08-16-2011
Quote:
In my understanding some process should be consuming atleast 15-16 G but I am not able to find them.
No. A lot of memory is used by the kernel for cashing and buffers (it's almost free memory too). You can see this in "top" or with "free" command.
10 More Discussions You Might Find Interesting
1. AIX
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
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
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
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
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
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
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
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
#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
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
LEARN ABOUT REDHAT
malloc_trim
MALLOC_TRIM(3) Linux Programmer's Manual MALLOC_TRIM(3)
NAME
malloc_trim - release free memory from the top of the heap
SYNOPSIS
#include <malloc.h>
int malloc_trim(size_t pad);
DESCRIPTION
The malloc_trim() function attempts to release free memory at the top of the heap (by calling sbrk(2) with a suitable argument).
The pad argument specifies the amount of free space to leave untrimmed at the top of the heap. If this argument is 0, only the minimum
amount of memory is maintained at the top of the heap (i.e., one page or less). A nonzero argument can be used to maintain some trailing
space at the top of the heap in order to allow future allocations to be made without having to extend the heap with sbrk(2).
RETURN VALUE
The malloc_trim() function returns 1 if memory was actually released back to the system, or 0 if it was not possible to release any memory.
ERRORS
No errors are defined.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+--------------+---------------+---------+
|Interface | Attribute | Value |
+--------------+---------------+---------+
|malloc_trim() | Thread safety | MT-Safe |
+--------------+---------------+---------+
CONFORMING TO
This function is a GNU extension.
NOTES
This function is automatically called by free(3) in certain circumstances; see the discussion of M_TOP_PAD and M_TRIM_THRESHOLD in mal-
lopt(3).
This function cannot release free memory located at places other than the top of the heap.
This function releases only memory in the main arena.
SEE ALSO
sbrk(2), malloc(3), mallopt(3)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux 2017-09-15 MALLOC_TRIM(3)