Follow the procedure to select and open buffer pool data files.
About this task
When you have started the long-term analysis function,
as described in Starting the long-term analysis function,
the first page of the long-term analysis wizard is displayed: Figure 1. Long-Term Analysis – The Files Selection window
You use this page to select one or more bpd files that
contain the performance data you want to analyze. Initially, this
dialog box is empty. The example lists three bpd files that were already
selected.
Procedure
Select one or more bpd files to be opened, using the following
steps in reasonable order:
To add one or more bpd files to the (initially empty) list of selected bpd files, click
Add Files.
The Open dialog box is displayed. You use this dialog
box to select one or more bpd files that you want to add to the list of selected bpd
files.
Several sample buffer pool data files (*.bpd) are delivered with
Buffer Pool Analyzer in the …\samples\reporting
folder. The sample files are named
bpa-zos-lta-samplenn.bpd. You can use them to
become familiar with this function.
Select a folder from the Look in list where the bpd files you
want to use are located.
The File of type field shows the file
name extension of buffer pool data files (*.bpd). If your bpd
files do not have the recommended file name extension bpd, select
All files (*.*) from the File of type list to
see the appropriate files.
Click the bpd file to be added to the list of selected bpd files.
You can add multiple files by selecting multiple files in the Open dialog box. To
select a range of files, click the first file, hold down the Shift key, then click the
last file in the sequence. To select several separate files, click the first file, hold
down the Ctrl key, then click the other files as required. To select all files, press
Ctrl+A.
The File name field shows the names of the selected bpd
files.
Click Open.
The Open dialog box closes and the bpd files are
added to the list of selected bpd files.
Restriction: bpd files are usually named at your own discretion, except for the
recommended file name extension bpd. Thus, it is possible that bpd
files exist with different names, but identical or partially identical performance data.
If you accidentally select such files for the long-term analysis, the duplicated
performance records falsify the result. Buffer Pool Analyzer does not
filter out duplicates from the selected bpd files.
To remove one or more bpd files from the list of selected bpd
files, select one or more files in the list, then click Remove
Selected Files.
To remove all bpd files from the list of selected bpd files, click Remove
All Files.
When you have completed your selection of bpd files, and
the list of selected bpd files contains at least one file, click Next.
The selected bpd files are opened, and the data is preprocessed.
This step can take some time, depending on the sizes and contents
of the bpd files. A progress indicator is displayed that shows the
percentage of preprocessing that has been completed. You can click Cancel to
cancel preprocessing and restore the file selection page.
Preprocessing
performs several activities on each bpd file, which eases your selections
and specifications in the following steps:
The subsystems are determined from which performance data was
collected.
The counters and active objects are determined.
The earliest and the latest timestamp in each bpd file is determined.
