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"ipcs -m" Displays Incorrect Shared Memory Segment Sizes in Oracle 11G (Doc ID 731658.1)

Last updated on AUGUST 04, 2018

Applies to:

Oracle Database - Enterprise Edition - Version and later
Generic Linux


The "ipcs -m" indicates allocated shared memory segments. In Oracle 11G all of the segments are between 808 and 4096 bytes, where as the instance has a 4GB SGA .Output of ipcs -m:

------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
0x00000000 65536 oracle 660 4096 0
0xd649823c 98305 oracle 660 4096 0
0x7905c133 131074 oracle 666 808 0
0xc90e3f3c 196611 oracle 660 4096 0


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