PHP/Apache crashing on script (Segmentation fault (11)
UPDATE3: (Solution)
Persisten option of PDO broke my performance sadly enough.
Found the solution with strace:After running the index on command line with strace (strace php index.php) I found the problem at one of the queries.
After separating the query i replaced my class with default PDO. Adding options of my class till it was broken again:After some more debugging (using PDO instead of my own class) I found out that the problem was setting my own PDO option "ATTR_PERSISTENT => true". Disabling this option solved my problem.