I would definitely try to trace the rest of the processes one by one (not exactly, here I'm tracing the mysqld process and follow the forks).
Something like this:
Hi All,
I am working on a Solaris machine. When i use a particular software to generate some files, the log shows around 0 to 3 secs for generating each file. But the same when i see on the disk it shows double the time difference between two file generation.
For example if file A takes 0 secs... (7 Replies)
Dear All,
We are using AIX 5.2 with IBM pseries servers.
I want to check disk io for a running process.
Please if anybody can help me.
Thanks.
Aqeel Anwar (1 Reply)
Hello ,
Well I have some /tmp files which are growing very quickly..Can anyone suggest me a way to find which process is logging into this file :confused: ?
Thanks very much in Advance!!
Mohammed (2 Replies)
Hi
We are running an IBM P570 with AIX and Unidata.
The disk monitor in nmon is showing that one of our logical volumes is hitting 100% most of the time, and that 98% of it is write.
I am trying to identify the top processes in terms of disk IO, obviously particularly write so that we... (4 Replies)
Hi,
The OS is SuSE Enterprise 11 and the system is HP WS460c G6 Blade with hardware disk array RAID 1 mirror. One disk was just replaced and the disk mirroring process is on its way. My question is how to follow up / monitor the disk mirroring process? I know hpacucli can do the job, but there... (0 Replies)
I have multiple input files that I want to manipulate using a shell script. The files are called 250.1 through 250.1000 but I only want the script to manipulate 250.300 through 250.1000. Before I was using the following script to manipulate the text files:
for i in 250.*; do
|| awk... (4 Replies)
Hi,
I am using iostat and /proc/<pid>/status to determine the disk usage per process. I have a question regarding buffer cache. When I am reading a 10MB file, the counters I get show that <5MB of the file is read. Do the counters in iostat and /proc/<pid> reflect the amount of data that is... (2 Replies)
In Our Production server I/O was very high, I Recived mail that Disk I/O was high, is it possible how to find which process Used this much I/O ?
Iam Using Ubuntu server 12.04.
Linux 3.9.3-x86_64-server33 (Li473-1200) 07/23/2014 _x86_64_ (8 CPU)
12:05:01 AM DEV ... (5 Replies)
Hello!
Need help to write a Linux script that can be run from windows using command/Cygwin/any other way. I am new to scripting, actually i am trying to automate server health check like free disk space, memory along with few services status, if any services is not running then start services ,... (7 Replies)
Discussion started by: Sayed Ibrahim
7 Replies
LEARN ABOUT BSD
iostat
IOSTAT(1) General Commands Manual IOSTAT(1)NAME
iostat - report I/O statistics
SYNOPSIS
iostat [ drives ] [ interval [ count ] ]
DESCRIPTION
Iostat iteratively reports the number of characters read and written to terminals per second, and, for each disk, the number of transfers
per second, kilobytes transferred per second, and the milliseconds per average seek. It also gives the percentage of time the system has
spent in user mode, in user mode running low priority (niced) processes, in system mode, and idling.
To compute this information, for each disk, seeks and data transfer completions and number of words transferred are counted; for terminals
collectively, the number of input and output characters are counted. Also, each sixtieth of a second, the state of each disk is examined
and a tally is made if the disk is active. From these numbers and given the transfer rates of the devices it is possible to determine
average seek times for each device.
The optional interval argument causes iostat to report once each interval seconds. The first report is for all time since a reboot and
each subsequent report is for the last interval only.
The optional count argument restricts the number of reports.
If more than 4 disk drives are configured in the system, iostat displays only the first 4 drives, with priority given to Massbus disk
drives (i.e. if both Unibus and Massbus drives are present and the total number of drives exceeds 4, then some number of Unibus drives will
not be displayed in favor of the Massbus drives). To force iostat to display specific drives, their names may be supplied on the command
line.
FILES
/dev/kmem
/vmunix
SEE ALSO vmstat(1)4th Berkeley Distribution April 29, 1985 IOSTAT(1)