linux共享内存段

一、查看oracle用户共享内存段的使用情况

[oracle@oracle29 ~]$ ipcs
------ Shared Memory Segments --------
key               shmid      owner       perms      bytes      nattch     status
0x00000000 2129922    oracle    640        4294967296 25
0xbe3bb918 2162692    oracle    640        2097152    25

------ Semaphore Arrays --------
key              semid      owner      perms      nsems
0xf5d4b884 360450     oracle    640        154

------ Message Queues --------
key        msqid      owner      perms      used-bytes   messages

注释：
nattch:共享内存段的进程数
shmid:共享内存段ID