IBM 000-8697 Manual Do Utilizador

Operating OnLine

Execute tbstat -B to obtain the following buffer statistics:

■

Address of every regular shared-memory buffer

■

Page numbers for all pages remaining in shared memory

■

Address of the first user process waiting for each buffer

Refer to

 for further information about the tbstat -B output.

Execute tbstat -p to obtain statistics about cached reads and writes. The
caching statistics appear in four fields on the top row of the output display.
The first pair of statistics appears in the third and fourth positions:

The second pair of statistics appears in the seventh and eighth positions of
the top row of the display:

Note that the number of reads or writes can appear as a negative number if
the number of occurrences exceeds 2

32

. To reset the profile counts, execute

.

Refer to

 for further information about the tbstat -p output.

Execute tbstat -P to obtain the tbstat -p display, with an additional field,

BIGreads

, the number of big-buffer reads. Refer to

 for further

information about the big buffers.

bufreads

is the number of reads from shared-memory buffers.

%cached

is the percentage of reads cached.

bufwrits

is the number of writes to shared memory.

%cached

is the percentage of writes cached.