DB2 - Problembeschreibung
Problem IT05273 | Status: Geschlossen |
INTERMITTENT SLOW PERFORMANCE FOR QUERIES ON COLUMN BASED TABLES WITH COUNT(DISTINCT X ) | |
Produkt: | |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 | |
Problembeschreibung: | |
You may find that when you run a query with with Count(Distinct x ) against a column based table that you get intermittent slow performance for the query. For example, for the query: select count(distinct id) from test where date > '2014-04-20'; run against a table with 130 million rows that normal takes 5 seconds to run you will intermittently find that the query takes greater than 40 seconds. | |
Problem-Zusammenfassung: | |
**************************************************************** * USERS AFFECTED: * * All Column Based table users * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade to DB2 LUW 10.5 Fix Pack 5 * **************************************************************** | |
Local-Fix: | |
Lösung | |
First fixed in DB2 LUW 10.5 Fix Pack 5 | |
Workaround | |
keiner bekannt / siehe Local-Fix | |
Weitere Daten | |
Datum - Problem gemeldet : Datum - Problem geschlossen : Datum - der letzten Änderung: | 30.10.2014 19.01.2016 19.01.2016 |
Problem behoben ab folgender Versionen (IBM BugInfos) | |
Problem behoben lt. FixList in der Version | |
10.5.0.7 |