@corona, thanks that was a relief. I logged a case with RHEL just in case and they told me the same thing you did but in totally incomprehensible terms
@mark, thanks for the vmstat syntax. I suppose cat /proc/meminfo provided me with more or less the same info
@murphy, I did check the link you provided but I got lost halfway thru I think I was just too stressed to figure it out yesterday!
Anyways, just in case someone comes across this thread and wants answers, following is the math concoction:
Code:
For example (Units are in megabytes):
# free -m
total used free shared buffers cached
Mem: 1000 900 100 0 350 350
-/+ buffers/cache: 200 800
In this example, as far as applications are concerned the system is using only 200MB of memory and has 800MB free and available for use if needed.
Note: in this example,
Total Physical Memory = 1000 M
Physically Used Memory = 900 M
Actual used memory = 200 M
buffers = 350 M
cached = 350 M
Physically Free Memory = 100 M
Memory free for Applications = 800 M
The items to note here are:
<Physically Used Memory> = <Actual used memory> + <buffers> + <cache> = 200 + 350 + 350 = 900 M
<Physically Free Memory> = <Total Physical Memory> - <Actual used memory> - <buffers> - <cache> = 1000 - 200 - 350 - 350 = 100 M
<Memory free for Applications> = <Total Physical Memory> - <Actual used memory> = 1000 - 200 = 800 M
<Memory used by Applications> = <Physically Used Memory> - <buffers> - <cache> = 900 - 350 - 350 = 200 M
Hy, I've an 486 dx2 laptop an I want to run unix on it, the problem is it has only 4 megabytes of ram, so my question is; does anybody know an unix based OS which runs with only 4 mb?
thanx (7 Replies)
Hi,
I am seeing very high kernel usage and very high load averages on my system (Although we are not loading much data to our database). Here is the output of top...does anyone know what i should be looking at?
Thanks,
Lorraine
last pid: 13144; load averages: 22.32, 19.81, 16.78 ... (4 Replies)
Hi All,
In my application malloc is returning NULL even though there is sufficient amount of free memory is available but swap memory is low.
Is this possible that, if free memory is high & swap memory is low, malloc will not be able to allocate memory & return NULL ?:)
Kindly look into... (5 Replies)
on the file Ftp'd from the mainframe ,do we have any UNIX command to replace mainframe low and values to space or null.
i tried using tr and it doesn't work ...
Thanks (1 Reply)
Is it possible to have a bash script pick the highest and lowest values of four variables? I've been googling for this but haven't come up with anything. I have a script that assigns variables ($c0, $c1, $c2, and $c3) based on the coretemps from grep/sed statements of sensors. I'd like to also... (5 Replies)
Hi guys,
i have a question about spliting a binary file into 2 chunks.
First chunk with all high bytes and the second one with all low bytes.
What unix tools can i use? And how can this be performed?
I looked in manpages of split and dd but this does not help.
Thanks (2 Replies)
I've got a domain running on a few boards of a 25k. I'm seeing very high kernel cpu usage in top and cant' quite explain it. System runs a large number of smallish Oracle 10g2 databases (30), used mainly for development.
load average: 36.63, 36.68, 37.42
2489 processes: 2452 sleeping, 21... (0 Replies)
Need some clarification on this....
1. how are kernel/ user spaces and high/low memory related?
2. What do they all mean when i have the kernel command line as:
"console=ttyS0,115200 root=/dev/sda2 rw mem=exactmap memmap=1M@0 memmap=96M@1M irqpoll"
or
2. what do mem and memmap mean in... (3 Replies)
Hello All
I have a system running AIX 61 shared uncapped partition (with 11 physical processors, 24 Virtual 72GB of Memory) .
The output from NMON, vmstat show a high run queue (60+) for continous periods of time intervals, but NO paging, relatively low I/o (6000) , CPU % is 40, Low network.... (9 Replies)
Discussion started by: IL-Malti
9 Replies
LEARN ABOUT OPENSOLARIS
lx
lx(5) Standards, Environments, and Macros lx(5)NAME
lx - Linux branded zone
DESCRIPTION
The lx brand uses the branded zones framework described in brands(5) to enable Linux binary applications to run unmodified on a machine
with a Solaris Operating System kernel.
The lx brand includes the tools necessary to install a CentOS 3.x or Red Hat Enterprise Linux 3.x distribution inside a non-global zone.
The brand supports the execution of 32-bit Linux applications on x86/x64 machines running the Solaris system in either 32-bit or 64-bit
mode.
Supported Linux Distributions
The lx brand emulates the system call interfaces provided by the Linux 2.4.21 kernel, as modified by Red Hat in the RHEL 3.x distributions.
This kernel provides the system call interfaces consumed by the glibc version 2.3.2 released by Red Hat.
In addition, the lx brand partially emulates the Linux /dev and /proc interfaces.
Configuration and Administration
The lx brand supports the whole root non-global zone model. All of the required linux packages are installed into the private file systems
of the zone.
The zonecfg(1M) utility is used to configure an lx branded zone. Once a branded zone has been installed, that zone's brand cannot be
changed or removed. The zoneadm(1M) utility is used to report the zone's brand type and administer the zone. The zlogin(1) utility is used
to log in to the zone.
Application Support
The lx zone only supports user-level Linux applications. You cannot use Linux device drivers, Linux kernel modules, or Linux file systems
from inside an lx zone.
You cannot add any non-standard Solaris devices to a Linux zone. Any attempt to do so will result in a zone that zonecfg(1M) will refuse to
verify.
You cannot run Solaris applications inside an lx zone. Solaris debugging tools such as DTrace (see dtrace(1M)) and mdb (see mdb(1)) can be
applied to Linux processes executing inside the zone, but the tools themselves must be running in the global zone. Any core files generated
are produced in the Solaris format, and such files can only be debugged with Solaris tools.
ATTRIBUTES
See attributes(5) for a description of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWlxr, SUNWlxu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO mdb(1), zlogin(1), zonename(1), dtrace(1M), zoneadm(1M), zonecfg(1M), brands(5), zones(5), lx_systrace(7D)SunOS 5.11 19 Sep 2006 lx(5)
04-16-2012
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