HP 3000 Manuals

HP SPT/XL User's Manual: Analysis Software

File Use Statistics 

The File Statistics presented in this screen are averaged across all
instances of the active transaction.  For example, if FWRITE is called
four times during one instance of the transaction and two in the next
instance, the average number of calls would be three.

Look for a large percentage in the Process Time field to identify in
which file most of the time is spent.

The display shows intrinsic count and processing and CPU times for each
file accessed using MPE File System Intrinsics during the current
transaction.  Because access to mapped files through pointers bypasses
the MPE File System Intrinsics, this access is not reported on this
screen.

Occasionally, you may see Unspecified File Name, as a result of
processing a file with no given name; that is, the formal designator was
not specified in the FOPEN or HPFOPEN call.

Occasionally, you may see Unknown File Name, which may result from using
IOWAIT(0) calls within an application or which may be caused by
file#processing of files that are opened by subsystem code in NL.PUB.SYS.

Files accessed by Compatibility Mode procedures are not reported in this
display.  This applies to both application and system CM code.

TurboIMAGE data sets are shown using their MPE file names not their
TurboIMAGE data set names.

Access this screen by selecting  File Use.


          Figure 5-8.  File Use Statistics 

Screen Definitions 

File Reads                Average number of times FREAD, FREADDIR, READ,
                          READX, or FREADLABEL was called per
                          transaction.

File Writes               Average number of times FWRITE, PRINT,
                          FWRITEDIR, FDELETE, FUPDATE, or FWRITELABEL was
                          called per transaction.

File Opens                Average number of times that the file was
                          opened (HPOPEN, FOPEN) per transaction.

File Closes               Average number of times that the file was
                          closed (FCLOSE) per transaction.

Process Time Avg.         The average time spent in MPE File System
                          Intrinsics accessing the file per transaction.

Process Time % Tot.       Percentage of total processing transaction time
                          spent in MPE File System Intrinsics accessing
                          the file per transaction.

CPU (sec)                 Average amount of CPU time used by MPE File
                          System Intrinsics accessing the file.

MPE/iX 5.0 Documentation