Tony, can you tell us a few things about your system environment.


O.S. Release of MPE/iX are you running
HP3000 platform
Current memory configuration
Main application
Number of users high end
Number of jobs running concurrently running in the background




-------------- Original message from Tony Summers <[log in to unmask]>: -------------- 


> Can anybody point me to papers on how we review whether our HP3000s are 
> suffering from memory shortages. 
> 
> Scenario : Over the last few months, we have had some performance 
> problems on our production HP3000 - usually at month end. By very basic 
> observation in Glance we have come to the "conclusion" that certain 
> programs are draining the system's memory so that transactions that 
> would normally take a few seconds to run can take up to one minute to 
> run. 
> 
> Whilst we have ordered more memory as a short term fix (it's so cheap it 
> really is a no-brainer), I'm wondering what others use to review the 
> memory of their programs. For example, can you confirm how much 
> memory is being pre-allocated as a program is loaded by the run 
> statement ? 
> 
> I've certainly noticed that certain programs do appear to trigger the 
> performance problems - and they all seem to have large Working storage 
> tables - I demonstrated to my colleagues that by converting working 
> storage tables to KSAM files you can improve the performance of a 
> program - it also has the additional benefit that the application then 
> doesn't demand so much memory. Many years ago (pre native mode 
> machines) I worked at one company where the HP3000 ran fine until one 
> particular application was loaded - even if that application wasn't 
> using CPU, the machine ground to a halt ! 
> 
> Btw - the number of users connected to our HP3000 grew as a result of a 
> merger - however, the system copes reasonably well most days, which is 
> why I think the problem is mainly related to specific applications. 
> 
> 
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