SWAP command not working on Linux machine Post: 302832179

10 More Discussions You Might Find Interesting

1. Solaris

formula to get the swap space on a machine

Hello there are different opinions on how to get the swap space on Solaris. some say: swap -s and the space= used + available others say swap -l (donno how they get the swap size) other say 'top' command others say using format command (in print sub-command) Could you please advise on...

2. Red Hat

Command to set locale for my linux machine

Hi, I need to set a locale to my linux machine which has redhat enterprise linux 4 how should I do that. And also when i did locale -a, I have got three versions for each locale type with different .extensions like utf8,iso88951 and soon which file should I use for setting locale. ...

3. UNIX for Dummies Questions & Answers

Link type between working machine and server machine

There are two servers where my machine is connected. Is there any type of link formed between my machine and server machine?

4. Programming

cos() command not working in Linux

Hi, I have written a c program to find cos() of a value , its not working, I am getting value of "val " as 0000. #include<stdio.h> #include<math.h> main() { float val; val = cosf( 1.570796); printf("\nval = %f",val); }

5. HP-UX

Mirrored root and swap HP9000 machine

How do I check if the root and swap are mirrored on my HP9000 machine? Thank you, N.

6. UNIX for Dummies Questions & Answers

Trying to get mail working on a Linux machine

I tried using the mail command on one of our Linux machines to send email, and it works fine. I tried using the same command on another one of our Linux machines, and it didn't work (no error message was returned either). The machine that works has the following version information:...

7. Shell Programming and Scripting

sed command working different in linux environment.

Hi I tried running the code scrname=`whence $0 | sed -e 's/\.\///g'` where $0 is substituted by cm_dsjobrun.sh in unix env then the value it returns me is SCRNAME=/data/ds/dpr_ebicm_uat/etl/cm3_0/scripts/shell/cm_dsjobrun.sh whereas i ran the same code on linux env The value...

8. Shell Programming and Scripting

AWK command working different in Linux

Hi All I have fired a command in linux table=`echo ${file_name} | awk '{FS="/"; print $NF}' | awk '{FS="."; print $1}'` where file_name has /data/ds/dpr_ebicm_uat/backfill/temp/etl_app_info.csv /data/ds/dpr_ebicm_uat/backfill/temp/etl_app_jobs.csv ...

9. Red Hat

isql command not working in Linux 64bit

I am using Linux RHEL5 64 bit and installed oracle 11g. I want to check ODBC connection , i had modified odbc.ini file when i use this command -isql I am getting following error . bash: isql: command not found Kindly help

10. UNIX for Beginners Questions & Answers

Simple sed command not working; could be a Mac/Linux vs. PC/Linux issue

Hello, I am on a Mac and trying to clean up some monthly files with a very simple SED: sed '3,10d;/<ACROSS>/,$d' input.txt > output.txt (from the input, delete lines 3 - 10; then delete from the line containing <ACROSS> to the end of the file) then output to output.txt Even when I try...

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)