disk i/o latency?

I'm stumped and I hope someone else will recognize the symptoms of this problem. Hardware: new Dell T110 II, dual-core Pentium G850 2.9 GHz, onboard SATA controller, one new 500 GB 7200 RPM cabled ...
1
vote
1answer
173 views

upgrade/reinstall vmware vsan from beta

Being a VSAN beta tester I decided to upgrade to GA version as VMWare suggests for production sites. They say, it is not possible/supported to upgrade from beta to GA version, and I did not upgrade, ...
0
votes
0answers
81 views

Boot disk with VMFS read/write driver

I want to rule out the ESXi kernel being the cause for my terrible 15MB/s write speed on the local VMFS datastore. I am using a Dell PERC H710 RAID controller, and would like to boot from a boot disk ...
2
votes
1answer
252 views

VMware Performance Monitor: How does aggregation work for VM Processor\% Processor Time

I'm monitoring a Windows Server 2008 R2 SP1 VM running on vSphere 5.1 for CPU bottlenecks. I'm using Performance Monitor and configured a few counters. Two of which are Processor\% Processor Time and ...
3
votes
1answer
7k views

what is acceptable datastore latency on VMware ESXi host?

Looking at our performance figures on our existing VMware ESXi 4.1 host at the Datastore/Real-time performance data Write Latency Avg 14 ms Max 41 ms Read Latency Avg 4.5 ms Max 12 ms People ...
4
votes
1answer
4k views

Poor Disk Performance on VMs; Host using PERC H310 RAID 5

I have a Dell R620 running 5 500GB 7.2K RPM SATA 3Gbps 2.5in Hot-plug Hard Drives in a PERC H310 controller (which I am beginning to regret buying). I am getting awful read/write speeds on Linux ...
3
votes
1answer
3k views

Performance issue of Server 2012 VM on ESXi 5.1 U1

I'm having issues with a VM, as stated in the topic, that runs on ESXi U1, build 1065491. The machine is sluggish and i can't figure out why.. Here's the details. It runs on a Dell T420, has ...
1
vote
3answers
526 views

IBM SR-BR10i RAID Controller too slow with VMware ESXi

I'm transferring a virtual machine from one ESXi host to another using SSH on both ESXi Servers. But it's painful slow, it's a massive 750GB .vmdk disk image, the VM is stopped (with downtime) and ...
7
votes
1answer
4k views

Is there still a use for irqbalance on modern hardware?

This question has been asked before, but I believe that the world has changed enough for it to be asked again. Does irqbalance have any use on today’s systems where we have NUMA-capable CPUs with ...
0
votes
3answers
745 views

Increasing vCPUs for Server 2003?

I have a VM running Server 2003 and SQL Server 2008 on VMware ESXi. Can I safely assume this configuration can cope with a change to the number of vCPUs? Are there better solutions to address the ...
1
vote
2answers
9k views

VMware ESXi 5 Slow performance, hundreds of I/O latency errors. [closed]

We have a standalone ESXi5 Server with the follow hardware specs: - Supermicro X8DTL - Intel Xeon(R) CPU E5506 2.13GHz - 25G Ram - 1TB HD (mirrored RAID, local SATA) We have around 17 VM's running, ...
3
votes
1answer
2k views

Whats the cause of VMWare esxi Ubuntu very slow disk performance (3MB/s)?

Currently I am running Zentyal Server(Ubuntu) as Guest on a esxi 5 host on a Adaptec raid controller RAID 10 with Enterprise WD hard drives, 8 Core CPU and 8 Gb of ram (I know a bit overkill) to ...
1
vote
2answers
494 views

How does CPU consumption look like from a VM on a heavily use VM Host?

I know I could test this, but I don't have the time right now to setup pristine test conditions to learn something that should be in documented form - and that I cannot find in an authoritative form. ...
3
votes
1answer
722 views

Windows 8 x64 with VMWare Workstation or inside ESXi [closed]

I need to run several virtual machines on a core i7-920 box with 12GB or RAM and a 256GB SSD to host the VMs. It also has a Highpoint RocketRaid 2720SGL RAID controller with a 12TB RAID 5 array. I ...
1
vote
2answers
2k views

Is there anything I can do to improve the performance of uploading ISOs to ESXi 5?

