All Questions
Tagged with performance virtualization
9
questions
16
votes
2
answers
2k
views
Can a virtualized machine have the CPU and RAM resources of multiple underlying physical machines?
We are studying implementing some virtualized servers here, but we don't know what will be better suitable for us. Some folks are saying better have two huge servers, and others are saying have like a ...
- 295
89
votes
4
answers
18k
views
Why is TCP accept() performance so bad under Xen?
The rate at which my server can accept() new incoming TCP connections is really bad under Xen. The same test on bare metal hardware shows 3-5x speed ups.
How come this is so bad under Xen?
Can you ...
- 1,061
26
votes
3
answers
29k
views
How much overhead does x86/x64 virtualization have?
How much overhead does x86/x64 virtualization (I'll probably be using VirtualBox, possbly VMWare, definitely not paravirtualization) have for each of the following operations a Win64 host and Linux64 ...
- 681
11
votes
3
answers
19k
views
Xen vs. VirtualBox under heavy load?
Which performs better under heavy CPU and memory usage on the virtual servers, Xen or VirtualBox?
- 7,483
11
votes
6
answers
1k
views
Accurately trending random I/O performance for capacity planning
Where I work we have a numerous "big iron" servers which are used used for hosting many virtual machines using a Xen Hypervisor. These are typically configured with 32GB RAM, Dual Quad core processes ...
- 1,146
4
votes
3
answers
3k
views
How to find virtualization performance bottlenecks?
We have recently started moving our C++ build server(s) from real machines into VMs. (MS Hyper-V)
We have some performance issues that I've currently no idea how to address. We have:
Test-Box - this ...
- 599
3
votes
7
answers
10k
views
SQL Server Slow but CPU Normal
We're having some trouble with SQL Server hosted on a virtual server. We occasionally have short periods where even performing a simple select takes minutes. During this period the CPU and memory ...
- 183
3
votes
3
answers
6k
views
How does the LeftHand SAN perform in a Production environment?
I previously asked this ServerFault question: Does anyone have experience with lefthands VSA SAN
The general consensus looks like it does not perform well enough for a production SQL server even at ...
- 740
1
vote
1
answer
1k
views
How do I measure and compare disk performance of my Hyper-V Windows VM?
I'm not sure whether this sounds stupid or lazy, but I'm really not sure.
I have a problem with the performance of a VM setup (2008R2-64bit Hyper-V running a 2003R2-32bit Windows server) and I'd like ...
- 599