Visit Our UNIX and Linux User Community

Top Forums Shell Programming and Scripting Discrepancy in finding the top memory consuming processes Post 302547495 by prasperl on Tuesday 16th of August 2011 01:21:06 AM
Old 08-16-2011
Discrepancy in finding the top memory consuming processes

When I run 'top' command,I see the following
Memory: 32G real, 12G free, 96G swap free

Though it shows as 12G free,I am not able to account for processes that consume the rest 20G.

In my understanding some process should be consuming atleast 15-16 G but I am not able to find them.

Is there any other way?
Test Your Knowledge in Computers #65
Difficulty: Easy
In the TCP/IP model, end-to-end connectivity is provided from host-to-host in the transport layer.
True or False?

10 More Discussions You Might Find Interesting

1. AIX

Process consuming most memory

How can i find the processes that is consuming most memory? I tried TOPAS and SVMON and this didn't gave me the desired result. (1 Reply)
Discussion started by: shabu
1 Replies

2. AIX

Command to find TOP 5 Memory consuming process

HI All, Can anyone send me a command to find TOP 5 Memory consuming process. It would be lelpful if I get output something like below processname - pid - memory(in MB) - command I tried few commands from the internet but the result only give the real memory usage or pagging, I want total... (4 Replies)
Discussion started by: bce_groups
4 Replies

3. AIX

Need a list of top 10 CPU using processes (also top 10 memory hogs, separately)

Okay, I am trying to come up with a multi-platform script to report top ten CPU and memory hog processes, which will be run by our enterprise monitoring application as an auto-action item when the CPU and Memory utilization gets reported as higher than a certain threshold I use top on other... (5 Replies)
Discussion started by: thenomad
5 Replies

4. UNIX for Advanced & Expert Users

AIX: Finding processes attached to shared memory

Is there some way to tell what processes are attached to a shared memory segment? We have a system on which I perform "icps -ma" and there are several segments pending deletion having numerous processes attached to them and I can't tell what processes they are. Neither the creator's pid nor last... (7 Replies)
Discussion started by: DreamWarrior
7 Replies

5. Shell Programming and Scripting

Warning in Top 10 cpu consuming processes

I m using following command to find top 10 cpu consuming processes. However whenever i execute the command i get following warning. What can be done to avoid it? # ps -auxf | sort -nr -k 3 | head -10 Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ root ... (6 Replies)
Discussion started by: pinga123
6 Replies

6. Shell Programming and Scripting

Unix shell script to query linux top consuming processes

Hi All, O/S: Linux 86x64 Red Hat I have a sql script that queries top consuming processes of Linux using TOP commnd. Now I need to automate this task and pass the top processes i.e., PID to the sql script through unix shell script. Could anyone please let me know how to achieve this. ... (2 Replies)
Discussion started by: a1_win
2 Replies

7. AIX

Which process was consuming most memory in the Past?

Hello There are options / commands to check which process is consuming maximum memory However is there any command/mechanism which will tell us which process was consuming maximum memory in specific time interval in the past? I heard nmon report can help in this regard. is there any... (5 Replies)
Discussion started by: Chetanz
5 Replies

8. UNIX for Dummies Questions & Answers

Finding the most memory consuming processes in Linux

Platform: Oracle Linux 6.4 To find the most memory consuming processes, I tried the following 2 methods 1. Method1 # ps aux | head -1 ; ps aux | sort -nk +4 | tail -7 USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 95 0.0 0.0 0 0 ? ... (2 Replies)
Discussion started by: kraljic
2 Replies

9. Programming

Memory and cache access time discrepancy

#include<stdio.h> #include<stdlib.h> #include<sys/time.h> #include<time.h> #include "rdtsc.h" #define SIZE 4*64*1024 int main() { unsigned long long a,b; int arr={0}; int i; register int r; a=rdtsc(); r=arr; b=rdtsc(); printf("1st element Access Cycles = %llu\n",b-a); (2 Replies)
Discussion started by: Vaibhavs1985
2 Replies

10. UNIX for Beginners Questions & Answers

Top 5 cpu and Mem consuming process and files and suggestion for health check

I am middle of writing health check scripts, can you pls share commands on how I can get cpu and Mem of top consuming process info at the moment? Also can u suggest ideas on what all I can look for as a part do health check on red hat Linux server? I searched on site before posting, but... (2 Replies)
Discussion started by: Varja
2 Replies
FREE(1)                                                            User Commands                                                           FREE(1)

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 <> SEE ALSO
ps(1), slabtop(1), top(1), vmstat(8). procps-ng 2016-06-03 FREE(1)

Featured Tech Videos

All times are GMT -4. The time now is 08:01 AM.
Unix & Linux Forums Content Copyright 1993-2021. All Rights Reserved.
Privacy Policy