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Operating Systems Solaris Zones and memory resource control issues Post 302479306 by jlliagre on Friday 10th of December 2010 09:15:49 AM
Old 12-10-2010
There must be a reason but I wouldn't spend time to investigate the Total vs Physical values discrepancy. It is unrelated to your issue anyway.
You are confusing RAM and virtual memory in your statement:
Quote:
Solaris doing something like "eager ahead of time allocation", in the anticipation that it might need that memory in the future?
Allocation is done on virtual memory, not RAM. When a process is asking for 2 GB of memory, no RAM is involved. Only when that memory is written to or read from is does it need to be in RAM, and that won't be 2 GB but the memory pages accessed, not more.
Unlike Linux, AIX and others, Solaris doesn't overcommit memory so it is making sure all allocations are backed by either RAM or swap at allocation time.
On the opposite, Gnu/Linux doesn't do it so in case of memory shortage, is just killing otherwise healthy processes to free RAM which might not be what people expect from their OS.
 

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install-solaris(1M)													       install-solaris(1M)

NAME
install-solaris - install the Solaris operating system SYNOPSIS
install-solaris install-solaris invokes the Solaris Install program. Depending on graphical capability and available memory at the time of invocation, install-solaris invokes either a text-based installer or a graphical installer. The following minimum requirements for physical memory dictate which features are available during installation: For SPARC machines: 128 MB Minimum physical memory for all installation types 128 MB Minimum physical memory required for windowing system 384 MB Minimum physical memory required for graphical-based installation For x86 machines: 256 MB Minimum physical memory for all installation types 256 MB Minimum physical memory required for windowing system 512 MB Minimum physical memory required for graphical-based installation In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number of fea- tures available. install-solaris exists only on the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the for more details. install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the installation media. Refer to the for disk space requirements. Refer to the for more information on the various menus and selections. See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcdrom (Solaris instal- | | |lation media) | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ pkginfo(1), install(1M), pkgadd(1M), attributes(5) It is advisable to exit install-solaris by means of the exit options in the install-solaris menus. 23 Sep 2005 install-solaris(1M)
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