What Linux version are you using?
Check the difference between free memory and available memory.
With older Linux versions check the -/+ buffers/cache: line.
The buffers/cache/slab memory is memory that is used to speed up things, but that is available when an application needs it.
So consider leaving that out when reporting memory usage..
--
When used with [[ .. ]] , the < and > operators sort lexicographically using the current locale. So it is a string comparison which may lead to surprising results.
For numerical comparison use either the test utility :
like Neo suggested,
or use bash' s arithmetic comparison
Note: like the test utility, arithmetic comparison in bash cannot handle floating point. So you need to round down / truncate the numbers used in the comparison. So for example use LOAD=80 rather than LOAD=80.00. If you need floating point you need to use an external utility like bc.
Last edited by Scrutinizer; 12-27-2019 at 09:48 AM..
Hi Unix Gurus i am somewhat new to unix scripting so need your help to
create a script as below.
# This script would find the process consuming memory beyond a certain #limit. if the meemory consumption is more than 100% for a period of 1
# minute for the specific process. the script would... (0 Replies)
Hi,
I have a NETRA 240 server wich should work on high temperature environment (up to 50 deg celsius). After reaching ~48 deg, the system is shuting down.
The HighShutDownThreshold of the CPU is set to 89 deg
The PowerOffThreshold of the CPU is set to 96 deg
Please help me to change these... (2 Replies)
Hello, I noticed very high system memory utilization on my new 11.31 Itanium systems. System memory is more than 11GB on 32 GB system. Comparing this to 11.23 it's more than double ... How do I find out what is using it? Is there a way to reduce it?
Thank you,
Kubo (4 Replies)
Calling upon all Solaris zone experts.
I have a Sun T3-1 that is running a few whole-root zones. I've set the 'capped-memory' setting on all the zones.
However, I have a problem on the one zone. Under load it uses more memory that has been allocated to it.
zonecfg -z sunrep02 export
... (4 Replies)
hi guys
the monitoring team is using a tool for monitoring linux boxes and they set an alarm for swap memory to 10%(critical) I really has no idea when swap memory usage is high....
Can someone recommend me a threshold for this? when is warning or critical and this parameters can affect... (3 Replies)
Hello,
I'd like to set a cron job that runs a shell script every 30 minutes or so to restart a java based service if the memory gets above 80%. Any advice on how to do this?
Thanks in advance!
- Ryan (19 Replies)
Hi Experts,
Our servers running Solaris 10 with SAP Application. The memory utilization always >90%, but the process on SAP is too less even nothing.
Why memory utilization on solaris always looks high?
I have statement about memory on solaris, is this true:
Memory in solaris is used for... (4 Replies)
Hello Guys,
I have one Solaris server with high memory utilization >90%. As per checking, below is the output for memory usage.
bash-3.00# ps -efo pmem,uid,pid,ppid,pcpu,comm | sort -r
%MEM UID PID PPID %CPU COMMAND
1.7 29496 20668 1 0.0 /opt/app/iw-home/tools/java/bin/java
1.5... (1 Reply)
If I understand your question correctly, you are asking for an explanation of Solaris memory manager. You'd better ask Oracle that question because you are talking about Solaris kernel internals.
The operating system kernel has no reason to kick a process's memory set out of real memory until... (4 Replies)
Discussion started by: hicksd8
4 Replies
LEARN ABOUT OPENDARWIN
integer
integer(3pm) Perl Programmers Reference Guide integer(3pm)NAME
integer - Perl pragma to use integer arithmetic instead of floating point
SYNOPSIS
use integer;
$x = 10/3;
# $x is now 3, not 3.33333333333333333
DESCRIPTION
This tells the compiler to use integer operations from here to the end of the enclosing BLOCK. On many machines, this doesn't matter a
great deal for most computations, but on those without floating point hardware, it can make a big difference in performance.
Note that this only affects how most of the arithmetic and relational operators handle their operands and results, and not how all numbers
everywhere are treated. Specifically, "use integer;" has the effect that before computing the results of the arithmetic operators (+, -,
*, /, %, +=, -=, *=, /=, %=, and unary minus), the comparison operators (<, <=, >, >=, ==, !=, <=>), and the bitwise operators (|, &, ^,
<<, >>, |=, &=, ^=, <<=, >>=), the operands have their fractional portions truncated (or floored), and the result will have its fractional
portion truncated as well. In addition, the range of operands and results is restricted to that of familiar two's complement integers,
i.e., -(2**31) .. (2**31-1) on 32-bit architectures, and -(2**63) .. (2**63-1) on 64-bit architectures. For example, this code
use integer;
$x = 5.8;
$y = 2.5;
$z = 2.7;
$a = 2**31 - 1; # Largest positive integer on 32-bit machines
$, = ", ";
print $x, -$x, $x + $y, $x - $y, $x / $y, $x * $y, $y == $z, $a, $a + 1;
will print: 5.8, -5, 7, 3, 2, 10, 1, 2147483647, -2147483648
Note that $x is still printed as having its true non-integer value of 5.8 since it wasn't operated on. And note too the wrap-around from
the largest positive integer to the largest negative one. Also, arguments passed to functions and the values returned by them are not
affected by "use integer;". E.g.,
srand(1.5);
$, = ", ";
print sin(.5), cos(.5), atan2(1,2), sqrt(2), rand(10);
will give the same result with or without "use integer;" The power operator "**" is also not affected, so that 2 ** .5 is always the
square root of 2. Now, it so happens that the pre- and post- increment and decrement operators, ++ and --, are not affected by "use
integer;" either. Some may rightly consider this to be a bug -- but at least it's a long-standing one.
Finally, "use integer;" also has an additional affect on the bitwise operators. Normally, the operands and results are treated as unsigned
integers, but with "use integer;" the operands and results are signed. This means, among other things, that ~0 is -1, and -2 & -5 is -6.
Internally, native integer arithmetic (as provided by your C compiler) is used. This means that Perl's own semantics for arithmetic
operations may not be preserved. One common source of trouble is the modulus of negative numbers, which Perl does one way, but your
hardware may do another.
% perl -le 'print (4 % -3)'
-2
% perl -Minteger -le 'print (4 % -3)'
1
See "Pragmatic Modules" in perlmodlib, "Integer Arithmetic" in perlop
perl v5.12.1 2010-04-26 integer(3pm)