0C4 or 0C6 abend in FASTSCAN collection
Article ID: 271242
Updated On:
Products
Issue/Introduction
Extract Procedures may abend with either an S0C4 or S0C6.
SYSTEM COMPLETION CODE=0C4 REASON CODE=00000010
TIME=13.48.27 SEQ=08386 CPU=0000 ASID=00CA
PSW AT TIME OF ERROR 078C2000 C040C3C8 ILC 2 INTC 10
NO ACTIVE MODULE FOUND
NAME=UNKNOWN
SYSTEM COMPLETION CODE=0C6 REASON CODE=00000006
TIME=13.23.10 SEQ=20210 CPU=0000 ASID=021E
PSW AT TIME OF ERROR 078C2000 A51F973B ILC 2 INTC 06
NO ACTIVE MODULE FOUND
NAME=UNKNOWN
The abend occurs during collection processing for a FASTSCAN and one of the following messages is issued for the object being processed.
Collection of XP - creator.indexname - Abend0C4
Collection of XP - creator.indexname - Abend0C6
The following messages may also be issued.
Storage acquisition failed processing RALSIX2
Collection of XP - creator.indexname - RC0016
When the job is restarted it completes successfully.
Environment
Release : 20.0
Cause
The FASTSCAN is requesting too much storage.
Resolution
Review the Fastscan settings, in particular the number of Buffers and Scans.
COLLECTION - FASTSCAN
STATS ID: ssid BUFFERS: 0480 ERRORS : 0001
WTOR CD : 00 SCAN : 0010 ACCESS : V/EXCP
The recommended setting for the number of scans is between 3 and 5.
The recommended setting for the Buffers is dependent on the DASD device but this would normally be 360 at the most.
The number of buffers requested affects the amount of memory needed for the extract. The more buffers you assign, the less physical I/O Database Analyzer performs.
Entering a high number of scans does not reduce CPU time, but could reduce elapsed time. Scan values above 5 can severely impact other address spaces depending on hardware and software limitations, current workload, and so forth.
In this particular job, with Buffers set to 480, and Scan set to 10, (10*480) buffers are allocated.
To reduce the amount of virtual storage required for the extract and to resolve the problem:
1. Reduce the buffer amount from 480 to 360
2. Reduce the number of scans from 10 to 5
If this does not work, reduce them further.
Note reducing these values will have a negative impact on the elapsed time.
Additional Information
For further details please refer to Techdocs.
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