--- a/geo-backend/ChangeLog	Tue Jan 26 13:55:55 2010 +0000
+++ b/geo-backend/ChangeLog	Tue Jan 26 16:33:36 2010 +0000
@@ -1,3 +1,25 @@
+2009-01-25	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	Fix for gnv/issue107
+
+	* src/main/java/de/intevation/gnv/geobackend/util/RedundancyRemover.java:
+	  New. Used to reduce the redundancy of data in SQL result sets. Column
+	  values are very distinct so the degree or redundancy is very high. E.g 
+	  the SDE produces for each date value a java.util.GregorianCalendar object
+	  which are very heavy weighted. We only use them r/o so we can hash each date 
+	  value to one unique representative. Same logic applys to integer values 
+	  and so on.
+	  
+	  With this technique we are able to reduce the memory consumption by
+	  over 90%. Because it is not very feasible to store the whole history
+	  of column we only have a limited number of cached values per column.
+	  This is controlled via the system property
+	  "de.intevation.gnv.geobackend.util.RedundancyRemover.lookback" which
+	  defaults to 1029.
+
+	* src/main/java/de/intevation/gnv/geobackend/sde/datasources/ArcSDEStatement.java:
+	  Use RedundancyRemovers to filter the incoming traffic from SDE.
+
 2010-01-26  Tim Englich  <tim.englich@intevation.de>
 
 	* src/test/java/de/intevation/gnv/geobackend/base/query/ToCharSample.java :