Creating an I/O Activity trace
Use your ISPF editor to create a JCL job that creates an I/O Activity trace.
The following JCL is an example. Remember to change the setup
information (starting with Figure 1. I/O
Activity job stream using ISPF/PDF editor
// in your JCL) as appropriate
for your installation.
EDIT ---- ANDREW.OMPE.JOBS.IOSUMM--------------------- Columns 001 072
Command ===> ________________________________________________ Scroll ===> CSR_
****** ***************************** TOP OF DATA ******************************
0001 /* JCL to produce an IO Activity Report */
0002 //AWOMPEA JOB (TTS1,YUS7),'ANDREW',
0003 // MSGCLASS=V,CLASS=D,NOTIFY=ANDREW
0004 // EXEC PGM=FPECMAIN
0005 //STEPLIB DD DSN=OMPE.RKANMOD,DISP=SHR
0006 //INPUTDD DD DSN=ANDREW.OMPE.TRACES.IOA,DISP=SHR
0007 //DPMOUTDD DD DSN=ANDREW.OMPE.OUT.IOSUMM,DISP=OVR
0008 //JOBSUMDD DD SYSOUT=A
0009 //SYSIN DD *
0010 IOACTIVITY
0011 REPORT
0012 EXEC
0013 ****** **************************** BOTTOM OF DATA ****************************
F1=Help F2=Split F3=Exit F5=Rfind F6=Rchange F7=Up
F8=Down F9=Swap F10=Left F11=Right F12=Cancel
To submit the job, type SUBMIT on the command
line and press Enter.
Example of a summary I/O Activity report
The following example shows a summary I/O Activity report.
LOCATION: DSNCAT OMEGAMON for DB2 Performance Expert (V5R5M0) PAGE: 2-1
GROUP: DSNCAT I/O ACTIVITY REPORT - SUMMARY REQUESTED FROM: NOT SPECIFIED
MEMBER: V71B TO: NOT SPECIFIED
SUBSYSTEM: V71B INTERVAL FROM: 08/14/15 19:32:54.82
DB2 VERSION: V10 TO: 08/14/15 19:56:28.53
CT/PT/DBD NOT IN AVG LEN
BUFFER POOL TOTALS AET EDM POOL REFERENCES EDM POOL AET (BYTES)
---------------------------- -------- --------- --------------------------- ---------- -------- --------- ---------
TOTAL I/O REQUESTS 51 0.019885 CURSOR TABLE - HEADER 1 2 0.131381 7656.00
CURSOR TABLE - DIRECTORY 1 1 0.000568 228.00
TOTAL READ I/O REQUESTS 51 0.019885 CURSOR TABLE - RDS SECTION 9 9 0.022214 1475.11
NON-PREFETCH READS 51 -- TOTAL PLANS ----- 11 12 0.030170 1923.64
PREFETCH READS
WITHOUT I/O 0 PACKAGE TABLE - HEADER 0 0 N/C 0.00
WITH I/O 0 PACKAGE TABLE - DIRECTORY 0 0 N/C 0.00
PAGES READ 0 PACKAGE TABLE - RDS SECTION 0 0 N/C 0.00
PAGES READ / SUCC READ 0.00 -- TOTAL PACKAGES -- 0 0 N/C 0.00
TOTAL WRITE REQUESTS 0 N/C DATABASE DESCRIPTORS 0 0 N/C 0.00
SYNCHRONOUS WRITES 0 N/C
COUPLING FACILITY CASTOUTS 0 N/C
PAGES WRITTEN PER WRITE 0.00
ASYNCHRONOUS WRITES 0 N/C
COUPLING FACILITY CASTOUTS 0 N/C
PAGES WRITTEN PER WRITE 0.00
ACTIVE LOG TOTALS AET ARCHIVE LOG TOTALS AET BOOTSTRAP DATASET TOTALS AET
--------------------- -------- --------- ---------------------- -------- --------- -------------------- -------- ---------
TOTAL WAITS 22 0.018384 TOTAL WAITS 25 0.051894
READ REQUESTS 0 N/C READ REQUESTS 0 N/C READ REQUESTS 13 0.078868
DASD READ 0 N/C
TAPE READ 0 N/C
WRITE REQUESTS 22 0.018384 OFFLOAD REQUESTS 0 N/C WRITE REQUESTS 12 0.022673
CONT. CI / WRITE 1.00 BLOCKS / OFFLOAD 0.00
OTHER WAITS 0 N/C OTHER WAITS 0 N/C CROSS-INVALIDATION ACTIVITY TOTALS
ALLOCATE 0 N/C ALLOCATE 0 N/C ----------------------------- --------
DEALLOCATE 0 N/C DEALLOCATE 0 N/C
OPEN 0 N/C OPEN 0 N/C SYNCHRONOUS READS 27
CLOSE 0 N/C CLOSE 0 N/C REFRESHED FROM GROUP BPOOL 27
HSM RECALL 0 N/C REFRESHED FROM DASD 0
CATALOG LOCATE 0 N/C
MULTI-DATA SET TAPE 0 N/C SEQUENTIAL PREFETCHES 0
TAPE VOL POSITIONING 0 N/C REFRESHED FROM GROUP BPOOL 0
WTOR ISSUED 0 N/C REFRESHED FROM DASD 0
DATA SET UNAVAILABLE 0 N/C
PHYSICAL UNIT UNAV. 0 N/C
RDR SERV.UNAVAILABLE 0 N/C
I/O ACTIVITY REPORT COMPLETE