Sponsored Content
Top Forums UNIX for Advanced & Expert Users identify the unix process performing high disk i/o reads and writes Post 302276693 by methyl on Wednesday 14th of January 2009 11:32:10 AM
Old 01-14-2009
If you have unix Process Accounting running there is a whole suite of
supplied scripts to record data and find historic details of processes.
For an overview see:

man acct
man acctcms
man acctcom

Setting up unix Process Accounting from scratch is not trivial. On a busy
system it can need very large amounts of disc space and become a significant
load on your system itself.

If you are running a database engine such as Oracle, I/O statistics can
usually be obtained from the database engine.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sh script that reads/writes based upon contents of a file

Hi everyone, Ive got a quick question about the feasibility and any suggestions for a shell script. I can use sh or ksh, doesnt matter. Basically, Ive got an output file from a db2 command that looks like so: SCHEMA NAME CARD LEAF ELEAF LVLS ISIZE NDEL KEYS F4 F5 ... (3 Replies)
Discussion started by: rdudejr
3 Replies

2. Shell Programming and Scripting

identify the unix processes performing high disk i/o reads and writes

I would like to write shell/perl script which identifies the top unix processes that are performing high disk I/O's or/and writes If any one knows the solution please help me? -Swamy (0 Replies)
Discussion started by: avsswamy
0 Replies

3. Shell Programming and Scripting

Unix Script to find and kill a process with high memory utilization

Hi Unix Gurus i am somewhat new to unix scripting so need your help to create a script as below. # This script would find the process consuming memory beyond a certain #limit. if the meemory consumption is more than 100% for a period of 1 # minute for the specific process. the script would... (0 Replies)
Discussion started by: robinforlinux
0 Replies

4. Filesystems, Disks and Memory

Does vmstat -d give a count of actual physical writes/reads done to/from hard disk?

Hi, I am trying to find the reliability of 'vmstat -d' for showing the actual physical writes on sectors on hard disk. Can anyone please tell me if the numbers in the "sectors" field under "read" or "write" headers show a count of the actual write commands sent to disk from the low level... (2 Replies)
Discussion started by: jake24
2 Replies

5. Filesystems, Disks and Memory

Life span of HDD - maximum reads/writes etc

Hi All I was wondering how the copying of vast amounts of data affected the overall lifespan of an HDD. In my example, I'm copying approx 120GB (250,000) of files, once per hour from disk to another. Is this likely to have a detrimental effect on the disk in terms of reads/writes etc? ... (2 Replies)
Discussion started by: huskie69
2 Replies

6. Shell Programming and Scripting

Identify high values "ÿ" in a text file using Unix command

I have high values (such as ÿÿÿÿ) in a text file contained in an Unix AIX server. I need to identify all the records which are having these high values and also get the position/column number in the record structure if possible. Is there any Unix command by which this can be done to : 1.... (5 Replies)
Discussion started by: devina
5 Replies

7. UNIX for Dummies Questions & Answers

Difference between buffered disk reads and cached reads?

I was analyzing the Disk read using hdparm utility. This is what i got as a result. # hdparm -t /dev/sda /dev/sda: Timing buffered disk reads: 108 MB in 3.04 seconds = 35.51 MB/sec # hdparm -T /dev/sda /dev/sda: Timing cached reads: 3496 MB in 1.99 seconds = 1756.56 MB/sec... (1 Reply)
Discussion started by: pinga123
1 Replies

8. Shell Programming and Scripting

Help with script that reads and writes java console Minecraft

Hi I am looking for an easy way to lock game mode (0) for everyone included op on a Minecraft server. It can be a script that every time a player changes game to 1 the script changes back to 0. What the player writes is visible in the java console. I am not good at script programming and my... (0 Replies)
Discussion started by: MyMorris
0 Replies

9. Linux

Dealing with a really high amount of reads merged

I'm trying to performance tune the I/O of my web server, which is at 41.1% reads merged (If my math is correct), which seems a tad high to just be going along with the defaults. Will modifying read_ahead_kb affect the value of "reads merged" in diskstats? If not, what's a good way of tracking... (2 Replies)
Discussion started by: thmnetwork
2 Replies

10. Emergency UNIX and Linux Support

How to find which process using, while getting High Disk I/O?

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)
Discussion started by: babinlonston
5 Replies
acct(5) 							File Formats Manual							   acct(5)

Name
       acct - execution accounting file

Syntax
       #include <sys/acct.h>

Description
       The  system  call makes entries in an accounting file for each process that terminates.	The accounting file is a sequence of entries whose
       layout, as defined by the include file, is:
       typedef u_short comp_t
       struct  acct
       {
	       char    ac_comm[10];   /* Accounting command name */
	       comp_t  ac_utime;      /* Accounting user time */
	       comp_t  ac_stime;      /* Accounting system time */
	       comp_t  ac_etime;      /* Accounting elapsed time */
	       time_t  ac_btime;      /* Beginning time */
	       short   ac_uid;	      /* Accounting user ID */
	       short   ac_gid;	      /* Accounting group ID */
	       short   ac_mem;	      /* average memory usage */
	       comp_t  ac_io;	      /* number of disk IO blocks */
	       dev_t   ac_tty;	      /* control typewriter */
	       char    ac_flag;       /* Accounting flag */
       };

       #define AFORK   0001    /* has executed fork, but no exec */
       #define ASU     0002    /* used super-user privileges */
       #define ACOMPAT 0004    /* used compatibility mode */
       #define ACORE   0010    /* dumped core */
       #define AXSIG   0020    /* killed by a signal */
       #define AHZ     64      /* the accuracy of data is 1/AHZ */

       #ifdef KERNEL
       struct  acct    acctbuf;
       struct  gnode   *acctp;
       #endif
       If the process does an the first 10 characters of the file name appear in ac_comm.  The accounting flag contains  bits  indicating  whether
       was ever accomplished and whether the process ever had superuser privileges.

See Also
       acct(2), execve(2), sa(8)

								       RISC								   acct(5)
All times are GMT -4. The time now is 07:30 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy