Re: Performance Bottleneck?

Aaron,

Thanks for the tip. Using the TRCTCPAPP command yielded some interesting
results. In particular, the following -

00000040:797896 ap_log_rerror()
00000040:797912 log_error_core()
00000040:798024 log_error_core(): "[Wed May 21 13:02:38 2008] [error]
00000040:928264 ap_log_rerror()
00000040:928288 log_error_core()
00000040:928344 log_error_core(): "[Wed May 21 13:02:38 2008] [error]
-- 05/21/2008 13:02:39 ---
00000040:054808 ap_log_rerror()
00000040:054832 log_error_core()
.
.
.--- 05/21/2008 13:02:40 ---
00000040:028696 ap_log_rerror()
00000040:028720 log_error_core()
00000040:029320 log_error_core(): "[Wed May 21 13:02:40 2008] [error]
.
.
.
--- 05/21/2008 13:02:52 ---
00000040:014488 ap_log_rerror()
00000040:014520 log_error_core()
00000040:014608 log_error_core(): "[Wed May 21 13:02:52 2008] [error]
00000040:144808 ap_log_rerror()
00000040:144840 log_error_core()
00000040:144896 log_error_core(): "[Wed May 21 13:02:52 2008] [error]
00000040:265592 cgi_read_stdout.
00000040:265680 xlate_out_filter() - output data from upstream length
00000040:265904 cgi_read_stdout.

Note the first time of 13:02:39 (which is when the RPG completed) and the
last time - 13 seconds!

The first two lines of the log in the IFS (which corresponds to the above
spool file snippet) have this -

[Wed May 21 13:02:34 2008] [error] [client xx.xx.xx.xx] QzhbCgiParse: No
matching field name found., referer: http://.......
[Wed May 21 13:02:38 2008] [error] [client xx.xx.xx.xx] QzhbCgiParse: No
matching field name found.ght: bold;, referer: http://.........

And then it has a whole bunch of entries.....but they do not seem to contain
error messages - just HTML that is in the page.

Anyone have any thoughts?

Thanks,

Joe

On 5/21/2008 at 11:05 AM, in message

<1211385927.10614.6.camel@aaronthinkpad>, Aaron
Bartell<aaronbartell@xxxxxxxxx> wrote:

One thing you could do is turn on verbose mode in Apache and see if
there is anything in there. I believe it has timestamps which would
allow you to determine if it was Apache or the network or the client
rendering the HTML.

Here is how I do it:
STRTCPSVR SERVER(*HTTP) HTTPSVR(MYRXS '-vv')

Run a few transactions and make sure the lag occurs. Then end the same
named HTTP server instance and do a WRKSPLF QTMHHTTP and you should see
a handful of spool files that were created. Note you need to end the
instance for the spool files to be created.

If you don't want to stop the HTTP server instance you can do a
TRCTCPAPP command and then use PRTTRC (I believe) to view the results.
This is what IBM usually asks me to do when I am on 2nd and/or 3rd level
support trying to figure out an issue.

HTH,
Aaron Bartell
http://mowyourlawn.com



On Wed, 2008-05-21 at 10:38 -0500, Joe Wells wrote:

I have an RPG-CGI web application that would appear to be periodically
hitting a bottleneck somewhere along the line. I have tracked the time

it

enters and exits the RPG and that always results in subsecond response.
Unfortunately, the web page itself does not display that quickly.

Sometimes

it is subsecond, but frequently it is much more (as much as 10-15

seconds!).

We have given QHTTPSVR lots of memory, but that had no effect.

So.......I

am looking for suggestions of where to look next. I specifically want

to

rule out the "i" as the culprit before I contact the network folks to

have

them sniff around.

Thanks,

joe