06-22-2012
What is "in use" on a AIX system depends on your definition of "in use". We have had this discussion quite a few times here, just have a search in this board with the keywords "memory used vmstat" and you will find a lot of threads.
The AIX kernel tries to make use of as much memory as is possible. If the memory is not used for programs it will automatically be used for I/O caching, network buffers, etc.. Once it *is* needed these buffers will be decreased in size again. This is steered via several options in the kernel tunables, namely the ones controlled by vmo.
Depending on your AIX version issue vmo -a with or without the "-F" option. Take a look at "maxperm%" and "minperm%". I bet maxperm% is set to 97 as you say 3% of the memory is free.
What exactly is your problem or what are you trying to achieve?
bakunin
PS: I'd be more concerned with the 6 processes in the blocked-queue (in the last line of vmstat output), as this means there are processes, which could run save for having to wait for some I/O.
10 More Discussions You Might Find Interesting
1. Solaris
Hi Friends,
I am trying to execute rsh commands from Solaris 10 system to AIX system.
When I give;
Solaris10# rsh <hostname> ls -l , it gives me an error
rshd : 0826-826 The host name for your address is not known
At the same time,
Solaris10# rsh <hostname> ---- gives me remote shell of... (25 Replies)
Discussion started by: jumadhiya
25 Replies
2. Shell Programming and Scripting
I have written a script that will calculate CPU usage and Memory usage of a particular process on AIX Unix. I know the PID and I am using the command --
# for CPU Usage
MSG_CPU_USG=`ps uax | grep ${PID} | awk {'print $3'}`
#for Memory Usage
MSG_MEM_USG=`ps uax | grep ${PID} | awk {'print... (0 Replies)
Discussion started by: asutoshch
0 Replies
3. AIX
Hi All,
How do you calculate the BOS filesystem on rootvg(/, /usr, /var, and /opt) and the BLV? So that I could calculate how much space I need on doing multibos.
Any idea will be appreciated, thanks. (0 Replies)
Discussion started by: itik
0 Replies
4. AIX
Is it necessary to put system into single user mode for applying aix 5.3 TL8 on a aix 5.3.5.0 system ?
Is the TL8 installation not totally safe ?
thank you. (6 Replies)
Discussion started by: astjen
6 Replies
5. Solaris
hi, I am using Solaris 10 and would like to know what;s the exact memory consumed by Oracle user id. I tried prstat -t and top but no luck. Am trying to monitor the the usage over a period of time. please could someone assist. (5 Replies)
Discussion started by: unahb1
5 Replies
6. Shell Programming and Scripting
QUESTION1:
How do you grep only an exact string. I am using Solaris10 and do not have any GNU products installed.
Contents of car.txt
CAR1_KEY0
CAR1_KEY1
CAR2_KEY0
CAR2_KEY1
CAR1_KEY10
CURRENT COMMAND LINE: WHERE VARIABLE CAR_NUMBER=1 AND KEY_NUMBER=1
grep... (1 Reply)
Discussion started by: thibodc
1 Replies
7. AIX
Could you please explain about calculate CPU utilization of aix server using lparstat command?
Here below i have provided example output from aix test server.
System configuration: type=Shared mode=Uncapped smt=On lcpu=4 mem=4096 psize=63 ent=0.50
%user %sys %wait %idle physc %entc ... (1 Reply)
Discussion started by: maruthu
1 Replies
8. AIX
I have a following requirement in production
system 1 : LINUX
User: abcd
system 2: AIX (it is hosting a production DB)
Requirement
user abcd from system 1 should have read access on archive log files created by DB on system 2. The log files are created with permissions 540 by user ora ,... (2 Replies)
Discussion started by: amitnm1106
2 Replies
9. Shell Programming and Scripting
Hi
I am trying to calculate memory used by Linux System
free -m
total used free shared buffers cached
Mem: 32109 31010 1099 0 3600 7287
-/+ buffers/cache: 20121 11987
Swap: 10239 1282 8957
Now according to my requirement Im calculating memory using below cmd
free -m | awk 'NR==3{printf... (2 Replies)
Discussion started by: sam@sam
2 Replies
10. UNIX for Beginners Questions & Answers
I am new to AIX but not new to unix.
I have an interview for an AIX systems admin position and I know they want someone who has knowledge of High Availability, Failover and LPARs
From my research so far, It appear powerha is used to setup high availability and failover on Power systems but is... (2 Replies)
Discussion started by: mathisecure
2 Replies
LEARN ABOUT REDHAT
vmstat
VMSTAT(8) Linux Administrator's Manual VMSTAT(8)
NAME
vmstat - Report virtual memory statistics
SYNOPSIS
vmstat [-n] [delay [ count]]
vmstat[-V]
DESCRIPTION
vmstat reports information about processes, memory, paging, block IO, traps, 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 -n switch causes the header to be displayed only once rather than periodically.
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 -V switch results in displaying version information.
FIELD DESCRIPTIONS
Procs
r: The number of processes waiting for run time.
b: The number of processes in uninterruptable sleep.
w: The number of processes swapped out but otherwise runnable. This
field is calculated, but Linux never desperation swaps.
Memory
swpd: the amount of virtual memory used (kB).
free: the amount of idle memory (kB).
buff: the amount of memory used as buffers (kB).
Swap
si: Amount of memory swapped in from disk (kB/s).
so: Amount of memory swapped to disk (kB/s).
IO
bi: Blocks sent to a block device (blocks/s).
bo: Blocks received from 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: user time
sy: system time
id: idle time
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 1k, except for CD-ROM blocks which are 2k.
FILES
/proc/meminfo
/proc/stat
/proc/*/stat
SEE ALSO
ps(1), top(1), free(1)
BUGS
Does not tabulate the block io per device or count the number of system calls.
AUTHOR
Written by Henry Ware <al172@yfn.ysu.edu>.
Throatwobbler Ginkgo Labs 27 July 1994 VMSTAT(8)