Re: Synch/Asynch was Re: Expensive op codes

[John P Carr <jpcarr@xxxxxxxxxxxx>]

>Thanks John! Basicall the problem is blocking. The synchronous opcodes
don't
>do it, the others do. One minor note on the following paragraph - doesn't
>READ, even if for input only, have to use the Index Object if the File spec
>says it's keyed?

>> The READ(for input only) doesn't concern itself with having to read the
>> Index Object for what it wants,   It goes straight to the data space.
>> Reading the data space consecutively.    Blocking is used.  The default
>>size
>> used to be 4K, (as seen on a compiler message QRG7086 ?).

Yes,  Thanks I was tired and didn't notice it until I re-read it this
morning.   No K in the Fspec.
So the additional job is to have records physically in order.   But you can
still
block the move from "Memory" to  the "PAG"'s ODP  using SEQONLY(*YES nnn).

John Carr  


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