Shulou(Shulou.com)06/01 Report--

A long time ago, in a lecture, I used the command ipcs and found that the shared inner segment of oracle was very small, as follows:

Oracle@mydb ~] $ipcs-a-Shared Memory Segments-key shmid owner perms bytes nattch status 0x00000000 32768 root 644 72 2 0x00000000 65537 root 644 16384 2 0x00000000 98306 root 644 2802 0x00000000 1409028 oracle 640 4096 0 0x00000000 1441797 oracle 640 4096 0 0x079918e8 1474566 oracle 640 4096 0-Semaphore Arrays-key semid owner perms nsems 0x87a36da4 1343489 oracle 640154-Message Queues-key msqid owner perms used-bytes messages

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