oracle XE “cannot access http://127.0.0.1:8080/apex”

December 26, 2008 · Posted in linux, oracle · Comment 

I had installed oracle XE on CentOS and was not able to connect to web admin for past two days. Finally after a long two days of search, found this.

Thanks!

Recover MySQL root password

December 26, 2008 · Posted in mysql · Comment 

You can recover MySQL database server password with following five easy steps.
Step # 1: Stop the MySQL server process.
Step # 2: Start the MySQL (mysqld) server/daemon process with the –skip-grant-tables option so that it will not prompt for password
Step # 3: Connect to mysql server as the root user
Step # 4: Setup new root password
Step # 5: Exit and restart MySQL server

Here are commands you need to type for each step (login as the root user):
Step # 1 : Stop mysql service
# /etc/init.d/mysql stop
Output:
Stopping MySQL database server: mysqld.

Step # 2: Start to MySQL server w/o password:
# mysqld_safe --skip-grant-tables &
Output:
[1] 5988
Starting mysqld daemon with databases from /var/lib/mysql
mysqld_safe[6025]: started

Step # 3: Connect to mysql server using mysql client:
# mysql -u root
Output:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1 to server version: 4.1.15-Debian_1-log

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.

mysql>

Step # 4: Setup new MySQL root user password
mysql> use mysql;
mysql> update user set password=PASSWORD("NEW-ROOT-PASSWORD") where User='root';
mysql> flush privileges;
mysql> quit

Step # 5: Stop MySQL Server:
# /etc/init.d/mysql stop
Output:
Stopping MySQL database server: mysqld
STOPPING server from pid file /var/run/mysqld/mysqld.pid
mysqld_safe[6186]: ended

[1]+ Done mysqld_safe –skip-grant-tables

Step # 6: Start MySQL server and test it
# /etc/init.d/mysql start
# mysql -u root -p

original post

Oracle XE Tuning

December 4, 2008 · Posted in oracle · Comment 

In order to use Oracle XE under normal load, database sessions and processes need to be increased. This could be some as follows:

SQL> show parameters sessions
SQL> alter system set sessions=250 scope=spfile;

SQL> show parameters processes
SQL> alter system set processes=200 scope=spfile;

In case you are unable to access apex website remotely, run the following command as sys
exec dbms_xdb.setListenerLocalAccess(false);