Trouble shoot Out Of Memory Error for Oracle

 

Please compile the following program and run it to check whether OS is releasing any shared memory for application or not.

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#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <errno.h>
int main()
{
int shmid,size;
void *buf=0;
extern int errno;
/* Change it to size of shared memory you want (in MB) */
size = 200;
if ((shmid=shmget(rand()%10,1048576*size,0666|IPC_CREAT))==-1)
{
printf(“Error during shmget, OS Error %d\n”,errno);
exit(1);
}
if (((void *)shmat(shmid,(void *)0,0666))==0)
{
printf(“Error during shmat, OS Error %d\n”,errno);
exit(1);
}
shmctl(shmid,IPC_RMID,buf);
printf(“Succesfully got, attached a %dM shared memory segment\n”,size);
}

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$cc -o <output filename>  <program.c>