I'm trying to upload a few Debian ISOs to my ESXi 5 datastore but it's really slow. Far slower than downloading them from the web was in the first place. I've tried both via the GUI uploader and ...
4
votes
3answers
2k views

Jumbo Frames, ISCSI and ESXi

I have enabled Jumbo Frames (9000) in ESXi for all my vmNICs, vmKernels, vSwitches, iSCSI Bindings etc - basically anywhere in ESXi where it has an MTU settings I have put 9000 in it. The ports on the ...
11
votes
4answers
5k views

Why VM snapshots are affecting performance?

I read in one of the VMware KB article says that snapshots will directly proportional to VM performance. But my team keep asking me how snapshots can affect performance. I would like to give them ...
-1
votes
4answers
272 views

Does shutdown idle VMs improve the performance?

Often our team members are coming to me with a compliant that their VMs are slow. Our team members suggested to shutdown some of the VMs temporarily and try to access the VM. But most cases that ...
0
votes
2answers
630 views

How to analyse performance ESXi NFS Copy between datastores

I'm having trouble with ESXi backup/restore performance. My setup: VMWare ESXi 5.0.0 on a HP ProLiant DL 360 G6, runnnig RAID 5 on a P410 SmartArray as SAS QNAP Nas (QNAP TS-809U-RP NAS 8 bays ...
1
vote
1answer
487 views

CPU under heavy load with simple file copy on windows VPS on ESXi host

I recently bought a VPS and am in contact with their support about this issue, but I would also like to get an expert opinion from here. It's a fully updated Windows Server 2008 R2 VPS hosted on ...
0
votes
1answer
227 views

One VM slowing all others on ESXi

I've been using ESXi server for a while now. It's a pretty strong machine (i7-2600 + 16GB RAM), and I use it to run concurrently 5 VMs (Mostly Windows Server 2008 R2). Most of the times, the VMs run ...
0
votes
2answers
1k views

VMWARE ESXi5.0 update1 scp from vmkernel is slow

My ESXi 5.0 update1 is a single server. All my network environment are Giga-LAN equipments and NICs. I want to backup all the files of every guest OS and ftp them to a NAS server. My ESXi server's ...
4
votes
4answers
20k views

Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

I have a server with ESXi 5 and iSCSI attached network storage. The storage server has 4x1Tb SATA II disks in Raid-Z on freenas 8.0.4. Those two machines are connected to each other with Gigabit ...
1
vote
3answers
636 views

VMWare performance for a build server - awful or wrong tests?

We are looking into virtualizing our C++ Build server(s). The main reason being that our current toolchain that we use in addition to the build itself in Visual Studio only runs properly on Windows ...
3
votes
2answers
269 views

Network issue with ESXi 4.1 during large file transfers (VM migration)

VM migration from one ESXi host to another is causing a strange graph signature that is very reproducible: I have no idea why this is happening. The ESXi server is a Dell PowerEdge 2850 using an ...
-2
votes
4answers
229 views

what are all the common factors affecting VM performance? [closed]

Recently we faced a performance problem in our ESXi 4.1 hosted in Dell R710 server. I verified RAM and it was 48 GB. I checked the CPU it was quadcore. Finally i came to know that the server had only ...
2
votes
1answer
6k views

ESXi 5 network performance is slow

We just did a fresh install of ESXi 5 on a host that was running ESX 4 before. Nothing has changed hardware wise. After the upgrade network performance is much slower. Even copying a big file from one ...
2
votes
6answers
1k views

Windows XP on ESXi 4 box has very high CPU when idle

On my ESX box, I have a Windows XP low resource machine that I use to host a few scripts and management tools for my (virtual) servers. Whenever my box is idle for 20-30 minutes, without fail, the ...
2
votes
1answer
364 views

Performance Impact of Virtualization

I know that modern virtualization has minimal CPU impact. What about I/O? What about GUI work? I'm asking specifically for VMware Workstation (Windows Host) and VMWare ESXi; Linux guest. Edit: I'd ...
0
votes
4answers
3k views

Slow performance on VMWare Linux server after Tomcat install

We have a VMWare ESXi 4.1 server hosting a number of Linux and Windows guests. Recently a new Linux guest was added to this server and seemed to be performing well. Tomcat and some other applications ...
2
votes
2answers
3k views

Windows 2008 R2 on ESXi 4.1 cpu utilization kernel high

I have a Win2k8 guest running on ESXi 4.1. The host has 12 cores and the problem happens even if the guest is the only VM on the host. We have 4 cores dedicated to the guest. We noticed that network ...
1
vote
4answers
2k views

Possible reasons for high CPU load of taskmgr.exe process on VM?

