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
| Heading | Description | Format |
|---|---|---|
| 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 |
Str |
| 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 |