All Questions
Tagged with performance vmware-esxi
76
questions
0
votes
2
answers
65
views
Server's Disk Queue Length is high, but Disk Bytes/sec is lower than it's capable of
I have an environment running SQL Server on a Windows VMWare platform using a SAN with SSDs set up in RAID 6, and using Veeam for server backups and LiteSpeed for SQL Server backups.
I've had a ...
- 101
0
votes
1
answer
87
views
Disk read metrics not showing for postgres activity
I've long noticed that ESXI wasn't showing disk READ activity for my Ubuntu Postgres database server. I figured maybe it was just a weird bug with ESXI, as it would show disk WRITE activity.
I decided ...
- 99
1
vote
1
answer
608
views
Virtual machine disk I/O latency spikes
Since past few days I have strange I/O spikes in one virtual machine.
Its
2.6.32-504.el6.x86_64 #1 SMP Tue Sep 16 01:56:35 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux
Red Hat Enterprise Linux Server ...
2
votes
1
answer
1k
views
High CPU usage by apache/httpd for light load, 'perf record' points at vmware/hardware
Running Apache 2.4 on RHEL7 kernel 3.10.0-1062, 4 CPU VMWare instance, doing very basic reverse proxying to WebLogic backend using WebLogic proxy plugin. Server is only pushing around 1 MByte/sec with ...
- 21
2
votes
2
answers
279
views
ESXi Fault Tolerance Network Issue - FT traffic flooded?
I've setup a 2-nodes vSphere cluster. Each node is equipped with 4x1GE NICs. I have set a single vSwitch in each node, using all 4 vmnics as adapters and the following ports:
Management: vmKernel ...
- 158
23
votes
1
answer
2k
views
How to describe VMware performance requirements for our application to a VMware admin?
Often, an installation of our on-site, debian-stable based application runs in a virtual machine - typically in VMware ESXi. In the general case we do not have visibility into or influence over their ...
- 852
12
votes
1
answer
9k
views
What actually happens when I mark a disk as SSD in ESXi?
In VMWare ESXi / vSphere, you can mark a disk or LUN as "Flash", indicating that the disk is an SSD (or the LUN is SSD/flash storage backed)
When you do, you get the following warning:
Marking HDD ...
- 9,198
2
votes
1
answer
4k
views
Windows 10 esxi 6.0 performance
I'm running an ESXi 6.0.0-2494585-standard server. On this server are ~20 virtual machines running (ubuntu/suse linux & windows 7 & 10). The performance of all VMs is fine, except the windows ...
- 21
4
votes
2
answers
1k
views
Diagnosing slow data processing on a VM
We're trying to diagnose a VM apparently running slowly, from inside the VM.
The situation:
We have an IIS-hosted application on Windows Server 2008R2 running on a 6-core, 12GB virtual machine.
We ...
- 161
4
votes
0
answers
1k
views
Disk performance very slow on esxi 6
I have dedicated server with esxi6.
I uploaded many iso from vsphere window client and i have 5 vms on it with 2 X1 TB HD SATA.
The upload was quick but just now it is taking forever to upload.
...
- 41
2
votes
2
answers
4k
views
Speeding up vCenter Template Cloning
My VM templates are <4GB in size, and when I finish cloning them into a Virtual Machine, they are still <4GB in size:
The template:
The VM created from that template:
My ESXi machine is ...
- 315
12
votes
3
answers
370
views
Why don't servers always run at max?
This is a question that has been bothering me for a while, and I can't seem to find anything online that talks about it. I have a server running VMware Hypervisor ESXi. When I boot up virtual ...
- 685
3
votes
2
answers
3k
views
Stand alone single thread optimized server vs vm running on VMWare
I apologize for the length of my post.
We recently converted our business system to a product that is licensed by the number of Cores.
We purchased the 2 core license and are currently running it on ...
- 31
1
vote
0
answers
151
views
Awful SQL Server Performance during ESX snapshot
I have two standalone SQL boxes in a 2 host ESX cluster. At the moment they are running on the same host.
We take nightly backups using Veeam. One of these servers spikes to 90-100% CPU for the ...
- 1,280
0
votes
0
answers
3k
views
ESXi Guest OS network transfer rate slow?
TLDR = I have proven data transfer from virtual machines to physical machines is a fraction of what it is from physical machine to physical machine. ESXi boasts "gigabit adapters" so, it seems it ...
- 348
0
votes
2
answers
2k
views
Poor Write I/O Performance on HP ML110 G9 Server With ESXi 6.0U2
hi everyone i need a little bit of help since i cant find a solution,
i have a HP ML110 G9 Server with:
8gb Ram
2 HDD of 2tb Each one and one SSD of 250 GB
i have installed ESXi 6.0u2 HP Customized....
