Your config is basically what you want. The zone will be able to reserve
up to 6gb of memory, 4 of which may reside in physical memory. The 4gb of
ram is not reserved for the zone, so the zone could get less RAM due to
global memory pressure, and use more than 2gb of disk swap. For instance,
the zone could get 3 gb of ram and 3gb of disk swap (for a total of 6gb of
virtual memory).
-Steve L.
On Mon, Feb 23, 2009 at 09:06:13PM +0100, Bernd Schemmer wrote:
Hi,
So if we want a to configure a Zone with 4 GB physical memory and max 2
GB swap the values have to be
apped-memory:
physical: 4G
[swap: 6G]
Is that correct?
I just reread the documentation about swap and from that it's not clear
to me that swap in the zone configuration is used that way
regards
Bernd
Steve Lawrence wrote:
Swap limits how much of the systems total memory (ram + disk) can be
reserved.
When this limit is hit, allocations, such as malloc, will fail. Physical
memory limits resident memory. When this limit is hit, the zone will page
pages in memory to disk swap.
In general, your example config is only useful if the zone uses a lot of
physical memory, but does not reserve as much swap. An example is an
application which maps a large on-disk file into memory. No swap is needed
for the file, (because the file can be paged back to the a filesystem),
but a
large amount of physical memory may be needed to pull the file into RAM.
Such applications are rare, so your example config is not often used. Your
basically right is saying that this config does not make any sense in most
cases.
-Steve L.
On Fri, Feb 20, 2009 at 08:36:20PM +0100, Alexander Skwar wrote:
Hi!
On Fri, Feb 20, 2009 at 17:50, Asif Iqbal vad...@gmail.com wrote:
capped-memory:
physical: 1G
[swap: 512M]
A question regarding this setting - does that setting really make
sense? I suppose he tries to achieve that the zone as a max.
uses 1G of real memory and no more than 512M of Swap.
But does it really do that?
Or is he rather limiting the amount of allocable mem to 512M?
Alexander
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