The largest dump device is too small

UNIX AIX
1

1.what is dump device in AIX?...
2. i m getting this error message
The largest dump device is too small.

when i check the paging space , it is used only 41%

any help welcome

2

Normally, the dump device is where the OS write a core dump. This can be a very big file and you must have sufficient disk space for this file to dump to disk.

3

is the dump device same as paging space?....i read from the red book that at some devices, dump device and the paging space r the same and they share (mirror) logical volume....
1.so how can i no that my AIX 5L, the dump device and paging space r the same?...
2.( i found out that primary dump device , lg_dumplv size is 128M, pps is 8 so it is 1G and the paging space is hd6 16G and used 44 %).. the question is how can i increase my dump device... if i increase the dump storage, is the pagaing space also increase or not?...
thanks for the reply

4

following :

sysdumpdev -l # to list dump device
sysdumpdev -L # to list last time system dumped
sysdumpdev -e # to estimate the size of a dump under current loading

Largest dump device size in kb ***
This is the size of the dump device.

Current estimated dump size in kb ***

And this is the estimated size of the dump in kb if you system were to crash under your current load.

You just need to :

extendlv lg_dumplv NUM_PPS (example lg_dumplv is your dump lv )

make your dumplv large enough to fit your needs ....

good luck ...

5

sysdumpdev -l Shows you dump setup

-P -p /dump_dev *Sets the primary dumpdev (make a volume not Mirror)
-p -s /Dumpdev * Set the Secondary dump Normaly hd6 (paging space )

Dump Messages The messages you are getting is related to the space where the dump file is copied

eg /var/adm/ras

So when /var is running low on space you will have this messages on your system every day at about 3pm

What to do

  1. Add more space to /var ( chfs -a size=xxxxxx /var (where xxx new size )
  2. have a look in /var/preserve and rmove old junk ( this folder is related to vi -r files )
  3. clean out the /var/adm/wtmp file and make it smaller ( nulladm command is used for this )