SEQPDL parameter: Difference between revisions

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<dd>4096
<dd>4096
<dt>Parameter type
<dt>Parameter type
<dd>System
<dd>Utable
<dt>Where set
<dt>Where set
<dd>User 0 parameter line
<dd>On user's parameter line or reset by UTABLE command
<dt>Related products
<dt>Related products
<dd>All
<dd>All
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List in order for the SOUL sequencer to proceed with the next             
List in order for the SOUL sequencer to proceed with the next             
quad code.                                                                 
quad code.                                                                 
The new default is 4096 bytes.  The old value was 1024 bytes.           
The minumum and default value is 4096 bytes.  The maximum             
The maximum value is 8192 bytes.                                        
value is 8192 bytes. SEQPDL is a user resettable parameter and can  
SEQPDL is a system level                                                 
be set on the user's parameter line or may be reset by the UTABLE     
parameter and can only be set on User 0's parameter line.                
command.                                                             
This parameter allows enough PDL space in order for                     
The old value was 1024 and was a hardcoded internally in the Model204 
the lower level journaling routines to handle error conditions          
nucleus. With 1024 bytes there were edge cases where abends would   
properly without breaking files.  
break files.  This is an attempt to allow enough PDL space so that   
all of the lower level journaling routines can process error          
conditions without breaking files.                                    
                                                                                                              
                                                                                                              
SEQPDL might require you to increase                                 
SEQPDL might require you to increase                                 

Revision as of 19:01, 3 September 2013

Minimum PDL available for sequencer

Summary

Default value
4096
Parameter type
Utable
Where set
On user's parameter line or reset by UTABLE command
Related products
All
Introduced
Model 204 version 7.5

Description

The SEQPDL parameter controls the amount of free space that must be present in the user's Push Down List in order for the SOUL sequencer to proceed with the next quad code. The minumum and default value is 4096 bytes. The maximum value is 8192 bytes. SEQPDL is a user resettable parameter and can be set on the user's parameter line or may be reset by the UTABLE command. The old value was 1024 and was a hardcoded internally in the Model204 nucleus. With 1024 bytes there were edge cases where abends would break files. This is an attempt to allow enough PDL space so that all of the lower level journaling routines can process error conditions without breaking files.

SEQPDL might require you to increase the size of the user Push Down List (UTABLE LPDLST parameter) by up to 3072 bytes, or more if you specify a value for SEQPDL that is larger than the 4096 default value. This increase should avoid any issues associated with ERROR 2126 USER'S PUSHDOWN LIST OVERFLOWED.

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