It is as ross.mather says - not sure from your answer if you understood it from his explanation or not.
To keep it short - don't worry, it is normal to have low free memory on AIX. Did you experience any slowdowns or are you just trying to get a clue about the retrieved data? There is much more to obeye than just the output you posted; i.e. this output alone is not helpfull.
If you are unsure if your system is ok, post the following using code tags please (taken at peak times), so we can get a first glimpse at it:
If all that performance stuff is too much to read up or to understand without explanations etc. (no offence) there is a tool that is very good at analyzing performance bottle necks and it also suggests changes to improve on it:
It describes in well readable text after an analyzing run, what it found and what to do. You can get a shareware version to test it. I don't work for them but we tried it out and it is really good.
Last edited by zaxxon; 02-26-2010 at 02:04 PM..
Reason: typos
good morning
what is the better solution to examen a P570 ?
because i use topas and nmon, and the results are totally different !!!
with nmon, i have 80% free cpu, and with nmon, i have 90% of used cpu !!!!!!
i take a shot with an intervall of 10s during 10 mn.
thank you (0 Replies)
Anyone ever experienced a core dump when running NMON. I am running AIX 5.3 on an 8 CPU LPAR (P570). This has only recently started to happen. (3 Replies)
Can any one help where i can find articals about nomn
I need to know how to read this tools
┌─CPU-Utilisation-Small-View───────────────────────────────────────────────────┐
│ 0----------25-----------50----------75----------100│
│CPU User% Sys% Wait% Idle%| ... (3 Replies)
HI Im new on this world.
Im working with nmon and I understand that this tool generates a files that later with excel I can see the graphcial of my server.
The problem is that this process is execute manualy and I need to meake automatic.
How can I do That.
Sorry for my english!! :o (3 Replies)
We have processes that run on our AIX box that sometimes run away and end up consuming 99% of the CPU. I'd like to create a script that would attempt to monitor when this happens and send an email alert with the PID and CPU %. Has anyone done such a thing? I know that you can run the nmon output to... (6 Replies)
Hi guys,
as per subject i am setting up NMON for the above OS but it is 64-bit Linux.
I downloaded the 32-bit NMON for RHEL45 as it is the only one available for RHEL45.
However, I ran into problem with the binary file.
# ./nmon_x86_rhel45
./nmon_x86_rhel45: error while loading shared... (13 Replies)
Hi All,
First of all, I am a DBA and not an AIX admin. I am new at using this NMON tool.
In interactive mode, I can start nmon, push 't' to have the list of process with their statistic (ie cpu% etc.).
I would like to know if there is a way to redirect that screen output into a log... (1 Reply)
Hi, my name is Steve Ngai from Malaysia. This is my first post. Hope to learn more about Unix from this forum.
My first question is can nmon be customized? When I run nmon, I need to manually type c to see CPU usage, then m for memory usage. Can I pass it some nmon option to automatically see... (2 Replies)
Dear All,
I am an performance tester. Now i am working in project where we are using linux 2.6.32. Now I got an oppurtunity to learn the monitoring the server. As part of this task i need to do analysis of the Nmon report. I was completely blank in this.
So please suggest me how to start... (0 Replies)
Discussion started by: iamsengu
0 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)