This screen provides data buffer pool I/O information for each session attached
to the DBEnvironment.
To invoke the IO Data Session screen, use the d s command from the IO
subsystem, or use the /i d s command from other subsystems.
When you invoke this screen, its counters are set to zero.
Field Definitions
- REFRESH
The screen refresh rate, in seconds.
- SESSIONS
The number of DBEnvironment sessions.
- SORTIODATA
An indicator of how the sessions are sorted. The sessions are sorted in
descending order by the value in the column indicated by the asterisk. In
the above example, sessions are sorted by their DATA DISK WR values. For
more information, see the SET SORTIODATA command.
- PID
The HP-UX process identification number of the DBEnvironment session.
- BUFF ACCESS
The number of page requests the session has issued to the data buffer pool.
- DATA DISK RD
The number of pages that are not in the data buffer pool at request time.
The operating system must fetch these pages, either from the operating
system buffer pool or by a physical disk read.
- DATA DISK WR
The number of dirty pages from the data buffer pool that were logically
written to disk.
- MISS RATE
The percentage of pages that are not in the data buffer pool at request
time. The percentage is calculated as follows:
MISS RATE = (DATA DISK RD / BUFF ACCESS) * 100
Related SET Commands
The SET commands in the following table affect this screen.
![[datases]](img/datases.gif)
