01-30-2015
10 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi,
I am seeing very high kernel usage and very high load averages on my system (Although we are not loading much data to our database). Here is the output of top...does anyone know what i should be looking at?
Thanks,
Lorraine
last pid: 13144; load averages: 22.32, 19.81, 16.78 ... (4 Replies)
Discussion started by: lorrainenineill
4 Replies
2. AIX
Hi,
We have AIX 5.1 machine of RAM 8 GB and paging space is 8GB. we are getting high memory usage of almost 99%.Can anybody please help in this ?
Partial vmstat o/p
kthr memory
----- -----------
r b avm fre
2 1 278727 1143
There is no paging issue.Becoz in... (5 Replies)
Discussion started by: jayakumarrt
5 Replies
3. 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
4. UNIX for Advanced & Expert Users
Hello all,
I am facing a memory related issue on my linux that is CentOS 4.0. What I see as an output of top command, free command is that memory usage is almost 90% which is quite high without much load on the system. This is continuously showing 90% or so of memory usage with top or free... (2 Replies)
Discussion started by: radiatejava
2 Replies
5. AIX
hi,
I want to ask , my AIX 6.1 is always used about 97% memory.
Is this normal ?
or any command can free up memory like Linux ?
thanks. (1 Reply)
Discussion started by: virusxx
1 Replies
6. Shell Programming and Scripting
can any one please help me to shell script
high memory usage alert (6 Replies)
Discussion started by: robo
6 Replies
7. Linux
Hi friends,
Problem: High memory utilisation of one linux server, due to which a database crashed on the server.
My question to all: How does glance calculate that memory utilisation on the linux server is 98%.
I mean what components are part of (31.4gb-599mb)? How can i check that myself? Can... (3 Replies)
Discussion started by: kunwar
3 Replies
8. Red Hat
Hello All,
We have a jave server running on both linux and Solaris environments.
On solaris,it consumes only 600-700MB whereas it goes upto 21G in Linux.
I am monitoring the memory consumption through top command.
Is this high memory consumption expected in Linux? (1 Reply)
Discussion started by: prasperl
1 Replies
9. Red Hat
Hi
the version is RedHat 6.2 (Oracle DB server)
I don't know why swap memory usage keeps increasing...
I used to check swap memory usage Free -m and another way.
total used free shared buffers cached
Mem: 32183 31861 322 ... (3 Replies)
Discussion started by: tom8254
3 Replies
10. UNIX for Advanced & Expert Users
Hi,
This morning there was an app that caused a sudden spike in I/O and memory usage in the server. We found the reason for the I/O, however the memory spike was something new, as it had never happened before.
I figured out what caused the memory spike, however, how do I investigate why... (6 Replies)
Discussion started by: anaigini45
6 Replies
LEARN ABOUT XFREE86
sysinfo
SYSINFO(2) Linux Programmer's Manual SYSINFO(2)
NAME
sysinfo - return system information
SYNOPSIS
#include <sys/sysinfo.h>
int sysinfo(struct sysinfo *info);
DESCRIPTION
sysinfo() returns certain statistics on memory and swap usage, as well as the load average.
Until Linux 2.3.16, sysinfo() returned information in the following structure:
struct sysinfo {
long uptime; /* Seconds since boot */
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
unsigned long totalram; /* Total usable main memory size */
unsigned long freeram; /* Available memory size */
unsigned long sharedram; /* Amount of shared memory */
unsigned long bufferram; /* Memory used by buffers */
unsigned long totalswap; /* Total swap space size */
unsigned long freeswap; /* Swap space still available */
unsigned short procs; /* Number of current processes */
char _f[22]; /* Pads structure to 64 bytes */
};
In the above structure, the sizes of the memory and swap fields are given in bytes.
Since Linux 2.3.23 (i386) and Linux 2.3.48 (all architectures) the structure is:
struct sysinfo {
long uptime; /* Seconds since boot */
unsigned long loads[3]; /* 1, 5, and 15 minute load averages */
unsigned long totalram; /* Total usable main memory size */
unsigned long freeram; /* Available memory size */
unsigned long sharedram; /* Amount of shared memory */
unsigned long bufferram; /* Memory used by buffers */
unsigned long totalswap; /* Total swap space size */
unsigned long freeswap; /* Swap space still available */
unsigned short procs; /* Number of current processes */
unsigned long totalhigh; /* Total high memory size */
unsigned long freehigh; /* Available high memory size */
unsigned int mem_unit; /* Memory unit size in bytes */
char _f[20-2*sizeof(long)-sizeof(int)];
/* Padding to 64 bytes */
};
In the above structure, sizes of the memory and swap fields are given as multiples of mem_unit bytes.
RETURN VALUE
On success, sysinfo() returns zero. On error, -1 is returned, and errno is set to indicate the cause of the error.
ERRORS
EFAULT info is not a valid address.
VERSIONS
sysinfo() first appeared in Linux 0.98.pl6.
CONFORMING TO
This function is Linux-specific, and should not be used in programs intended to be portable.
NOTES
All of the information provided by this system call is also available via /proc/meminfo and /proc/loadavg.
SEE ALSO
proc(5)
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 SYSINFO(2)