On a VMware virtual machine which has severe performance problems I can see a constant average of 20+ percent CPU load for the TASKMGR.EXE (task manager) process. The apps running on this server have ...
1
vote
2answers
1k views

ESXi vs Hyper-V performance with multiple VM's

We are building a server to run our web site, where we will have following apps running 1. ASP.NET Web Application 2. ASP.NET WCF middletier 3. SQL Server 2008 4. Lucene + Solr + Tomcat 5. MongoDB 6. ...
0
votes
1answer
124 views

Nehalem vs Magny-Cours for VMWare/TS server

another question regarding this server I'm about to buy. I have to buy a server to run Terminal Server to host an ERP application, plus I would like to consolidate a few other servers onto it. This ...
1
vote
2answers
603 views

ESXi performance considerations with VM that requires many CPUs

I will be looking to buy a new server soon, and would like to consolidate servers into one VM server. I will have equivalent infrastructure offset, so this isn't a case of having all my eggs in one ...
1
vote
2answers
375 views

Does VMDirectPath help disk IOPS performance?

I read the VMDirectPath materials, and they say that it helps the performance on the 10Gbs card case. Sure, if multiple VMs directly access the physical 10GbE card, the VMM bottleneck is avoided with ...
2
votes
1answer
110 views

Is it Good to place Windows Server paging files on seperate fast storage?

How much of an impact does the performance of the storage system hosting the paging files of windows machines (I guess both physical or virtual instances like VMWare / KVM / Xen / Whatever)?
1
vote
2answers
2k views

VMWare Esxi Looking for Bottlenecks

I have a VMWare ESxi box, 22GB ram, Dual Quad Core Xeon, 2 Sas drives + Write caching raid controller etc. Anyways, have about 30 small XP VM's running on it and starting to get some very slow boot ...
1
vote
1answer
544 views

SQL Server - VMWare Install - Transactional Replication causing 100% CPU

I am having severe trouble with a SQL Server - in particular, with transactional replication. We used to have a Windows 2003 physical machine, with SQL 2000. We call this “WebDB” The server was ...
0
votes
1answer
369 views

SQL Server - VMWare install - Utilize more RAM

We have a SQL server machine - It’s a VMWare image (running on ESXi hardware etc..) It has windows 2008 x64 standard The SQL install is SQL 2008 standard The virtual machine has 12gb of RAM, and 4 ...
0
votes
3answers
688 views

Guest ESXi 4 Memory Usage in vSphere Client

one of our VM's is running relatively slowly. it is the only VM running on the ESXi server. In the performance tab the active memory is very low (<1gb), however what is strange is the 'consumed' ...
3
votes
2answers
1k views

Poor performance from SAS disks on HS22 blade in CentOS/RHEL on ESXi 4.0

I have an HS22 blade configured with two 600GB 10K 6Gbps SAS drives configured in RAID1 using the onboard LSI Logic controller. Running on it is VMWare ESXi 4.0u2, and on top of that are a couple VMs. ...
1
vote
4answers
2k views

Slow VM on esxi 4.1

We have a FreeBSD 64bit running on a esxi 4.1, the hardware platform is a DELL R710 with 2 x 56xx (intel 6core cpu) and 48 GB ram. The FreeBSD vm is very slow, when we compiles/builds something on it, ...
5
votes
3answers
1k views

Certain SQL queries performing very poorly in ESXI hosted environment

We recently set up a new machine with 8 dual-core CPUs, 20 GB RAM, and 3 1-TB drives set up in a RAID of some sort resulting in 2 1-TB drives we actually get to use (I'm not the hardware guy here). ...
0
votes
3answers
1k views

VMware ESXi 2U Server Vs. Traditional Bare Metal 1U Server

I have a Dell PE 2970 quoted and ready to order with the following specs: 2X 6-core AMD 2.2ghz 6mb HT-3 6X 73gb 15K SCSI 6Gbps 2.5in (RAID 10) 16GB (4X4gb) 800mhz RAM 2X Intel Pro 1000PT Single Port ...
0
votes
2answers
142 views

Virtual Machine NATing

I'm moving a box that's running ESXi into a server colocation room at a local ISP. This box has a few virtual machines on it, and the local ISP just provides 1 IP address (by default). Is there ...
5
votes
1answer
917 views

Samba on Debian Lenny much slower than Windows 2008

I have a VMWare ESXi 4 server running two virtual machines. The host server is a quad core AMD Phenom II with 8 GB RAM and a RAID-5 SATA-II array. The Debian VM is Debian Lenny with latest updates - ...