05-09-2011
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
I have discovered a curious phenomenon in GCI. I need some advice from someone far more adept. Is this a bug or potential security weakness?
Context: Redhat 8.0 on xx86 (pentium 3) Apache 2.0, Perl 5.80
Background:
I've been trying to harden a web application which accepts user uploaded... (0 Replies)
Discussion started by: andyj
0 Replies
2. Shell Programming and Scripting
I dont know whether this is a common error but it seems my PERL program is running out of buffer memory. Inside a loop I am processing an array (reading elements and displaying in it--note: for every iteration of the loop the WHOLE array is being scanned once--...the array was created by reading a... (5 Replies)
Discussion started by: Abhishek Ghose
5 Replies
3. UNIX for Dummies Questions & Answers
Could somebody give links for memory detector for perl?
Thanks :) (4 Replies)
Discussion started by: matrixmadhan
4 Replies
4. Shell Programming and Scripting
I have a program that opens a file handle that reads a lot of logs, it uses globbing, for example ba* matches bananas.log, bank.log, etc. I have seven different names, each with several logs that I run to a grep pattern. I have subroutines for each match and a loop w/o args that processes this. ... (5 Replies)
Discussion started by: nj78
5 Replies
5. Shell Programming and Scripting
Hi,
Is there any known trick that will consume all of my memory and force my machine to swap? I'm scripting a monitor in perl that will alert me when available memory is dangerously low and system is swapping, and I would like to simulate the scenario. I am clueless how to make my system lack... (4 Replies)
Discussion started by: marcpascual
4 Replies
6. Shell Programming and Scripting
I currently have a statistics gathering script i run on my Linux servers. One of the stat i gather is total memory in the machine. The script is all perl with the exception of gathering the memory for that i use the following command:
$ram = (`cat /proc/meminfo | grep "MemTotal" | awk... (1 Reply)
Discussion started by: insania
1 Replies
7. Shell Programming and Scripting
I am running a program written in perl script and it is stopped with "Out of memory!" error. This is very strange because at the time then the program is aborted, it only used 4GB RAM and there are still 30GB free physical memory left in the system. I check the perl script and found the program... (3 Replies)
Discussion started by: lilili07
3 Replies
8. Shell Programming and Scripting
Experts,
We used to receive our source files with '~^' as row delimiter. This file contains 2500K records and two of the columns having value in HTML formats within the file.
While running the below commands against the file, we are encountering out of memory, could you please help to... (3 Replies)
Discussion started by: srivijay81
3 Replies
9. Shell Programming and Scripting
Hi I am working with a 3.0 GB file and running the following script to process it. After running for 15 minutes, the script stops saying Out of memory or Killed.
Can the experts suggest where my code can be improved to save memory?
Thanks in advance.
#! usr/bin/perl
use warnings;
open... (3 Replies)
Discussion started by: polsum
3 Replies
10. Shell Programming and Scripting
I am getting a out of memory issue while executing the perl program.
Per version : /opt/acc_perl/lib/site_perl/5.14.2
Read in 54973 total records
Read in 54973 table records from table.
Out of memory!
so the job get failed due to out of memory. need to get rid of the out of memory... (3 Replies)
Discussion started by: ramkumar15
3 Replies
FREE(1) User Commands FREE(1)
NAME
free - Display amount of free and used memory in the system
SYNOPSIS
free [options]
DESCRIPTION
free displays the total amount of free and used physical and swap memory in the system, as well as the buffers and caches used by the ker-
nel. The information is gathered by parsing /proc/meminfo. The displayed columns are:
total Total installed memory (MemTotal and SwapTotal in /proc/meminfo)
used Used memory (calculated as total - free - buffers - cache)
free Unused memory (MemFree and SwapFree in /proc/meminfo)
shared Memory used (mostly) by tmpfs (Shmem in /proc/meminfo)
buffers
Memory used by kernel buffers (Buffers in /proc/meminfo)
cache Memory used by the page cache and slabs (Cached and SReclaimable in /proc/meminfo)
buff/cache
Sum of buffers and cache
available
Estimation of how much memory is available for starting new applications, without swapping. Unlike the data provided by the cache or
free fields, this field takes into account page cache and also that not all reclaimable memory slabs will be reclaimed due to items
being in use (MemAvailable in /proc/meminfo, available on kernels 3.14, emulated on kernels 2.6.27+, otherwise the same as free)
OPTIONS
-b, --bytes
Display the amount of memory in bytes.
-k, --kibi
Display the amount of memory in kibibytes. This is the default.
-m, --mebi
Display the amount of memory in mebibytes.
-g, --gibi
Display the amount of memory in gibibytes.
--tebi Display the amount of memory in tebibytes.
--pebi Display the amount of memory in pebibytes.
--kilo Display the amount of memory in kilobytes. Implies --si.
--mega Display the amount of memory in megabytes. Implies --si.
--giga Display the amount of memory in gigabytes. Implies --si.
--tera Display the amount of memory in terabytes. Implies --si.
--peta Display the amount of memory in petabytes. Implies --si.
-h, --human
Show all output fields automatically scaled to shortest three digit unit and display the units of print out. Following units are
used.
B = bytes
K = kibibyte
M = mebibyte
G = gibibyte
T = tebibyte
P = pebibyte
If unit is missing, and you have exbibyte of RAM or swap, the number is in tebibytes and columns might not be aligned with header.
-w, --wide
Switch to the wide mode. The wide mode produces lines longer than 80 characters. In this mode buffers and cache are reported in two
separate columns.
-c, --count count
Display the result count times. Requires the -s option.
-l, --lohi
Show detailed low and high memory statistics.
-s, --seconds delay
Continuously display the result delay seconds apart. You may actually specify any floating point number for delay using either .
or , for decimal point. usleep(3) is used for microsecond resolution delay times.
--si Use kilo, mega, giga etc (power of 1000) instead of kibi, mebi, gibi (power of 1024).
-t, --total
Display a line showing the column totals.
--help Print help.
-V, --version
Display version information.
FILES
/proc/meminfo
memory information
BUGS
The value for the shared column is not available from kernels before 2.6.32 and is displayed as zero.
Please send bug reports to
<procps@freelists.org>
SEE ALSO
ps(1), slabtop(1), top(1), vmstat(8).
procps-ng 2016-06-03 FREE(1)