• Subject: More AS/400 Web server Load Testing Results
  • From: "Stone, Brad V (TC)" <bvstone@xxxxxxxxxxxxxx>
  • Date: Wed, 17 Jan 2001 09:37:48 -0600

I've been trying to load test our AS/400 web server.  It's very unscientific
but any results are interesting to me, as I'm sure to others.

I'm using the same box to send the requests as I am to produce the results,
just an FYI.  I am finding that running 500 interactive jobs at once takes
more CPU that the web server tryingn to process them.  I sumbit all jobs to
make there requests to a QSYSNOMAX.

I have a program that simulates getting hits from any number of concurrent
users on the system and records the beginning and ending times from request
to end of response.  This last test I did requesting a CGI program that
returns XML tax information (using vertex to figure taxes).

Anyway, with 100 hits at once the HTTP server started 6 more instance jobs
and the average response time was 2.1222 seconds.

With 500 hits, the HTTP server started 32 more instance jobs and the average
response time was 10.629 seconds.  On this one the machine did seem to
"freeze" for a few seconds most likely from running that many jobs at once.
The web server didn't seem to flinch.  If I could make requests from another
box I'm sure that the times would improve dramatically.

If anyone has worked with Tax software you know that there is a bit of
processing involved.  We pass in taxable amount, city, state, zip and it
returns a few parms, like tax, state tax, etc.  My program then builds XML
with this data (eRPG program).

Here's some machine stats:
Resource        Type-Model  Status                Text                    
CEC01            9406-720   Operational           Main Card Enclosure     
PN01             2468-001   Operational           System Control Panel    
MP01             206A-000   Operational           System Processor Card   
SP01             9164-001   Operational           Service Processor Card  
BCC01                       Operational           Bus Extender            
BCC02                       Operational           Bus Extender            
  MS01           3002-000   Operational           128MB Main Storage Card 
  MS02           3002-000   Operational           128MB Main Storage Card 
  MS03           3002-000   Operational           128MB Main Storage Card 
  MS04           3002-000   Operational           128MB Main Storage Card 
  MS05           3004-000   Operational           256MB Main Storage Card 
  MS06           3004-000   Operational           256MB Main Storage Card 

Any comments?

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