This page shows IO requests and latency to the disks on the Exadata Storage Servers (cells): Flash Disks and Hard Disks.
The data is sourced from CellCLI where the objectType is CELLDISK.
Note: Spotlight on Oracle RAC may include monitoring of Exadata systems depending on the license purchased.
To open the Cell Disks page
Click Exadata | Cell Disks.
Cell Host
Will the charts / grid on this drilldown page be for all cells, or filtered on one cell? Select as you require.
Charts on the Cell Disks page
Notes:
Chart | Description |
---|---|
Total IO by Cell Disk (Top 20) |
Total I/O requests (read and write for large and small blocks) per Cell Disk. The cell disks with the most active IO (Top 20) are listed. |
Average Latency by Disk (Top 20) |
The average time delay experienced by reading single blocks per request from a cell disk. The cell disks with the highest average latency (Top 20) are listed. |
IO by Cell Disk Grid
Column | Description |
---|---|
Cell Host | The name of the Exadata Storage Server (Cell) host |
Cell Disk |
The Exadata Storage Server (Cell) disk.
|
Latency(ms/request) | The time delay experienced by the disk per I/O request for a single block read. |
Total Reads/Sec | The rate of I/O read requests (number per second) to the disk. |
Total Writes/Sec | The rate of I/O write requests (number per second) to the disk. |
Cumulative Read Latency (seconds) | The cumulative time spent reading from the disk (single block reads). |
Cumulative Write Latency (seconds) | The cumulative time spent writing to the disk. |
Mbytes Read/Sec | The rate of I/O read requests (megabytes per second) to the disk. |
Mbytes Written/Sec | The rate of I/O write requests (megabytes per second) to the disk. |
Total Read Mbytes | The total number of megabytes read from the disk. |
Total Write Mbytes | The total number of megabytes written to the disk. |
Total Read Requests | The total number of read requests to the disk. |
Total Write Requests | The total number of write requests to the disk. |
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