The syschkio table provides I/O statistics for individual chunks that the database server manages.
| Column | Type | Description |
|---|---|---|
| chunknum | smallint | Chunk number |
| reads | integer | Number of physical reads |
| pagesread | integer | Number of pages read |
| writes | integer | Number of physical writes |
| pageswritten | integer | Number of pages written |
| mreads | integer | Number of physical reads (mirror) |
| mpagesread | integer | Number of pages read (mirror) |
| mwrites | integer | Number of physical writes (mirror) |
| mpageswritten | integer | Number of pages written (mirror) |