Spotlight on Oracle 10.9

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Spotlight on Oracle 10.9 - Release Notes

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

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:

Every chart has a legend (list of symbols) to its right that describes the various series (line graphs) on the chart.
Click an item in the legend to highlight its series (line) in the chart. Click a second time to return the series to its normal appearance.
Move the mouse pointer over an item in the legend to view the current value for that series within the chart.

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.

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. Identifiers beginning with CD are for Hard Disks. Identifiers beginning with FD are for Flash Disks.
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.

Spotlight on Oracle 10.9 - Release Notes