Thanks for your command Sysgate it seems I get a lot of old processes that are hanging around such as
They don't seem to have been processes that would have kicked in and changed the cpu Idle of the vmstat report. Am I missing something?
When I run the top command, it shows 1 process as being Stopped. This is not a zombie, but simply a stopped process. Unfortunately, I can't figure out how to tell which process this is, nor why it is in a stopped state? Any way of finding this out? (7 Replies)
I am trying to write a script to make a ssh tunnel persist. I am writing it to check the existence of the tunnel on port 3307 and if it is not found start it:
#!/usr/local/bin/bash
# ~/my_tunnel.sh
tunnel_up=`ps ax|grep 3307`
if ; then
ssh -fNg -C -L 3307:127.0.0.1:3306... (4 Replies)
Hi there,
First, must said sorry for my bad english : hope to be understood.
I work on HP-UX and need to work with specific processus.
In order to migrate to other system with the less work as possible (portability) i must write a script that verify if a processus B is a son of a processus A.... (0 Replies)
I have some Solaris processes that run weeks at a time that create rather large log files that I would like to archive/compress daily. Instead of stopping the process, what can be done so that the log file is backed up and shrunk, but the process can still log to the open file handle without major... (7 Replies)
Is it possible to display active processes' Year,Month,Day,Hour,Minute,Second info of process start time ? Preferbly in the format "YYYY/MM/DD HH:MM:SS" ?
I tried to do this with the ps command but it only gets the time or date.
Any help will be greatly appreciated.
Cheers
Steve (4 Replies)
Hi,
I am using net::ftp for transferring files now i am trying in the same Linux server as a result ftp is very fast but if the server is other location (remote) then the file transferred will be time consuming.
So i want try putting FTP part as a background process. I am unaware how to do... (5 Replies)
Hi,
I am new in system administration. I observe that some nodes in our cluster
are not considered as active by showq:
22 active jobs 217 of 257 processors in use by local jobs (84.44%)
15 of 17 nodes active (88.24%)
but then I try to log into... (1 Reply)
Hi,
I have a script which triggers an infinite loop.
#!bin/bash
trig=`ls /home/trig.tch |wc -l`
function callj {
some commands...
}
while
do
callj &
done
The number of process after doing a ps -ef |grep Mon.sh returns
processes even after the script is killed by deleting the... (4 Replies)
We have written a bare bones scheduling app using bash scripts. The input to the scheduler is from a mainframe scheduling tool, and the scripts exit code is returned to the MF. The problem is that every now and again I have a script that does not complete and this is left in my Q. I am in the... (1 Reply)
Hi,
How to find which processes are blocked?
b column in vmstat shows higher values some times(approximately 30 min)
bash-3.2# vmstat 1 10
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr m1 m1 m1 m2 in sy cs us... (3 Replies)
Discussion started by: sureshsun
3 Replies
LEARN ABOUT LINUX
vmstat
VMSTAT(8) Linux Administrator's Manual VMSTAT(8)NAME
vmstat - Report virtual memory statistics
SYNOPSIS
vmstat [-a] [-n] [delay [ count]]
vmstat [-f] [-s] [-m]
vmstat [-S unit]
vmstat [-d]
vmstat [-D]
vmstat [-p disk partition]
vmstat [-V]
DESCRIPTION
vmstat reports information about processes, memory, paging, block IO, traps, disks and cpu activity.
The first report produced gives averages since the last reboot. Additional reports give information on a sampling period of length delay.
The process and memory reports are instantaneous in either case.
Options
The -a switch displays active/inactive memory, given a 2.5.41 kernel or better.
The -f switch displays the number of forks since boot. This includes the fork, vfork, and clone system calls, and is equivalent to the
total number of tasks created. Each process is represented by one or more tasks, depending on thread usage. This display does not repeat.
The -m displays slabinfo.
The -n switch causes the header to be displayed only once rather than periodically.
The -s switch displays a table of various event counters and memory statistics. This display does not repeat.
delay is the delay between updates in seconds. If no delay is specified, only one report is printed with the average values since boot.
count is the number of updates. If no count is specified and delay is defined, count defaults to infinity.
The -d reports disk statistics (2.5.70 or above required)
The -D reports some summary statistics about disk activity.
The -p followed by some partition name for detailed statistics (2.5.70 or above required)
The -S followed by k or K or m or M switches changes the units of ouput from bytes to outputs between 1000, 1024, 1000000, or 1048576
bytes. Note this does not change the swap (si/so) or block (bi/bo) fields.
The -V switch results in displaying version information.
FIELD DESCRIPTION FOR VM MODE
Procs
r: The number of processes waiting for run time.
b: The number of processes in uninterruptible sleep.
Memory
swpd: the amount of virtual memory used.
free: the amount of idle memory.
buff: the amount of memory used as buffers.
cache: the amount of memory used as cache.
inact: the amount of inactive memory. (-a option)
active: the amount of active memory. (-a option)
Swap
si: Amount of memory swapped in from disk (/s).
so: Amount of memory swapped to disk (/s).
IO
bi: Blocks received from a block device (blocks/s).
bo: Blocks sent to a block device (blocks/s).
System
in: The number of interrupts per second, including the clock.
cs: The number of context switches per second.
CPU
These are percentages of total CPU time.
us: Time spent running non-kernel code. (user time, including nice time)
sy: Time spent running kernel code. (system time)
id: Time spent idle. Prior to Linux 2.5.41, this includes IO-wait time.
wa: Time spent waiting for IO. Prior to Linux 2.5.41, included in idle.
st: Time stolen from a virtual machine. Prior to Linux 2.6.11, unknown.
FIELD DESCRIPTION FOR DISK MODE
Reads
total: Total reads completed successfully
merged: grouped reads (resulting in one I/O)
sectors: Sectors read successfully
ms: milliseconds spent reading
Writes
total: Total writes completed successfully
merged: grouped writes (resulting in one I/O)
sectors: Sectors written successfully
ms: milliseconds spent writing
IO
cur: I/O in progress
s: seconds spent for I/O
FIELD DESCRIPTION FOR DISK PARTITION MODE
reads: Total number of reads issued to this partition
read sectors: Total read sectors for partition
writes : Total number of writes issued to this partition
requested writes: Total number of write requests made for partition
FIELD DESCRIPTION FOR SLAB MODE
cache: Cache name
num: Number of currently active objects
total: Total number of available objects
size: Size of each object
pages: Number of pages with at least one active object
NOTES
vmstat does not require special permissions.
These reports are intended to help identify system bottlenecks. Linux vmstat does not count itself as a running process.
All linux blocks are currently 1024 bytes. Old kernels may report blocks as 512 bytes, 2048 bytes, or 4096 bytes.
Since procps 3.1.9, vmstat lets you choose units (k, K, m, M) default is K (1024 bytes) in the default mode
vmstat uses slabinfo 1.1 FIXME
FILES
/proc/meminfo
/proc/stat
/proc/*/stat
SEE ALSO iostat(1), sar(1), mpstat(1), ps(1), top(1), free(1)BUGS
Does not tabulate the block io per device or count the number of system calls.
AUTHORS
Written by Henry Ware <al172@yfn.ysu.edu>.
Fabian Frederick <ffrederick@users.sourceforge.net> (diskstat, slab, partitions...)
Throatwobbler Ginkgo Labs 2009 Jan 9 VMSTAT(8)