added discussion.

diff --git a/ex1/main_4.tex b/ex1/main_4.tex
index 15916dfaa8273905b6297cc20370c67908b34261..c8ca370770bcb72d735b29a9e73ddb1361b47055 100644 (file)
--- a/ex1/main_4.tex
+++ b/ex1/main_4.tex
@@ -101,6 +101,9 @@ Execution time: query-timeout
 \end{verbatim}
 
 
+Changing the create numbers definitely impacts performance. The question is what is part of the assignment and what not.
+
+
 
 \item create indices.
 \begin{verbatim}
@@ -345,4 +348,6 @@ Planning time: 0.978 ms
 Execution time: 2040.407 ms
 \end{verbatim}
 
+We suspect that performance varies likely because the dataset is not a balanced triangle and in some cases results can be discarded earlier. Also resultset deduplication may play a role.
+
 \end{enumerate}