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>If one were to measure the elapsed CPU
>time to perform some action such as
>pressing the PageUp key 200 times while
>browsing a list of records in a 5250
>subfile, then were to perform an equivalent
>action using the Web interface,
>what would the difference in CPU time be?
I have finished the first round of timings. I appreciate comments on
possible fine-tuning of the metrics I used. Basically, I did a customer
inquiry, selecting all records and did a page down 100 times on both the
green screen and WebFacing. I tracked CPU time for WAS, HTTP, QINTER,
appropriate QSYSWRK jobs.
Here is the summary:
CPU Int Rsp AuxIO CPU % El time
WebFacing 27.7 0 .0 18 7.4 5:06
Green screen 1.3 108 .0 363 1.2 1:08
The WF version takes 20 times more total CPU, but uses half the interactive
CPU than the green screen version. It also takes 5 times longer to page
through 100 pages than the green screen did on a Pentium II 450 with 128
megs RAM.
And the details:
Type 9406 model 820 prc grp P30 fc 24AA 3072 meg rel V5R1M0.
WebSphere Version : 4.0.2
Edition: Advanced Edition for Multiplatforms
Build date: Tue Dec 18 00:00:00 EST 2001
Build number: a0150.05
HTTP server Apache
Idle state
% CPU used . . . . . . . : 18.7 System ASP . . . . . . . :
403.6 G
% DB capability . . . . : .6 % system ASP used . . . :
59.1272
Elapsed time . . . . . . : 00:03:01 Total aux stg . . . . . :
403.6 G
Jobs in system . . . . . : 1531 Current unprotect used . :
8566 M
% perm addresses . . . . : .010 Maximum unprotect . . . :
10701 M
% temp addresses . . . . : .096
Sys Pool Reserved Max ----DB----- --Non-DB--- Act- Wait-
Act-
Pool Size M Size M Act Fault Pages Fault Pages Wait Inel
Inel
1 519.47 201.14 +++++ .0 .0 5.4 5.4 1334 .0
.0
2 413.52 .30 51 7.4 38.9 1.0 2.9 120.0 .0
.0
3 100.00 .00 20 .0 .0 .0 .0 .0 .0
.0
4 15.00 .00 5 .0 .0 .0 .0 .0 .0
.0
5 768.00 .00 15 28.7 49.0 46.3 54.7 174.5 .0
.0
6 256.00 .01 25 .0 .0 .0 .0 .0 .0
.0
7 1000.00 .59 200 .0 .0 .0 .4 941.8 .0
.0
Shared pool config:
Main storage size (M) . : 3072.00
Defined Max Allocated Pool -Paging Option--
Pool Size (M) Active Size (M) ID Defined Current
*MACHINE 519.47 +++++ 519.47 1 *FIXED *FIXED
*BASE 413.52 51 413.52 2 *CALC *CALC
*INTERACT 768.00 15 768.00 5 *CALC *CALC
*SPOOL 15.00 5 15.00 4 *CALC *CALC
*SHRPOOL1 256.00 25 256.00 6 *CALC *CALC
*SHRPOOL2 1000.00 200 1000.00 7 *CALC *CALC
*SHRPOOL3 100.00 20 100.00 3 *CALC *CALC
Start application, Inquiry, enter, page down 100 times, F3 back to command
line.
