How do you reset the values that vmstat displays?
Vmstat displays a running average from the last the system was restarted on the first line, how do you reset these values without restarting the system? (Solaris 8) (3 Replies)
i have 2 question about vmstat
1)
pin (pagein) output of vmstat is always zero for our system
what is the meaning of this?
(pout significantly changes depending on the running processes)
2)
sometimes react output
of vmstat is given in K like 44K
sometimes it is given without any unit... (1 Reply)
Hello all
This is a sample vmstat output ...
$ vmstat 2 2
kthr memory page disk faults cpu
r b w swap free re mf pi po fr de sr hx hx hx hx in sy cs us sy id
1 0 0 23105784 7810488 323 767 1742 5 5 0 0 0 0 0 0 683 780 457 43 ... (9 Replies)
Hello,
I'm seeing this problem with vmstat, where the first line of output always has the same CPU statistics. For example:
neked@nekedmachine:~$ date && vmstat
Fri Jul 24 06:57:08 EDT 2009
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b swpd ... (0 Replies)
Hello everybody, When i run Nmon the output is really incomprehensible
vmstat 5
System configuration: lcpu=16 mem=24576MB ent=4.00
kthr memory page faults cpu
----- ----------- ------------------------ ------------ -----------------------... (3 Replies)
Hi all.
I need some assistance with my vmstat output.
We have several oracle db's running on our solaris machine:
SunOS rcworaprd 5.9 Generic_112233-07 sun4u sparc SUNW,Sun-Fire-480R
Recently I bumped up our main Oracle database to use 6 GB instead of 4 GB as vmstat output was showing... (1 Reply)
Hi all,
Recently I facing problem with my AIX server. we experience slowness on performance. there are some application installed in this server such as : Oracle 10g database, control-m client agent, and some monitoring tools.
when we're facing the problem we're noticing that vmstat value a... (7 Replies)
Hi,
Users are reporting performance issue on my Sun Solaris 10 server. I am on the server. I don't see a issue or I might be looking at the wrong thing. Please help.
I don't see anything on sar. it's all zero on that. Not sure why users are reporting high CPU and unresponsive at times. ... (1 Reply)
Hi,
Recently from the vmstat output in the image attached, the first line of the cpu idle column shows a value of 15. Although the subsequent values show higher than 90, is there a reason why the first value is so low?
Is this a problem?
Thanks. (4 Replies)
Discussion started by: anaigini45
4 Replies
LEARN ABOUT ULTRIX
vmstat
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)
02-04-2011
