Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Why using "%" of Paging size increases & how to decrease this percentage?
Operating Systems AIX Why using "%" of Paging size increases & how to decrease this percentage? Post 302430252 by bakunin on Thursday 17th of June 2010 03:07:18 AM
Old 06-17-2010
ross.mather is of course correct. The bottom line of all this is:

Watch the swap consumption over time. If it is rather static you simply have not enough physical memory and your system needs virtual memory (aka swapspace) to compensate for this.

If the swap consumption increases over time one (or several) of your running processes are likely to have a memory leak. That is: they allocate memory without giving it back once they don't use it any more. Giving the system more memory (or swapspace or both) will only increase the time until which the memory is exhausted.

To find out which process(es) use how much memory do the following:

Code:
ps -Alo vsz,pcpu,pid,args | sort -rn

This lists all processes, sorted by their allocated memory, their CPU comsumption, PID and commandline used to invoke them. Repeat this in intervals and compare the output to find the memory hogs.

I hope this helps.

bakunin
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

"sed" to check file size & echo " " to destination file

Hi, I've modified the syslogd source to include a thread that will keep track of a timer(or a timer thread). My intention is to check the file size of /var/log/messages in every one minute & if the size is more than 128KB, do a echo " " > /var/log/messages, so that the file size will be set... (7 Replies)
Discussion started by: jockey007
7 Replies

2. UNIX for Dummies Questions & Answers

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

3. UNIX for Advanced & Expert Users

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

4. Shell Programming and Scripting

Command Character size limit in the "sh" and "bourne" shell

Hi!!.. I would like to know what is maximum character size for a command in the "sh" or "bourne" shell? Thanks in advance.. Roshan. (1 Reply)
Discussion started by: Roshan1286
1 Replies

5. Shell Programming and Scripting

Delete files older than "x" if directory size is greater than "y"

I wrote a script to delete files which are older than "x" days, if the size of the directory is greater than "y" #!/bin/bash du -hs $1 while read SIZE ENTRY do if ; then find $1 -mtime +$2 -exec rm -f {} \; echo "Files older than $2 days deleted" else echo "free Space available"... (4 Replies)
Discussion started by: JamesCarter
4 Replies

6. Red Hat

files having Script which works behind "who" & "w" commands

Dear All, plz print the path of files which have the script of "who" & "w" commands. thnx in advance. (6 Replies)
Discussion started by: saqlain.bashir
6 Replies

7. UNIX for Dummies Questions & Answers

"Universal" sar option to check for paging issues?

Hi, Can anyone please advise a universal command option for using sar to check for paging/memory issues. For Linux, I used sar -B and check on the majflt/s column and a high number is supposed to indicate paging issues, is that correct? Unfortunately, on a Solaris server, sar -B does not... (1 Reply)
Discussion started by: newbie_01
1 Replies

8. Shell Programming and Scripting

finding the strings beween 2 characters "/" & "/" in .txt file

Hi all. I have a .txt file that I need to sort it My file is like: 1- 88 chain0 MASTER (FF-TE) FFFF 1962510 /TCK T FD2TQHVTT1 /jtagc/jtag_instreg/updateinstr_reg_1 dff1 (TI,SO) 2- ... (10 Replies)
Discussion started by: Behrouzx77
10 Replies

9. Web Development

How would I mod_rewrite "/~a1Pha" and "/=a1Pha" to "/paste/a1Pha.htm"? (internally & externally)

Basically I want to shorten URLs on my html pasting site (pasteht.ml), by using "/~a1Pha" instead of "/paste/a1Pha". The ID is 5 numbers and letters, both cases. For example: /~idnum serves /paste/idnum.htm /=idnum serves /paste/idnum.htm /paste/idnum redirects to /~idnum (to update any old... (0 Replies)
Discussion started by: phillips1012
0 Replies

10. AIX

Apache 2.4 directory cannot display "Last modified" "Size" "Description"

Hi 2 all, i have had AIX 7.2 :/# /usr/IBMAHS/bin/apachectl -v Server version: Apache/2.4.12 (Unix) Server built: May 25 2015 04:58:27 :/#:/# /usr/IBMAHS/bin/apachectl -M Loaded Modules: core_module (static) so_module (static) http_module (static) mpm_worker_module (static) ... (3 Replies)
Discussion started by: penchev
3 Replies

LEARN ABOUT HPUX

allocate_fs_swapmap

allocate_fs_swapmap(5)						File Formats Manual					    allocate_fs_swapmap(5)

NAME

       allocate_fs_swapmap - determines when swapmap structures are allocated for filesystem swap

VALUES

   Failsafe
   Default
   Allowed values
       or

DESCRIPTION

       The tunable is used to determine whether to allocate all needed filesystem swap structures during the initialization of the filesystem swap
       device or wait until they are needed.  Pre-allocation of all filesystem swap structures upon initialization saves time during  later  usage
       of the filesystem swap, and prevents later allocation failure due to physical memory contention.

       Dynamic allocation decreases the memory footprint of the filesystem swap system.

   Who is Expected to Change This Tunable?
       Anyone.

   Restrictions on Changing
       Changes to this tunable take effect at the next reboot.

   When Should the Value of This Tunable Be Raised?
       Systems under heavy memory load may not be able to acquire enough memory to hold the swap mapping structures for an addition of file system
       swap.  These calls to add swap would fail with the error though presumably they would be retried.  Frequent failure  on	file  system  swap
       addition with would merit enabling this tunable.

   What Are the Side Effects of Raising the Value?
       All  the  swap  map structures for each file system swap device would be preallocated during swap initialization at kernel boot, increasing
       the memory footprint of the kernel.  The amount of increase depends on the number and size of file system swap devices.

   When Should the Value of This Tunable Be Lowered?
       Systems with limited memory available to the kernel that also have limited use of file system swap devices should disable this  tunable	to
       decrease kernel memory usage.

   What Are the Side Effects of Lowering the Value?
       File system swap additions may fail with when memory contention is high.

   What Other Tunable Values Should Be Changed at the Same Time?
       None.

WARNINGS

       All  HP-UX kernel tunable parameters are release specific.  This parameter may be removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by HP.

							     Tunable Kernel Parameters					    allocate_fs_swapmap(5)
All times are GMT -4. The time now is 02:15 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy