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Top Forums UNIX for Dummies Questions & Answers determine total memory used by some user/process Post 302343463 by cromohawk on Wednesday 12th of August 2009 02:16:31 PM
Old 08-12-2009
determine total memory used by some user/process

HI guys,

Smiliei would like to know how can i determine
the total/approx memory used by a single user. Example Top output is below

===========================================================================
Code:
top - 20:00:50 up 24 days,  2:48,  2 users,  load average: 0.43, 0.40, 0.37
Tasks: 172 total,   2 running, 170 sleeping,   0 stopped,   0 zombie
Cpu(s):  4.3% us,  0.7% sy,  0.0% ni, 95.0% id,  0.0% wa,  0.0% hi,  0.0% si
Mem:  24954784k total, 23561312k used,  1393472k free,   318788k buffers
Swap:  2031608k total,        4k used,  2031604k free, 21011868k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
 7172 rtx       16   0 73696  34m 3352 R   10  0.1 247:50.05 mysqld
 5189 rtx       16   0  322m 316m 4268 S    3  1.3  60:50.34 some.f
 5193 rtx       16   0  327m 321m 4264 S    2  1.3  60:14.19 some.f
16015 rtx       15   0 73696  34m 3352 S    1  0.1 139:45.09 mysqld

===========================================================================

From the Top output above i found that the memory usage is about 94%. There are about 45 processes owned by "rtx" user.Am wondering if there is any method i

Last edited by vgersh99; 08-12-2009 at 03:43 PM.. Reason: code tags, PLEASE!
 

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sg_get_mem_stats(3)					     Library Functions Manual					       sg_get_mem_stats(3)

NAME
sg_get_mem_stats, sg_get_swap_stats - get VM statistics SYNOPSIS
#include <statgrab.h> sg_mem_stats *sg_get_mem_stats(void); sg_swap_stats *sg_get_swap_stats(void); DESCRIPTION
Memory statistics are accessed through the sg_get_mem_stats function. It returns a pointer to a static sg_mem_stats. The sg_get_swap_stats returns returns swap statistics. It returns a pointer to a static sg_swap_stats. On the FreeBSD operating system elevated privileges are required to access the swap statistics. Making the program setgid kmem should be sufficient. Programs running as root will not have this problem. RETURN VALUES
The VM system calls can return a pointer to either a sg_mem_stats or a sg_swap_stats. typedef struct{ long long total; long long free; long long used; long long cache; }sg_mem_stats; total The total amount of memory in bytes. free The total free memory in bytes. used The total used memory in bytes. cache The amount of cache used in bytes. typedef struct{ long long total; long long used; long long free; }sg_swap_stats; total The total swap space in bytes. used The used swap in bytes. free The free swap in bytes. TODO
Add a function to hold open the file descriptor to the kernel memory structures. Doing this would allow the elevated privileges to be dropped early on. SEE ALSO
statgrab(3) WEBSITE
http://www.i-scream.org/libstatgrab/ i-scream $Date: 2005/04/25 11:25:45 $ sg_get_mem_stats(3)
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