topic Re: exec(2): insufficient swap or memory available. in Operating System - HP-UX

exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 02:55:36 GMT

dear hpux gurus,
we were unable to start the oracle listener and db2. the error that we hit are:
1.
exec(2): insufficient swap or memory available.
and
2.
return not enough space

what should we do? when i run topas, this the output:
Memory: 6356392K (4444036K) real, 15465712K (10981952K) virtual, 36648K free Pa
ge# 1/32

hope to hear from you.

Re: exec(2): insufficient swap or memory available.

Dennis Handly — Mon, 28 Apr 2008 03:13:25 GMT

Please provide the output of "swapinfo -tam". You are likely out of swapspace.

Re: exec(2): insufficient swap or memory available.

Jeeshan — Mon, 28 Apr 2008 03:13:43 GMT

HI

What is your swapinfo -tm output?

Do you enable swapmem_on ? this is for pseudo swap. Check then revert back.

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 03:20:33 GMT

dear hpux gurus,
how to check this enable swapmem_on for pseudo swap in our server?

attached is the output. hope to hear from you

Re: exec(2): insufficient swap or memory available.

Jeeshan — Mon, 28 Apr 2008 03:25:46 GMT

swapmem_on is a kernel parameter. If your OS version 11.11 apply command
#kmtune -q swapmem_on
11iv2
#kctune -q swapmem_on

and also check dbc_max_pct and dbc_min_pct values also.
You are seems to be in critical situation.

another extract solution is add an additional swap space.but first check the above values.

Re: exec(2): insufficient swap or memory available.

whiteknight — Mon, 28 Apr 2008 03:33:03 GMT

Almond,

your swap_mem_on is enabled, you have less swap space., you need to have 2x of your physical memory

WK

Re: exec(2): insufficient swap or memory available.

Yogeeraj_1 — Mon, 28 Apr 2008 03:35:46 GMT

hi,

you do not have enough have enough swap configured (at least for the amount of physical memory you have).

>Topas ??
Is this an AIX machine? :)

have a look at this post:
http://forums12.itrc.hp.com/service/forums/questionanswer.do?threadId=6516

kind regards
yogeeraj

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 03:37:40 GMT

dear hpux gurus,
attached is the kernel values.
our os is hpux 11.23
hope to hear from you. hopefully there is a workaround and permanent solution to this. thanks a lot

Re: exec(2): insufficient swap or memory available.

Jeeshan — Mon, 28 Apr 2008 04:23:35 GMT

your dbc_max_pct is too high, you can minimize it's value to 10.

anyway, the issue is you have less swap space. add a swap space.

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 05:19:16 GMT

dear hpux gurus,
what is my current swap space? appreciate you can teach me how to read the swapinfo -tam output? the link how to increase the swap memory is very useful. hope to hear from you.

Re: exec(2): insufficient swap or memory available.

YAQUB_1 — Mon, 28 Apr 2008 05:28:33 GMT

Ur physical memory is 8GB so U create 16 swap space.

how U create swap space in Ur system, here is process:-
1) lvcreate -C y -m 1 -L -n lvolx /dev/vg00
2) Next create an entry in /etc/fstab like this:
/dev/vg00/lvolx ... swap pri=2 0 0 --- (check same parameter already is there)

3) swapon -a

Hope it'll help 4 U.

Re: exec(2): insufficient swap or memory available.

YAQUB_1 — Mon, 28 Apr 2008 05:29:58 GMT

sorry, 16GB

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 05:38:08 GMT

dear hpux gurus,
i can't find any swap entry in /etc/fstab.
below is the vg00 extraction from our /etc/fstab.
/dev/vg00/lvol3 / vxfs delaylog 0 1
/dev/vg00/lvol1 /stand vxfs tranflush 0 1
/dev/vg00/lvol4 /home vxfs delaylog 0 2
/dev/vg00/lvol5 /opt vxfs delaylog 0 2
/dev/vg00/lvol6 /tmp vxfs delaylog 0 2
/dev/vg00/lvol7 /usr vxfs delaylog 0 2
/dev/vg00/lvol8 /var vxfs delaylog 0 2
hope to hear from you.

Re: exec(2): insufficient swap or memory available.

YAQUB_1 — Mon, 28 Apr 2008 05:57:14 GMT

create the swap space, follow above process...

Re: exec(2): insufficient swap or memory available.

Sajjad Sahir — Mon, 28 Apr 2008 05:57:40 GMT

Dear Almond
please send u swapinfo -tam out put
u can use the swapinfo command to see u swap space
please send out put of these two

#swapinfo -tam
#dmesg | grep phys

thanks and regards

sajjad

Re: exec(2): insufficient swap or memory available.

Sajjad Sahir — Mon, 28 Apr 2008 06:01:06 GMT

Dear Almond

To fully utilize all of the RAM on a system there must be a sufficient amount
of virtual memory to accomodate all processes . The virtual memory be at least eaqual to physical memory plus application
size.
For a process
to spawn it needs a sufficient amount of virtual memory to be placed in
reserve. There should be a sufficient amount of free device swap to open any
processes that may be spawned during the course of operations. By subtracting
thereserve from the device total you can determine this value.
If there is an insufficient amount available ( typically from device swap)
you will receive an error : cannot fork : not enough virtual memory. If
this error is received , you will need to allocate more device swap. This
should be configured on a disk with no other swap partitions, and ideally of
the same size and priority of existing swap logical volumes to enable
interleaving.

thanks and regards

sajjad sahir

Re: exec(2): insufficient swap or memory available.

Sajjad Sahir — Mon, 28 Apr 2008 06:03:29 GMT

dear Almond

u can create new device swap

in another volume group

eg: lvcreate -L 1000 /dev/vg01/lvol9
swapon /dev/vg01/lvol9
then u have to make an entry in /etc/fstab file for next reboot onwards if u need it

thanks and regards

sajjadsahir

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 06:06:55 GMT

dear hpux gurus,
attached is the phys output. hope to hear from you. thanks a lot

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 06:06:59 GMT

dear hpux gurus,
attached is the phys output. hope to hear from you. thanks a lot

Re: exec(2): insufficient swap or memory available.

apple — Mon, 28 Apr 2008 06:27:35 GMT

can i increase the existing swap rather than creating the new one. i'm sorry if my question is not good. i'm a newbie. hope to hear from you. thanks a lot