Tablespaces: Asynchronous I/O (DB2 UDB for
UNIX and Windows) 
To display information on asynchronous I/O for your selected tablespace(s), call the DBA Cockpit.
...
1. In the navigation frame, choose Performance ®Tablespaces.
The Tablespace Snapshot screen appears.
2.
To display more detailed
information, select one or more tablespaces and choose 
Details.
A detail Tablespace Snapshot screen appears.
3. Choose Asynchronous I/O.
If you have selected more than one tablespace, you can use the page buttons on the screen to navigate between them.
|
Field |
Description |
|
Average Time |
|
|
Asynchronous Physical Reads |
Average time in milliseconds required by the I/O servers to read a page from disk and write it into the buffer pool |
|
Asynchronous Physical Writes |
Average time in milliseconds required by the I/O cleaners to read a page from the buffer pool and write it to the hard disk |
|
Data |
|
|
Asynchronous Physical Reads |
Number of data pages that were read asynchronously from disk and written to the buffer pool by the I/O servers (prefetch) |
|
Asynchronous Physical Writes |
Number of data pages that were written asynchronously from buffer pool to disk (I/O cleaners) |
|
Asynchronous Read Requests |
Number of asynchronous data read requests |
|
Index |
|
|
Asynchronous Physical Reads |
Number of index pages that were read asynchronously from disk and written to the buffer pool by the I/O servers (prefetch) |
|
Asynchronous Physical Writes |
Number of index pages that were written asynchronously buffer pool to disk (I/O cleaners) |
|
Asynchronous Read Requests |
Number of asynchronous index read requests |