10 More Discussions You Might Find Interesting
1. AIX
Hi,
I can't seem to make sense of this. My wait time is showing really high but vmstat's and topas are showing normal usage.
ps aux
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 9961810 5680.7 0.0 448 384 - A Dec 16 6703072:12 wait
... (2 Replies)
Discussion started by: techy1
2 Replies
2. Programming
Hi All,
I have a program for class that needs to do the following:
1. Print the directory entries from the current directory using ncurses
2. Provide a prompt next to each directory entry and allow the user to enter commands that may or may not be about the file
3. Execute those commands in... (1 Reply)
Discussion started by: afulldevnull
1 Replies
3. Shell Programming and Scripting
Hi ,
I am trying to :wall: my head while scripting ..I am really new to this stuff , never did it before :( .
how to find cpu's system high time and user time high in a script??
thanks , help would be appreciated !
:) (9 Replies)
Discussion started by: sushwey
9 Replies
4. Shell Programming and Scripting
Hi,
I am facing a strange issue,
when i call a script from my while loop in background it doesnt go in background, despite the wait i put below the whil loop it goes forward even before the process put in background is completed.
cat abc.txt | while read -u4 line
do
#if line contains #... (2 Replies)
Discussion started by: mihirvora16
2 Replies
5. Red Hat
i have a Intel Quad Core Xeon X3440 (4 x 2.53GHz, 8MB Cache, Hyper Threaded) with 16gig and 1tb harddrive with a 1gb port and my apache is causing my cpu to go up to 100% on all four cores heres my http.config
<IfModule prefork.c>
StartServers 10
MinSpareServers 10
MaxSpareServers 15... (4 Replies)
Discussion started by: awww
4 Replies
6. Programming
Hello everybody.I want to make clear that i am not going to ask from anybody to build my asignement but i have a big problem. I can't seem to find anywhere ONE good example on C about what i am trying to do:wall:.I think it is simple. All i ask is one example, even a link is fine.
So, i want to... (1 Reply)
Discussion started by: Cuervo
1 Replies
7. Shell Programming and Scripting
I have a shell script that i want to run and then wait 30 minutes before running the rest of the script.
When I google the "wait" command, it seems to work for waiting for child processes or some pid to stop.
How do I wait for 30 minutes before continuing? (2 Replies)
Discussion started by: guessingo
2 Replies
8. Shell Programming and Scripting
Did not use 'wait' yet.
How I understand by now the wait works only for child processes, started background.
Is there any other way to watch completion of any, not related process (at least, a process, owned by the same user?)
I need to start a background process, witch will be waiting... (2 Replies)
Discussion started by: alex_5161
2 Replies
9. Shell Programming and Scripting
:cool:
I need to execute a shell script to do the following:
cat a file
run two back ground processes using the first two values from the file
wait till those background processes finish
run two more background processes using the next two values from the file
wait till those background... (1 Reply)
Discussion started by: halo98
1 Replies
10. 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
vmstat(1) General Commands Manual vmstat(1)
Name
vmstat - report virtual memory statistics
Syntax
vmstat [ interval [ count ] ]
vmstat -v [ interval [ count ] ]
vmstat -fKSsz
vmstat -Kks namelist [ corefile ]
Description
The command reports statistics on processes, virtual memory, disk, trap, and cpu activity.
If is specified without arguments, this command summarizes the virtual memory activity since the system was last booted. If the interval
argument is specified, then successive lines are summaries of activity over the last interval seconds. Because many statistics are sampled
in the system every five seconds, five is a good specification for interval; other statistics vary every second. If the count argument is
provided, the statistics are repeated count times.
When you run the format fields are as follows:
Procs: information about numbers of processes in various states.
r in run queue
b blocked for resources (i/o, paging, and so on.)
w runnable or short sleeper (< 20 seconds) but swapped
faults: trap/interrupt rate averages per second over the last 5 seconds.
in (non clock) device interrupts per second
sy system calls per second
cs cpu context switch rate (switches/second)
cpu: breakdown of percentage usage of cpu time
us user time for normal and low priority processes
sy system time
id cpu idle time
Memory: information about the use of virtual and real memory. Virtual pages are considered active if they belong to processes which are
running or have run in the last 20 seconds.
avm active virtual pages
fre size of the free list
Pages are reported in units of 1024 bytes.
If the number of pages exceeds 9999, it is shown in a scaled representation. The suffix k indicates multiplication by 1000 and the suffix
m indicates multiplication by 1000000. For example, the value 12345 appears as 12k.
page: information about page faults and paging activity. These are averaged every five seconds, and given in units per second. The size
of a unit is always 1024 bytes and is independent of the actual page size on a machine.
re page reclaims (simulating reference bits)
at pages attached (found in free list not swapdev or filesystem)
pi pages paged in
po pages paged out
fr pages freed per second
de anticipated short term memory shortfall
sr pages scanned by clock algorithm, per-second
disk: s0, s1 ...sn: Paging/swapping disk sector transfers per second (this field is system dependent). Typically paging is split across
several of the available drives. This will print for each paging/swapping device configured into the kernel.
Options
-f Provides reports on the number of forks and vforks since system startup and the number of pages of virtual memory involved in each
kind of fork.
-K Displays usage statistics of the kernel memory allocator.
-k Allows a dump to be interrogated to print the contents of the sum structure when specified with a namelist and corefile. This is
the default.
-S Replaces the page reclaim (re) and pages attached (at) fields with processes swapped in (si) and processes swapped out (so).
-s Prints the contents of the sum structure, giving the total number of several kinds of paging related events that have occurred since
boot.
-v Prints an expanded form of the virtual memory statistics.
-z Zeroes out the sum structure if the UID indicates root privilege.
Examples
The following command prints what the system is doing every five seconds:
vmstat 5
To find the status after a core dump use the following:
cd /usr/adm/crash
vmstat -k vmunix.? vmcore.?
Files
Kernel memory
System namelist
vmstat(1)