Re: MVT COBOL under MVS3.8j.

On Thu, 12 Sep 2019, Gary [email protected] [H390-MVS] wrote:

> OK, I did some "light" reading of the 
> LY28-6486-2_OS_VS_COBOL_Compiler_Rel_2_PLM manual.  Fun stuff. The XREF 
> listing is produced by Phase 6A (pgs 190 & 191).  Of interest is that if XREF 
> was specified, then Phase 6A uses the GETALL routine in the TAMER to get all 
> available storage...
>
> Going back to GC28-6399-2.  There are 3 parameters of interest. The JCL 
> REGION, COBOL SIZE and COBOL BUF.  Appendix D is of informative reading if 
> you what all of the facts.  Here is the short version, COBOL SIZE is the 
> maximum amount of storage to be used by the compiler.  COBOL BUF is the 
> amount of storage to use from SIZE for use by I/O file buffers and the like.  
> The JCL REGION value must be 6K greater than the COBOL SIZE value. Appendix D 
> has a nice long formula for calculating the necessary memory required by the 
> compiler.  The key information is that the resident phase 00 takes 80K and 
> the minimum buffer size is 2768 BYTES.
>
> Peppe's TK4- values where 9M for REGION, 8192K for SIZE and 2048K for BUF.  
> There is a large difference between 2768 bytes and 2097152 bytes (2M).
>
> I would suggest that Peppe overide the COBOL BUF to be 4096K or don't specify 
> it at all and let the compiler calculate the required size for the buffer 
> pool.  Using a quarter of the available REGION for buffers seems to be a 
> waste.  The SIZE parm could also be bumped up to 9M - 6K to get a little more 
> room.
>
> If it still fails, then a more detailed reading of the Logic Manual and of 
> memory management modules for MVS and MVT to look for differences.
>
> Hope this helps.
>
> Gary
>
One word for all the "valuable" informations provided
in the previous posts to my question: THANKS!

A big THANK YOU to all!

I'll try to read the manual and to experiment
with these values.

Peppe.