- 17
0
votes
0
answers
132
views
Disk performance drops in VMWare ESXi 4.1 / 5 Linux Guest
I'm benchmarking disk write performance using this command:
dd if=/dev/zero of=/mnt/test.dmp bs=1M count=256 conv=fdatasync
After a random time and random number of attempts, the file system ...
- 351
3
votes
0
answers
243
views
Finding or estimating sequential vs random distribution of existing system (VMware / SAN)
IOMeter testing says the IOPs of the storage subsystem can range from hundreds of IOPs for 100% random loads to tens of thousands IOPs for 100% sequential loads.
Is there any way I can measure or ...
- 5,726
0
votes
0
answers
726
views
Synology DS1813+ RAID 5 with iSCSI IO wait perfomance issue
I'm have RAID 5 on Synology DS1813+ (DSM Version: DSM 5.0-4493 Update 4) with 8 ST4000DM000-1F2168 disk, usind as NAS and iSCSI/NFS targer for ESXi.
In low read/write rate from disk have more io wait,...
- 111
1
vote
0
answers
688
views
VMWare ESXi and iSCSI via FreeNAS
I've recently been setting up a sandbox ESXi environment with a VM running FreeNAS providing a volume which is connected as a datastore on the host via iSCSI.
I've created a VM on this datastore and ...
- 11
0
votes
0
answers
1k
views
vSphere | VMs are balooning and swapping | sched.mem.max paratmetar does not exist
I have two VMs in ESXi5.5 environment that are swapping memory. After a long research I found out the below two articles where it is explained that one must compare the values of memsize and sched.mem....
- 1,154
2
votes
2
answers
491
views
Virtualized Server 2003 vs Server 2008 R2 file transfer rate differences?
Basically I am trying to find out where the difference in the rate of a network file copy might come from.
I have a virtual Server 2008 R2 SP1 and a virtual Server 2003 R2 SP2, using the same store, ...
- 253
19
votes
3
answers
5k
views
Is running permanently in a VMWare snapshot bad for performance?
I understand that the VMWare KB frowns upon long running snapshots mainly due to two things (In my opinion)
Taking tons of snapshots can fill up the data store. Snapshots are simply delta files. ...
0
votes
0
answers
2k
views
What happens on an SQL Server when a snapshot is taken by VMWare?
Recently I saw in our SQL Server logs that a snapshot could not be taken at the specific time and he retried it later on. During that timespan we had a huge performance problem.
Besides the SQL Server ...
- 1,451
0
votes
1
answer
3k
views
How to solve performance problems with VMware ESXi 5.5 on old Dell PowerEdge 2900 hardware [closed]
I have a couple of old Dell PowerEdge 2900 servers that have come free and I would like to use them to host a mail server cluster.
They are a bit old, but have been running workhorses for a while, ...
2
votes
1
answer
120
views
VMware VMFS5 Local Storage LUN Sizing
We have a VM ESXi 5.x host using local storage (DAS).
It has 2 relatively large Logical Drives in RAID10 (10 HDD x1TB each). So, 2 LUNs of 5TB each.
We are considering creating just two datastores,...
- 393
62
votes
10
answers
15k
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. ...
- 5,232
1
vote
0
answers
3k
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 ...
- 161
9
votes
3
answers
10k
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 ...
- 689
1
vote
1
answer
443
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, ...
- 894
0
votes
0
answers
248
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 ...
user160910
3
votes
1
answer
1k
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 ...
- 699
4
votes
1
answer
62k
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 don'...
- 2,625
7
votes
2
answers
23k
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 ...
user160910
3
votes
1
answer
13k
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 12X1....
- 31
1
vote
3
answers
2k
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 ...
- 5,540
44
votes
1
answer
61k
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 ...
- 1,686
0
votes
3
answers
5k
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 ...
- 123
1
vote
2
answers
19k
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, ...
- 3,303
5
votes
1
answer
7k
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 ...
- 91
4
votes
2
answers
3k
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.
...
- 319
3
votes
1
answer
1k
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 ...
- 173
1
vote
2
answers
12k
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 ...
- 121
4
votes
3
answers
6k
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 ...
- 153
29
votes
4
answers
49k
views
Why VM snapshots are affecting performance?
I read in one of the VMware KB articles that snapshots will directly affect VM performance.
But my team keeps asking me how snapshots can affect performance.
I would like to give them solid reason ...
- 1,311
-1
votes
4
answers
648
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 ...
- 1,311
0
votes
3
answers
2k
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 ...
- 325
1
vote
1
answer
1k
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 ...
- 259
0
votes
1
answer
312
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 ...
- 103
0
votes
2
answers
2k
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 ...
- 101