03-16-2006
unix top command (memory usage)
in unix when i use top
i get an output like this:
load averages: 0.64, 0.57, 0.53 14:04:42
347 processes: 1 running, 1 waiting, 169 sleeping, 172 idle, 4 stopped
CPU states: 16.4% user, 2.8% nice, 7.6% system, 73.0% idle
Memory: Real: 1532M/3964M act/tot Virtual: 7767M/45341M use/tot Free: 75M
my question is why we dont get the total memory when we add Free memory
to actual memory?
1532(act)+75(free)!=3964 (total)
and
7767(use)+75(free)!=45431(total)
and my second question is:
what kind of information we can get from the first line
(load averages: 0.64, 0.57, 0.53 )
and lastly:
i have a system>> Compaq Tru64 UNIX V5.1B
how can i get information about swap activity?
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hello all
im working on sunos machine that dont have the top installed and can't be
install , now i need to get information similar to what top gives me about the cpu usage and so
can it be done somehow else where ? (3 Replies)
Discussion started by: umen
3 Replies
2. HP-UX
how can I find cpu usage memory usage swap usage and
I want to know CPU usage above X% and contiue Y times and memory usage above X % and contiue Y times
my final destination is monitor process
logical volume usage above X % and number of Logical voluage above
can I not to... (3 Replies)
Discussion started by: alert0919
3 Replies
3. UNIX for Dummies Questions & Answers
Hi there. I was looking at the output from running top and for short amounts of time, when I see all the process running and add up the values in the %CPU column the value exceeds 100% (I just add them quickly in my head). I assume that if I were to add up all my processes in the entire list,... (2 Replies)
Discussion started by: Carl1976
2 Replies
4. UNIX for Dummies Questions & Answers
Ok, so I am using the Top command on my linux VPS to try and see the processes using the most CPU %.
I hit the P to sort by CPU % but it wants to sort them from lowest to highest (ascending). My Telnet-SSH screen is only about 60 rows high so the processes with the highest CPU % usage are at the... (6 Replies)
Discussion started by: davemehta
6 Replies
5. Shell Programming and Scripting
Hi all,
I found like top command could be used to find the Memory and CPU utilization. But i want to know how to find the Memory and CPU utilization for a particular user using top command.
Thanks in advance.
Thanks,
Ananthi.U (2 Replies)
Discussion started by: ananthi_ku
2 Replies
6. Solaris
Hi all,
I have a server running an Oracle database that is part of a Solaris M5000 container. Presumably this is referred to as a zone within a cluster, not sure if I get the terminology right.
Anyway, a third-party manages the zone and unfortunately is not "helpful/friendly" to assist me on... (1 Reply)
Discussion started by: newbie_01
1 Replies
7. Solaris
Hi all,
OS Version:
SunOS <hostname> 5.10 Generic_142900-13 sun4v sparc SUNW,Sun-Blade-T6340
I need some expert guidance on investigating memory usage on Solaris. I want to know whether am interpreting the output from ps -efl correctly and whether the command top is showing the right... (3 Replies)
Discussion started by: newbie_01
3 Replies
8. UNIX for Dummies Questions & Answers
Hi all,
Is it possible to get total memory usage and free memory usage without top? By Googling I found for total memory usage, use vmstat, for CPU, use mpstat, for disk I/O use iostat, is this correct? Will using sar gives the same result as ALL of these three (3) commands?
What about if I... (2 Replies)
Discussion started by: newbie_01
2 Replies
9. UNIX for Dummies Questions & Answers
Hi all,
Can you please tell me the command, with which one can know the amount of space a specific directory has used.
df -k . ---> Displays, the amount of space allocated, and used for a directory.
du -k <dir name> - gives me the memory used of all the files inside <dir>
But i... (2 Replies)
Discussion started by: abhisheksunkari
2 Replies
10. Linux
Hi,
Yersterday I started monitoring my homeserver memory consumition due some errors found in the system (network hangs). I've detected almost all the memory used (~10 MB free from 1GB).
First I thought it was because of the MySQL configuration, so I monitored it with top and found it wasn't... (6 Replies)
Discussion started by: nefeli
6 Replies
LEARN ABOUT DEBIAN
sg_get_cpu_percents
sg_get_cpu_stats(3) Library Functions Manual sg_get_cpu_stats(3)
NAME
sg_get_cpu_stats, sg_get_cpu_stats_diff, sg_get_cpu_percents - get cpu usage
SYNOPSIS
#include <statgrab.h>
sg_cpu_percents *sg_get_cpu_percents(void);
sg_cpu_stats *sg_get_cpu_stats(void);
sg_cpu_stats *sg_get_cpu_stats_diff(void);
DESCRIPTION
sg_get_cpu_stats() and sg_get_cpu_stats_diff() both return static pointers of type sg_cpu_stats. sg_get_cpu_stats() returns the total
amount of "ticks" the operating system has spent in each of the different states. sg_get_cpu_stats_diff() returns the difference in "ticks"
for each of the states since last time sg_get_cpu_stats_diff() or sg_get_cpu_stats() was called. If it has never been called, it will
return the result of sg_get_cpu_stats().
The value stored (the "ticks") will vary between operating systems. For example Solaris has a total of 100 per second, while Linux has sub-
stantially more. Also, different operating systems store different information - you won't find nice cpu on Solaris for example.
Because of this, you will ideally always want to work on a scale against the total, or in percentages.
sg_get_cpu_percents() returns a pointer to a static sg_cpu_percents. The function calls sg_get_cpu_stats_diff() and changes the values into
percentages. If it has never been called before (and nor has sg_get_cpu_stats() or sg_get_cpu_stats_diff()), the returned percentages will
be the systems total ever since its uptime. (Unless the counters have cycled)
RETURN VALUES
There are two structures returned by the CPU statistics functions.
typedef struct{
long long user;
long long kernel;
long long idle;
long long iowait;
long long swap;
long long nice;
long long total;
time_t systime;
}sg_cpu_stats;
typedef struct{
float user;
float kernel;
float idle;
float iowait;
float swap;
float nice;
time_t time_taken;
}sg_cpu_percents;
user kernel idle iowait swap nice
The different CPU states.
systime time_taken
The time taken in seconds since the last call of the function, or the system time.
SEE ALSO
statgrab(3)
WEBSITE
http://www.i-scream.org/libstatgrab/
i-scream $Date: 2005/04/25 11:25:45 $ sg_get_cpu_stats(3)