Re: Cobol programming issues

Hi
I would run performance tools and analyze the results.
As far as I remember, I open input or I-O if I'm reading a record.
Check Pool size.
You did not mention how many times activation incurs nor how many users, increased by how many?
Check program PAG size, does sharing occur.
There are of course many other options as I'm sure others, more current will point out.
Hope this helps
Jack Solomon





On 2014/05/19 04:57 PM, Imad Moukaddam wrote:

Hi

Well this is a difficult one to explain :
We have developed a web application (JAVA) that launches COBOL programs through SOCKET programs. Everything is working just fine.
When we started to increase number of users through a performance tool, we have noticed a strange behavior on the COBOL programs, as they were running very slow (for some transactions, average time was in the range of 10-15 sec.). Upon drilling down, we found that a simple READ statement (COBOL side) is consuming about 110 ms, which is huge comparing to the normal status (average time was less than 1 ms normally)!

We have checked the following:
CPU is OK
Memory is ok
No locks (we are reading PF in OPEN OUTPUT mode)
The hard disk is a data center, known to support heavy usage

Any ideas?
Thanks

Imad


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