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  1.  Home
  2. RPG400-L
  3. November 2005

RE: RE: Optimizing File I-O in RPG IV/ I-Series

Kurt wrote:

>Nevermind... Just saw Rory's followup email.

Kurt, I should have said that the ODP buffer size on RISC boxes is 128K (rather 
than the 32K used on CISC boxes). OS/400 only uses the first 4K of the buffer 
when it does its default blocking, so they 'waste' 124K of usable buffer space 
on a RISC box...!
 
Therefore you should use:
 
OVRDBF...SEQOBLY(*YES blocking-number)
 
where blocking-number = (131072 / physical-file-record-length) and round that 
down. Of course the IBM article explains it much better than me (including the 
fact that
 
HTH,
 
Rory

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