10 More Discussions You Might Find Interesting
1. AIX
I am new to AIX, I have few AIX 5.3 servers and I could see there are significant difference in paging space utilization on servers even though they are running same applications
below server is working fine which shows 2-5 % paging usage throuh out the day
cpu_scale_memp = 8... (12 Replies)
Discussion started by: bibish
12 Replies
2. Red Hat
Hello, I am using Linux os.
$ df -k /dev/shm
Filesystem 1K-blocks Used Available Use% Mounted on
tmpfs 2023256 1065000 958256 53% /dev/shm
$
Based on my google this, it is shared memory. What is this shared memory and where exactly it is used? Can you... (5 Replies)
Discussion started by: govindts
5 Replies
3. AIX
I just want to inquire on one of our DB Servers. Currently, we are running on 26GB of memory and 6 CPUs. Though our memory is 70-80 utilized, I can see some paging of around 8-10%. Is there any effective way we can lessen/eliminate paging?
Here is our current VMO Settings:
vmo:
... (1 Reply)
Discussion started by: depam
1 Replies
4. AIX
Hi Guys,
I hope this is an easy question: I need some kind of script or an idea how I can convince syslog to send an email to root or someone else once cpu usage exceeds 95% or the memory consumption (maybe via AVM value times 4k) exceeds 85% of my real memory on any of my 700 lpars. We're... (4 Replies)
Discussion started by: zxmaus
4 Replies
5. Linux
Hi All,
We are using the linux servers and need to track the memory utilization of the box. Could anyone advice how the same can be achived.
:) (1 Reply)
Discussion started by: haitorajesh
1 Replies
6. Red Hat
how to list the orphaned shared memory?
how to kill them so that shared mem is free again.
thanks (9 Replies)
Discussion started by: melanie_pfefer
9 Replies
7. HP-UX
Gurus,
Having a GS1280 box with OSF1 v5.1 installed (16 processors), the run queue value from the vmstat command reports a very high value (about 25 to 30). Does this reflect a CPU bound system. Note that the average CPU utilization is about 60 % which means that the CPU is not that loaded.
Can... (0 Replies)
Discussion started by: Negm
0 Replies
8. UNIX for Advanced & Expert Users
can anybody explain me the concepts
virtual memory mangement, swapping and paging?
although i roughly know what they are , i need
more solid distinction between them, and also i want to figure out
the relations between them?
do you have any well-defined definitons for this concepts? (2 Replies)
Discussion started by: gfhgfnhhn
2 Replies
9. UNIX for Advanced & Expert Users
Hi,
I having problem with my linux machine
it have 6Gb physical memory and somehow it always almost coming to the bottom neck and than it start writing to the swap memory
you can see that there is more than 4G in cahce, is there any way to clean the cache or to limit it to 2Gb?
host1... (6 Replies)
Discussion started by: Igal Malka
6 Replies
10. Red Hat
What's the best way to find out how much memory is being used/available? I tried using free, but I didn't quite understand the output. Can someone explain it?
$ free
total used free shared buffers cached
Mem: 16304536 16256376 48160 0 ... (6 Replies)
Discussion started by: junkmail426
6 Replies
ALARM(3) BSD Library Functions Manual ALARM(3)
NAME
alarm -- set signal timer alarm
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
unsigned int
alarm(unsigned int seconds);
DESCRIPTION
This interface is made obsolete by setitimer(2).
The alarm() function sets a timer to deliver the signal SIGALRM to the calling process after the specified number of seconds. If an alarm
has already been set with alarm() but has not been delivered, another call to alarm() will supersede the prior call. The request alarm(0)
voids the current alarm and the signal SIGALRM will not be delivered.
Due to setitimer(2) restriction the maximum number of seconds allowed is 100000000.
RETURN VALUES
The return value of alarm() is the amount of time left on the timer from a previous call to alarm(). If no alarm is currently set, the
return value is 0.
SEE ALSO
setitimer(2), sigaction(2), sigsuspend(2), signal(3), sleep(3), ualarm(3), usleep(3)
HISTORY
An alarm() function appeared in Version 7 AT&T UNIX.
BSD
April 19, 1994 BSD