Re: [zones-discuss] Physical Memory on zones

2007-01-09 Thread Jeff Savit

Durga Deep wrote:

We have a machine that has 2GB of physical memory ( source prtconf ).

When I create zones (say 4), how does the physical memory of the machine get 
impacted ?. Is  there a performance hit ?. Please share your responses.

_DD
 
 
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Durga,

Zones don't require dedicated RAM. Processes in zones compete for RAM 
much as do in a non-zoned environment. There's a small memory footprint, 
but it's not a major item. See 
http://opensolaris.org/os/community/zones/faq/ which has discussion of 
this and other topics you may find helpful. In particular, from Section 2:


"Q: How "big" is a zone?
A: If configured with default parameters, a zone requires about 85MB of 
free disk space per zone when the global zone has been installed with 
the "All" metacluster of Solaris packages. Additional packages installed 
in the global zone will require additional space in the non-global 
zones. SVM soft partitions can be used to divide disk slices and enforce 
per-zone disk space constraints. When performing capacity planning, 40MB 
of additional RAM per zone is suggested. Applications do not use any 
"extra" RAM because they are running in a zone."


regards, Jeff
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[zones-discuss] Physical Memory on zones

2007-01-09 Thread Durga Deep
We have a machine that has 2GB of physical memory ( source prtconf ).

When I create zones (say 4), how does the physical memory of the machine get 
impacted ?. Is  there a performance hit ?. Please share your responses.

_DD
 
 
This message posted from opensolaris.org
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