Time CPU Int Rsp AuxIO CPU %
Green 1:08 1.3 108 .0 363 1.2
Before WF
Subsystem/Job Type Pool Pty CPU Int Rsp AuxIO CPU %
QEJBADV4
DEFAULT_SE BCI 7 25+ 262.1 0 .0
QEJBADMIN BCI 7 25+ 109.1 0 .0
QEJBMNTR ASJ 7 25 .0 0 .0
WEBFACING BCI 7 25+ 1961.5 0 1.1
QHTTPSVR
WEBSERVER BCH 7 25 113.0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .1 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
QSYSWRK
QQFVTSVR BCI 2 50 .9 0 .0
QQFWFSVR BCI 2 50 .9 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .4 0 .0
QSQSRVR PJ 3 10 .5 0 .0
QSQSRVR PJ 3 10 .1 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .2 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 20 3.1 0 .0
QSQSRVR PJ 3 20 1.3 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .5 0 .0
QSQSRVR PJ 3 20 .0 0 .0
After WF 5:06 elapsed
Subsystem/Job Type Pool Pty CPU Int Rsp AuxIO CPU %
QEJBADV4
DEFAULT_SE BCI 7 25+ 262.3 0 .0
QEJBADMIN BCI 7 25+ 109.2 0 .0
QEJBMNTR ASJ 7 25 .0 0 .0
WEBFACING BCI 7 25+ 1987.5 0 8.1
QHTTPSVR
WEBSERVER BCH 7 25 113.4 0 .1
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .1 0 .0
WEBSERVER BCI 7 25 .0 0 .0
WEBSERVER BCI 7 25 .0 0 .0
QINTER
QQF4B2CE00 INT 5 20 .6 0 .0 18 .1
QSYSWRK
QQFVTSVR BCI 2 50 1.2 0 .1
QQFWFSVR BCI 2 50 1.3 0 .1
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .4 0 .0
QSQSRVR PJ 3 10 .5 0 .0
QSQSRVR PJ 3 10 .1 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .2 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 10 .0 0 .0
QSQSRVR PJ 3 20 3.1 0 .0
QSQSRVR PJ 3 20 1.3 0 .0
QSQSRVR PJ 3 20 .0 0 .0
QSQSRVR PJ 3 20 .5 0 .0
QSQSRVR PJ 3 20 .0 0 .0
% CPU used . . . . . . . : 20.4 System ASP . . . . . . . : 403.6
G
% DB capability . . . . : .4 % system ASP used . . . :
55.8752
Elapsed time . . . . . . : 00:35:03 Total aux stg . . . . . : 403.6
G
Jobs in system . . . . . : 1551 Current unprotect used . : 8739
M
% perm addresses . . . . : .010 Maximum unprotect . . . : 10701
M
% temp addresses . . . . : .096
Sys Pool Reserved Max ----DB----- --Non-DB--- Act- Wait-
Act-
Pool Size M Size M Act Fault Pages Fault Pages Wait Inel
Inel
1 519.47 202.01 +++++ .0 .0 1.7 1.7 162.6 .0
.0
2 413.52 .30 51 .2 17.1 .3 .6 176.5 .0
.0
3 100.00 .00 20 .0 .0 .0 .0 .0 .0
.0
4 15.00 .00 5 .0 .0 .0 .0 .0 .0
.0
5 768.00 .00 15 1.0 2.8 1.5 4.2 90.2 .0
.0
6 256.00 7.01 25 1.0 4.9 5.1 8.9 .5 .0
.0
7 1000.00 .59 200 .0 .0 .0 .9 978.0 .0
.0
The first thing to note is that the Aux I/O doesn't seem to be charged to
any identifiable job under the WebFacing scenario. The second thing to note
is the differences in CPU used. I'll be merciful and leave out all the jobs
which used no additional CPU:
Subsystem/Job Type Pool Pty CPU Int Rsp AuxIO CPU %
QEJBADV4
DEFAULT_SE BCI 7 25+ .2 0 .0
QEJBADMIN BCI 7 25+ .1 0 .0
QEJBMNTR ASJ 7 25 .0 0 .0
WEBFACING BCI 7 25+ 26.0 0 7.0
QHTTPSVR
WEBSERVER BCH 7 25 .4 0 .1
QINTER
QQF4B2CE00 INT 5 20 .6 0 .0 18 .1
QSYSWRK
QQFVTSVR BCI 2 50 .3 0 .1
QQFWFSVR BCI 2 50 .1 0 .1
TOTALS 27.7 0 .0 18 7.4
Green screen 1.3 108 .0 363 1.2
The WF version takes 20 times more total CPU, but uses half the interactive
CPU than the green screen version. It also takes 5 times longer to page
through 100 pages than the green screen did on a Pentium II 450 with 128
megs RAM.
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