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How do I delete a semaphore?

How do I delete a semaphore?

Access the MEMORY application menu as described in Accessing KM Commands and InfoBoxes. Select Remove Semaphores. BMC PATROL displays the Remove Semaphores dialog box. Type the numeric ID in the Semaphore ID field and click either Apply or Apply To Selected.

Which command can be used to remove an IPC object from the kernel?

ipcrm command
ipcrm command in Linux is used to remove some IPC(Inter-Process Communication) resources. It eliminates the IPC objects and their associated data structure form the system. One must be a creator or superuser or the owner of the object in order to remove these objects.

How do I delete a semaphore in Windows?

installed, typically drive C: or D:. 6) Run ipcs.exe to display information about active IPC facilities. 7) Run ipcrm.exe to remove semaphores/shared memory identifiers….

  1. Shutdown SharePlex.
  2. Reboot the server.
  3. Restart SharePlex.

How do you release semaphores in Linux?

To release or signal a semaphore, we use the sem_post function: int sem_post(sem_t *sem); A semaphore is initialised by using sem_init(for processes or threads) or sem_open (for IPC). sem_init(sem_t *sem, int pshared, unsigned int value);

What does Shmat return?

The shmat() function attaches to the shared memory segment specified by shmid and returns the address of the shared memory segment.

How do you clear shared memory in SAP windows?

On Windows: You can use Microsoft Process Explorer to check the shared memory handle of saposcol and then try to find if another process holds it. You should see that some disp+work has the handle. Kill this and then you should be able to stop saposcol and clean the memory.

What is IPC command?

The ipcs command writes to the standard output information about active interprocess communication facilities. If you do not specify any flags, the ipcs command writes information in a short form about currently active message queues, shared memory segments, semaphores, remote queues, and local queue headers.

How do I clear the message queue in Linux?

Use the Unix command ipcs to get a list of defined message queues, then use the command ipcrm to delete the queue.

What’s the difference between Sem_init () and Sem_open ()?

h> int sem_init (sem_t *sem, int pshared, unsigned int value); sem_init is the equivalent of sem_open for unnamed semaphores. One defines a variable of type sem_t and passes its pointer as sem in the sem_init call. Or, one can define a pointer and allocate memory dynamically using malloc or a similar function call.

How do I delete hanging shared memory segments in SAP windows?

What is Shmat used for?

What does Shmat mean?

The shmat function is used to attach a shared memory segment to a process, so that the memory contents can be accessed. Note: See the shmget function description in section shmget for general information about shared memory segments. The id argument to shmat specifies a shared memory segment id.

How do I find IPC in Linux?

All the IPC facility has unique key and identifier, which is used to identify an IPC facility. $ ipcs -q : It lists only message queues for which the current process has read access. # ipcs -s : To list the accessible semaphores. # ipcs -m : To lists the shared memories.

What is shared memory in SAP?

Shared Memory is an area on the application server. This is similar to the Primary memory in a Computer, which is used for faster access to data. In BW, we use SAP Memory to store data that is accessed frequently by programs, queries etc.

What is difference between SAP memory and ABAP memory?

Summary: SAP memory is global and can be used to pass data across main sessions while ABAP memory is local and is uses to pass data across internal sessions. GET PARAMETER and SET PARAMETER are used to write and read to SAP memory while IMPORT FROM MEMORY and EXPORT TO MEMORY are used for ABAP memory.

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