I'm getting a segmentation fault when I run the program below with amd64 java rc1. I've tried both the jdk and jre. The program fetchs a faily large result set from a database. I execute it with the following command:
java -Xmx1000m -cp mysql.jar:. Test
If I use -Xmx500m then it works, but I really need a
larger heap.
I'm using Suse 9.0 professional on a dual opteron 240
system with 4gb ram. I'm running the latest updates
from the suse online update program. The kernel is
2.4.21-178-smp.
Just wondering if this is reproducable with anyone
else's amd64 system. I dont have problems with
anything else so I believe my system hardware to be
ok.
If anyone has any sugestions or needs further info let
me know.
Also, on a very good note, I have performance tested
the amd64 rc1 and it is over 30% faster with one of my
programs. This is great work. I'm very much looking
forward to using JNI and large heaps with amd64 java.
Frank
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class Test {
public Test(String[] args) throws Exception {
String url = "jdbc:mysql://suse:3306/";
String user = "root";
String pass = "";
String sql = "select * from wow.cb2003 limit
100000";
int count = 0;
System.out.println("Starting.");
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection con =
DriverManager.getConnection(url, user, pass);
for (int x = 0; x < 10; x++) {
System.out.println("X: " + x);
Statement stmt = con.createStatement();
ResultSet result = stmt.executeQuery(sql);
while (result.next()) {
++count;
}
result.close();
stmt.close();
result = null;
stmt = null;
}
System.out.println("Done: " + count);
}
public static void main(String[] args) throws
Exception {
new Test(args);
}
}
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