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  #11  
Old 01-24-2011, 12:18 AM
charlez charlez is offline
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With the advances in CPU and hardware-level virtualization, performance has improved significantly.

Also installing software like memcache can reduce memory hogging to great extend.

Databases are the main reason for memory/cpu hogging.
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  #12  
Old 01-29-2011, 05:13 AM
FastPCNet FastPCNet is offline
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The real benefits of virtualization comes once you get a SAN. Java is a hog but with VM's you can get a lot of control.
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  #13  
Old 01-31-2011, 06:17 PM
emad emad is offline
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Java is a pretty nice system software. However it became unpopular because of the huge memeory requirements for graphics applications.
With Java in the linux kernel the hugemem kernel flushes
the TLB on every system call. Pretty much anything that you
run on the hugemem kernel will be slow.
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  #14  
Old 03-28-2011, 09:31 PM
shaune shaune is offline
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for Java it's better to use Virtuozzo for virtualization
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  #15  
Old 03-31-2011, 04:56 AM
eilert eilert is offline
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Server consolidation is one major benefit of virtualization. Those servers, which has less traffic or comparatively less used can be combined to run from a single server in this mode. Perhaps the resources being used for multiple servers can be single handedly run from a virtual server environment. Java applications best run on VPS servers, the processes can be allotted memory even dedicatedly.
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  #16  
Old 04-05-2011, 04:22 PM
jackson jackson is offline
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Virtualization is a combination of software and hardware engineering that creates Virtual Machines (VMs) - an abstraction of the computer hardware that allows a single machine to act as if it where many machines.
So by using virtualised machines the Resource sharing is enabled and it helps to
for better performance.
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  #17  
Old 06-04-2011, 11:49 AM
emad emad is offline
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There are many types of virtualization. like openVZ and Xen.

The main fact is it happens on the server. VIrtualization shares the h/w of the server as per the command/requirements.
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  #18  
Old 01-27-2012, 09:28 AM
HostAddonLtd HostAddonLtd is offline
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Too many unknowns to answer properly:
Which versons of OS and Server apps?
How many users?

Exchange and SQL will grab all available memory so may be better on separate VMs.
Filtering should be in a DMZ role and proxy server (at least TMG) should be border machines so not combined with other roles.
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  #19  
Old 03-07-2012, 07:38 AM
prctshplc prctshplc is offline
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Virtualization vs physical server management is not particularly more complex and the benefits are well worth the effort. The commentator notes that itís easier to manage a virtual machine. When you have a physical machine running at an ISP server room there are many things that need to be monitored
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  #20  
Old 03-20-2012, 03:12 AM
codemonkey codemonkey is offline
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We switched to a virtual server about a year ago, and haven't looked back. It's been cheaper for us overall, and so far, there have been no disadvantages.

If your application is having trouble, I'd look into what the other posters have recommended. It might be a problem with configuration, but I doubt it's because of the virtual server, as most applications can't tell the difference.
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