How as400 memory works

[Alex]

Hi,

I'm curious about how as400 memory works?
How physical file that we chain or read in rpgle will be loaded in memory?
Will the system load 10 consecutives record so next request it already in memory (to be faster)?
If the record in file exceeds 4096 (1 page memory is 4096 right?), what will happen? Will it make the fault page high?
How much memory usage per job in spesific pool id that i created?

Anyone can give me enlighment regarding this.
Try googling but cant found the answer.

Thank you

[Rocky]

This is one of those topics that has a multitude of layers of information. The system does read a number of records/rows from the drives into memory for a read or chain... how many depends on record size, if the file is open for sequential read or update, etc... memory faults is dependant more on the workload and configuration of the pool more than anything else...

For more information go to http://www.ibm.com/support/knowledge...sprintthis.htm - this is the work management manual for 7.1. If you aren't on 7.1 that's ok as this really hasn't changed that much for a very long time.

[Rocky]

Actually you can download the manual for V5R4, 6.1, 7.1, 7.2 or 7.3 from above link.

[Alex]

Thank you Rocky...

[tomliotta]

...that's ok as this really hasn't changed that much for a very long time.

I'm not sure if it's fortunate or unfortunate, but it's only true that "work management" hasn't changed much. The manuals, though, have changed significantly. If a V5R1 manual can be found, I'd recommend it far more than any of the slimmed down versions that are currently available.

[Alex]

Thank you Tom...