Remove shared memory of sap instance

[Former Member]

Hi experts,

After sap instance restart we have clean the shared memory via cleanipc 00 remove.

can any one please how can i remove shared memory for sap instance.

REgards,

[raimundodeoro-pulido]

Hello,

Did you check tx SHMM?

Regards

[Lluis]

Hello Vivek, have you solve that about how to clean shared memory without restart the instance ?

Regards,

Luis

[Reagan]

Hello

You call cleanipc when the SAP instance is stopped and NOT when the system is up and running, which will crash the system.

The syntax to run cleanipc is:

First switch to the sidadm user

su- sidadm

To list the shared memory segments:

cleanipc 00 show

To remove the shared memory segments:

cleanipc 00 remove

NB : The number 00 should be replaced with the appropriated system number. If you have SCS then you need to run against that as well.

Cheers

RB

[Former Member]

Dear Mr. Vivek.

The cleanipc command is used to clear the shared memeory occupied by the SAP system.

Mostly, this command is used (by <sid>adm user) while restarting an SAP system.

So, you stop the system using stopsap, run the cleanipc command to clear the memory and

then start the system using startsap.

Command: cleanipc <instance_nr> remove

However, sometimes, cleanipc fails to cleanup some semaphores saying: Semaphore Key: XX remove failed **** - errno = 1 (Not owner)

Command: cleanipc 06 remove

In this case, login as root and run the following commands:

ipcs –s | grep “the number from the semaphore”

ipcrm –s “the number from the above command”

The above command ipcrm clears up

the semaphore which was not cleared by cleanipc command when executed by <sid>adm user.

Now, if you run cleanipc again using <sid>adm, you will find that the affected semaphore

is now cleared.

Kind rgds,

Ashwin Mane

[Former Member]

Hi Vivek,

You can have a look on Note 17108 - Shared memory still present, startup fails

or exactly what error you are facing can you tell the error texts?

Regards

GG

[Former Member]

  hi vivek,

By issuing cleanipc command, it remove from shared memory from instance also.....
Pls elaborate your query ...

[Former Member]

only cleanipc NN is the command or another command