[stgt] tgt memory usage

Raj Singh rajtpd at gmail.com
Wed Jun 19 09:27:37 CEST 2013


This is the first target and first LUN on this machine.

I can perform the following command with no issues and they complete
instantaneously (under a second with no to very little memory use):

tgtadm --lld iscsi --mode target --op new --tid=1 --targetname

tgtadm --lld iscsi --mode logicalunit --op new --tid 1 --lun 1 -b

But when I perform the following command I run out of memory after 3 -
4 mins (there are no LUN's or Target's on this machine when I run this

tgt-admin --update

To fix this for now I upped the memory on my server from 2G to 12G.
Now when I run the tgt-admin --update command it completes after 8 -
10 mins (during this time the memory consumed by tgt-admin goes to

Not sure if this script should take up this much memory for starting a
single lun and target.



On Tue, Jun 18, 2013 at 8:59 PM, FUJITA Tomonori
<fujita.tomonori at lab.ntt.co.jp> wrote:
> On Tue, 18 Jun 2013 18:26:46 -0700
> Raj Singh <rajtpd at gmail.com> wrote:
>> I am running the following command and it looks like the memory used
>> by tgt-admin spikes up to couple gigs and then the command exits with
>> "Out of Memory". Is this normal?
>> root at controller:~# tgt-admin --update
>> iqn.2010-10.org.openstack:volume-36cc7df0-0030-4083-99c3-145fe28b7e4f
>> Out of memory!
>> I am running the following on a Ubuntu 2 vCPU, with 2 Gigs of memory:
>> root at controller:~# uname -r
>> 3.5.0-23-generic
>> root at controller:~# tgtd -V
>> 1.0.17
>> root at controller:~#
> How many targets and luns do you set up?


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