Visit Our UNIX and Linux User Community


output of vmstat


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users output of vmstat
# 1  
Old 09-11-2006
Error output of vmstat

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 like 6263.
this happens on the same system in 1 minute interval.
what is the relation between these two values?

r w u act free wire fault cow zero react pin pout in
1K 229 867K 960K 203K 364K 20K 187K 0 44K 0 5K 239K
1K 229 904K 922K 203K 62881 2819 26K 0 6263 0 3K 119K
# 2  
Old 09-22-2006
Quote:
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)
Page out is when the system dumps a page to disk that hasn't been accessed in the timeframe set up - meaning no one attempted to access that page (the data that was taken from disk and put into memory) AND someone has requested some other data to be read and the system needed to dump some of the data it had in memory for the new data being requested.

Page in is when someone DOES request the data that was accessed a while ago but had been paged out (the data was sent to disk). The system gets the data that was paged out (as long as it hasn't changed) and brings it back into memory. Having pagein at zero would be expected on a server.

Previous Thread | Next Thread
Test Your Knowledge in Computers #978
Difficulty: Easy
The Linux kernel development community uses Git to manage the kernel source code.
True or False?

10 More Discussions You Might Find Interesting

1. Solaris

Reason for abnormal value in vmstat output

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

2. Linux

Vmstat

I m checking idle time using vmstat, below are the results var=$(ssh wmtmgr@$hostname vmstat | tail -1 | awk '{print $15}') 89 and now im subtracting 89 with 100 & im getting expected results expr 100 - $var 11 Now How can I get the result 11 in one line code? (4 Replies)
Discussion started by: sam@sam
4 Replies

3. UNIX for Dummies Questions & Answers

Pls. help with vmstat output...

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)
Discussion started by: samnyc
1 Replies

4. Solaris

Different VMSTAT output on Linux and Solaris machines

Hi, I am porting a piece of code from Solaris to Linux. Code uses VMSTAT command. On Solaris machine VMSTAT output is following: uname -a: SunOS rgsm01 5.9 Generic_118558-03 sun4u sparc SUNW,Sun-Fire-V440 vmstat: kthr memory page disk faults cpu r b w swap free re mf pi po fr de sr m1 m2... (3 Replies)
Discussion started by: Basant Mishra
3 Replies

5. AIX

fr and sr (from vmstat output) values are very high

Hi AIX Expert, the fr (page freed/page replacement) and sr (pages scanned by page-replacement algorithm) values from the vmstat output (see below please) are very high. I usually see this high value during the oracle database backup. In addition, the page scan/page steal/ page faults values... (7 Replies)
Discussion started by: Beginer0705
7 Replies

6. Solaris

help with vmstat output

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)
Discussion started by: jamie_collins
1 Replies

7. AIX

vmstat incomprehensible output

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)
Discussion started by: Vit0_Corleone
3 Replies

8. UNIX for Advanced & Expert Users

vmstat's cpu stats on first line of output are always the same

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)
Discussion started by: neked
0 Replies

9. Shell Programming and Scripting

Capturing and sending of vmstat output everyday

I need to capture the vmstat output of a server every 5 minutes, in a text filename with the name in the format vmoutput. yesterday's date.txt. I need to get the vmstat o/p for the whole day with 5 minutes interval and send it (preferably ftp) to my local desktop folder. eg: vmstat 300... (1 Reply)
Discussion started by: yuvanash
1 Replies

10. UNIX for Dummies Questions & Answers

vmstat output with date & timestamp

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)
Discussion started by: luft
9 Replies

Featured Tech Videos