Changeset: b69c0857e5d1 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/b69c0857e5d1
Modified Files:
sql/backends/monet5/bin_partition_by_slice.c
Branch: default
Log Message:
it takes some cache misses before the extra cost of partitioning pays off.
diffs (12 lines):
diff --git a/sql/backends/monet5/bin_partition_by_slice.c
b/sql/backends/monet5/bin_partition_by_slice.c
--- a/sql/backends/monet5/bin_partition_by_slice.c
+++ b/sql/backends/monet5/bin_partition_by_slice.c
@@ -868,7 +868,7 @@ rel_groupby_partition(mvc *sql, sql_rel
}
if (card < estimate)
estimate = card;
- if ((BUN)estimate >= 4*GDKL3_size)
+ if ((BUN)estimate >= 16*GDKL3_size)
return true;
return false;
}
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