Chunk table

The chunk table tracks all chunks in the database server.

If mirroring has been enabled, a corresponding mirror chunk table is also created when shared memory is set up. The mirror chunk table tracks all mirror chunks.

The chunk table in shared memory contains information that enables the database server to locate chunks on disk. This information includes the number of the initial chunk and the number of the next chunk in the dbspace. Flags also describe chunk status: mirror or primary; offline, online, or recovery mode; and whether this chunk is part of a blobspace. For information about monitoring chunks, see Monitor chunks.

The maximum number of entries in the chunk table might be limited by the maximum number of file descriptors that your operating system allows per process. You can usually specify the number of file descriptors per process with an operating-system kernel-configuration parameter. For details, consult your operating-system manuals.


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