Table 3.4 InnoDB File I/O Performance Page Regions
| Name | Description |
|---|---|
| Data File IO Activity (bytes) | Graphs the amount of data read and written, in bytes. |
| Data File IO Activity (ops) | Graphs the number of fsync() operations, data reads and writes. |
| Average Bytes Per Read | Graphs the average bytes per read. |
| Double Write Activity | Graphs the number of doublewrite operations and the number of pages written for doublewrite operations. |
| Redo Log IO Activity (bytes) | Graphs the number of bytes written to the log file. |
| Redo Log IO Activity (ops) | Graphs the number of log write requests and the number of physical log writes. |
| Redo Log Waits | Graphs the number of times the log buffer was too small and had to be flushed. |
| Pending IO | Graphs the number of pending asynchronous I/O read/write requests, |
| Pending Flushes | Graphs the number of pending buffer and redo log flush operations. |
| Open Files | Graphs the number of open files in InnoDB. |
| InnoDB IO Configuration | Lists the InnoDB IO-specific system variables and their values. |