TPDC Manual (G06.24+)

Using the SPAM Performance Data Charts and
Reports
Tandem Performance Data Collector (TPDC) Manual—526357-001
5-12
Disc File Block Splits Shares (BLKSPLT)
Disc File Block Splits Shares (BLKSPLT)
This 74-column chart shows which disk files are experiencing the most block splits. It is
ordered by descending block splits (summed over all opens of any given file or
partition), so only the files experiencing block splits are shown. The chart displays:
•
File name
•
Number of block splits
•
Individual share of total block splits and a graph of this share
•
Cumulative share of total block splits
This chart uses the GLOBINFO and DOPENSUM entities.
Parameters used are:
•
LID—specifies the Measure Load ID
•
EXCLUDE—specifies a value under which to exclude the number of requests per
second
•
SECTION—specifies the report section number
The chart is sorted in descending order of total block splits.
Disc File I/O Activity Distribution (DFIODST)
This 74-column chart displays a table of DISCOPEN disk file I/O activity distribution
across volumes and CPUs. Intended as an aid to file balancing, it includes:
•
CPU number
•
A CPU’s contribution to systemwide cache hits/disk I/Os
•
Disk volume name
•
A volume’s contribution to the primary CPU’s cache hits/disk I/Os
•
Disk file/partition subvolume and file name
Disc File Block Split Shares for System \CSO (Release D20)
----------------------------
[Ttl = 301 Splits ( 0.1/Sec)]
Total <----Shr% = %-age of Total----> Cum.
$Volume .Subvol .Filename Splts Shr% 0 5 10 15 20 25 30 Shr%
-------------------------- ----- ==== +----+----+----+----+----+----+ ----
$LAB .NSS3 .DBPCB 235 78.1 |*****************************> 78.1
$LAB .NSS3 .DBNET 38 12.6 |************* | 90.7
$LAB .NSS3 .DBCPU 11 3.7 |**** | 94.3
+----+----+----+----+----+----+
0 5 10 15 20 25 30