Changeset: a0626b9b41a7 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=a0626b9b41a7
Modified Files:
        gdk/gdk_private.h
Branch: Jul2015
Log Message:

Disable parent hash for now.
It seems that with larger datasets the size of the hash on the parent
bat has a deleterious effect on query speed since the bigger hash
might then not fit in memory.


diffs (12 lines):

diff --git a/gdk/gdk_private.h b/gdk/gdk_private.h
--- a/gdk/gdk_private.h
+++ b/gdk/gdk_private.h
@@ -12,7 +12,7 @@
 #error this file should not be included outside its source directory
 #endif
 
-/* #define DISABLE_PARENT_HASH 1 */
+#define DISABLE_PARENT_HASH 1
 
 #include "gdk_system_private.h"
 
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