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Problem IC76214
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Status: Geschlossen |
Select from MON_BP_UTILIZATION might return SQL0413N due to overflow in ASYNC_NOT_READ_PERCENT column |
| Produkt: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problembeschreibung: |
The ASYNC_NOT_READ_PERCENT column is calculated as
(unread_prefetch_pages / total_async_reads). In some cases the
accounting of these two counters are incorrect, causing the
ratio to be > 1. This usually happens when a prefetcher
encounters an error during the read request, which causes DB2 to
skip updating the total_async_reads, but not the
unread_prefetch_pages.
This problem usually happens after crash recovery or
rollforward recovery because a prefetcher could encounter errors
trying to prefetch pages that not yet exist. |
| Problem-Zusammenfassung: |
****************************************************************
* USERS AFFECTED: *
* All user *
****************************************************************
* PROBLEM DESCRIPTION: *
* The ASYNC_NOT_READ_PERCENT column is calculated as *
* (unread_prefetch_pages / total_async_reads). In some cases *
* the accounting of these two counters are incorrect, causing *
* the ratio to be > 1. This usually happens when a prefetcher *
* encounters an error during the read request, which causes *
* DB2 to skip updating the total_async_reads, but not the *
* unread_prefetch_pages. *
****************************************************************
* RECOMMENDATION: *
* Upgrade to db2 Version 9.7 FixPak 5 *
**************************************************************** |
| Local-Fix: |
Do not perform a select * from MON_BP_UTILIZATION, skip the
ASYNC_NOT_READ_PERCENT column in the select. |
| verfügbare FixPacks: |
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
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| Lösung |
Problem was first fixed in Version 9.7 FixPak 5 |
| Workaround |
keiner bekannt / siehe Local-Fix |
| Weitere Daten |
Datum - Problem gemeldet :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
| 05.05.2011
23.12.2011
23.12.2011 |
| Problem behoben ab folgender Versionen (IBM BugInfos) |
9.7.
|
| Problem behoben lt. FixList in der Version |
| 9.7.0.5
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