e=28 semget(20038,1,2047) (28: No space left on device) on Solaris 10

[Former Member]

We are running 5 SAP ECC 6.0 systems on Solaris 10 with the project definitions configured as mentioned in note 724713.

Now after the fifth system was installed, we have problems to start all of the systems.

The error can occur for either of the systems and in dev_disp it would say:

• ERROR => e=28 semget(20038,1,2047) (28: No space left on device) [semux.c 928]

• ERROR => CCMS: SemInit failed [alxxappl.c 610]

• ERROR => CCMS: sAlInit: could not create/attach shared memory key 13 (rtc = 255) [alxx.c 1187]

Before the fifth system was installed, we didn't experience any problems.

Do we have to change the project definitions and if yes how?

We have defined 5 projects (each system) with the following values for each project:

SD2:200:SAP System SD2:orasd2,sd2adm::process.max-sem-nsems=(priv,2048,deny);project.max-sem-ids=(priv,1024,deny);project.max-shm-ids=(priv,256,deny);project.max-shm-memory=(priv,18446744073709551615,deny)

Best Regards

Walter

[markus_doehr2 · Accepted solution]

Hi Walter,

do you have the users assigned to the project in /etc/user_attr?

If yes, you'd need to increase max-shm-ids (1024).

--

Markus

[Former Member]

Thank you Markus,

It is helped me in a critical situation.

Regards,

Govardhan.

[Former Member]

Thanks Markus

The increase of max-shm-ids with for example

projmod -s -K "project.max-shm-ids=(priv,1024,deny)" SD2

as you pointed out in the first place, did help anyway!

It looks like that the change was not effective right away but with some delay ... perhaps a synchronization issue?

Cheers

Walter

[Former Member]

I have changed the project vith projmod it looks now like :

htudv# projects -l `projects -d sd2adm`

SD2

projid : 200

comment: "SAP System SD2"

users : orasd2

sd2adm

groups : (none)

attribs: process.max-sem-nsems=(priv,2048,deny)

project.max-sem-ids=(priv,1024,deny)

project.max-shm-ids=(priv,1024,deny)

project.max-shm-memory=(priv,18446744073709551615,deny)

htudv#

But when I start SD2 I still get:

• ERROR => e=28 semget(20038,1,2047) (28: No space left on device) [semux.c 928]

• ERROR => CCMS: SemInit failed [alxxappl.c 610]

And what confuses me is that all the processes started under sd2adm I watched with

prctl -t privileged <pid> , have a value like

project.max-shm-ids

privileged 128 - deny ???

Why not 1024 as defined in the project?

BR

Walter

[markus_doehr2]

This is only for new started processes.

You can try the following:

- kill saposcol of the system SD2

- kill sapstartsrv of system SD2 (this is not stopped when you initial 'stopsap')

- stop oracle, listener and all other processes belonging to sd2adm and orasd2

Then try to start them again with the new project settings.

--

Markus

[markus_doehr2]

If this does still not work, you may need to add more swap space to the system. I had the same issue with a zoned box.

--

Markus

[Former Member]

Thanks Markus

Yes we have assigned the users:

sd2adm::::project=SD2

orasd2::::project=SD2

How would you change the value? By deleting/readding the project or with projmod?

Walter

[markus_doehr2]

since the syntax of projmod is... ehm... "strange", I use the Solaris Management Console for that:

login as root

start "smc" (with DISPLAY set or on the console)

wait a minute or two until smcwebserver is started

configuration via SMC is pretty straightforward (system configuration - projects)

However, you could also just delete with vi the entry in /etc/projects and create it new.

--

Markus