ORA-00020: maximum number of processes (%s) exceeded

SQL> show parameter processes

------------------------------------ ----------- ------------------------------
processes integer 150

SQL> select count(*) from v$process;


SQL> alter system set processes=300 scope=spfile;

System altered.

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup
ORACLE instance started.

SQL> show parameter processes

------------------------------------ ----------- ------------------------------
processes integer 300

Thank you
Osama mustafa

Upgrade to – APPS DBA

On each application tier server node,
shut down all server processes or services.

On the database tier server node,
shut down the database listener in the old Oracle home.

On the database server node,
as the owner of the Oracle 11g file system and database instance, unzip and extract the patch set file for your platform.

Use the runInstaller in the patchset to start the OUI.

Once the OUi starts from the LOV s in the Oracle_home list choose the appropriate one to be upgraded and the location also.

The present oracle_home and its location will appear if the environment is set correctly.

Proceed with the next steps on the OUI screen.

On next Screen it will Say Configuration Assistant has failed.Skip this Step since its not required for Oracle E-Business Suite .

After Installation you need to Apply the RDBMS patches7486407 and 7684818

Copy $APPL_TOP/admin/adstats.sql from the administration server node to the database server node.

$ sqlplus / as sysdba
SQL> shutdown normal;
SQL> startup restrict;
SQL> @adstats.sql
SQL> shutdown normal;
SQL> startup;
SQL> exit;

Thank You
Osama mustafa

steps to upgrade to

O.S : Linux 64Bit
the steps the same for all Database with different patch .
Database : (R1)

Let start upgrading :

1 – You need To install this patch p6890831_111070_Linux-x86-64.zip.
2-   Bring Down Database And Services Down And make sure it .
*Database :
sqlplus / as sysdba
SQL>shutdown immediate ;
$ps -ef | grep pmon “to make sure the database is not running”

Listener :
$lsnrctl status
$lsnrctl stop
$lsnrctl status

3-Just In case Take backup of your database .

4-unzip the patch , and run it under Oracle User 

Select the ORACLE_HOME to upgrade and then click next, the prerequisites steps will complete last click INSTALL. At the end up the installation it will ask to run root.sh as root user. We need root user password or sudo user privilege to run root.sh script.

5-After Upgrade do the following and its mandatory : 
cd $ORACLE_HOME/rdbms/admin
sqlplus  / as sysdba
SQL> startup upgrade;
SQL>spool pre_upgrade.log
SQL> @utlu111i.sql

6-cd $ORACLE_HOME/rdbms/admin
sqlplus / as sysdba
SQL> spool upgrade_date.log
SQL> @catupgrd.sql

Take check the validity, version of the installed components

sqlplus / as sysdba
sql>set pages 250
sql> set lines 1000
sql> col comp_name for a40
sql> select comp_name, version, status from dba_registry;

 7-SQL>shutdown immediate;

8-Recompiling the invalid objects
cd $ORACLE_HOME/rdbms/admin
sqlplus / as sysdba
SQL>spool recompile.log
SQL> @utlrp.sql

Cold Backup Steps for your Database :

Controlfiles, datafiles, redo logs, archive files, tempfiles must be included in the backup. If the files are in different paths, the same has to be backedup.

As Oracle User :

$mkdir /backup_date
$cp /u01/oracle/oradata/orcl/*.* /backup/backup_date
$cd $ORACLE_HOME/dbs
$cp inittest.ora inittest.ora_bkpdate
$cp spfiletest.ora spfiletest.or_bkpdate
$cp orapwtest.ora orapwtest.ora_bkpdate

**Take a backup of home path
$mkdir product_bkp
$cd /u01/oracle/product
$tar czf /backup/oracle_11106.tar.gz 11.1.0

**dbhome, coraenv,oraenv backup
As Root User :

#cd /usr/local/bin
#cp dbhome dhome_bkpdate
#cp coraenv coraenv_bkpdate
#cp oraenv oraenv_bkpdate

revert back to old version  :

1. untar the binary backup
2. Backup  the current database and then replace them with cold back taken before applying the patch.

 As Root User :

cd /usr/local/bin
#cp dbhome_bkpdate dbhome
#cp coraenv_bkpdate coraenv
#cp oraenv_bkpdate oraenv

 As Oracle User :
oracle binary restoration
cd /u01/oracle/product
$rm -rf 11.1.0
$mkdir 11.1.0
$cp /backup/oracle_11106.tar.gz 11.1.0
$cd 11.1.0
$gunzip oracle_11106.tar.gz
$tar -xvf oracle_11106.tar

Datafile backup restoration
cd /u01/oracle/oradata/orcl/
$rm *
$cd /backup/backup_date
$cp *.* /App1/oracle/oradata/orcl/
$cd $ORACLE_HOME/dbs
$cp inittest.ora_bkpdate inittest.ora
$cp spfiletest.ora_bkpdate spfiletest.ora
$cp orapwtest.ora_bkpdate orapwtest.ora

 sqlplus / as sysdba
SQL>select * from v$version;
SQL>select comp_name, version, status from dba_registry;

Osama mustafa