The onstat -g seg command displays a list of the shared memory segments that have been acquired for this OnLine instance.
Segment Summary: id key addr size ovhd class blkused blkfree 1401 1381451777 a000000 167772160 7504 R* 40376 584 1302 1381451778 14000000 130023424 4560 V 9341 22403 1303 1381451779 1bc00000 1048576 624 M 29 227 Total: - - 298844160 - - 49746 23214 (* segment locked in memory) No reserve memory is allocated
|id||The shared memory identifier returned from the call to shmget() for acquiring shared memory segments.||Dec|
|key||The key passed to shmget(), based on the value of SERVERNUM.||Dec|
|addr||The in-memory address of the shared memory segment.||Hex|
|size||The size of the shared memory segment in bytes.||Dec|
|ovhd||The number of bytes of overhead within this segment required to track information.||Dec|
|class||The segment type for this block of shared memory.
R Resident V Virtual VX Virtual Extended M Message B Extendable Buffer
|blkused||The number of (2 * pagesize in K) K blocks in the segment that have been used.||Dec|
|blkfree||The number of (2 * pagesize in K) K blocks remaining in the segment.||Dec|
|Virtual segment low memory reserve (bytes)||The size of reserved memory for use when critical activities are needed and the server has limited free memory||Dec|
|Low memory reserve used 0 times and used maximum block size 0 bytes)||The number times that the server has used the reserved memory and the maximum memory needed||Int|