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Query to check the OPTIMAL UNDO RETENTION _____________________________________________________________________________ SELECT d.undo_size / (1024 * 1024) "ACTUAL UNDO SIZE [MByte]",        SUBSTR(e.value, 1, 25) "UNDO RETENTION [Sec]",        ROUND((d.undo_size / (to_number(f.value) * g.undo_block_per_sec))) "OPTIMAL UNDO RETENTION [Sec]"   FROM (SELECT SUM(a.bytes) undo_size           FROM v$datafile a, v$tablespace b, dba_tablespaces c          WHERE c.contents = 'UNDO'            AND c.STATUS = 'ONLINE'            AND b.name = c.tablespace_name            AND a.ts# = b.ts#) d,        v$parameter e,        v$parameter f,        (SELECT MAX(undoblks / ((end_time - begin_time) * 3600 * 24)) undo_block_per_sec  ...

10g Release 2 (10.2.0.5) Patch Set 4 for Solaris Operating System (x86-64) PART ONE: Applying Patch___________________________________________________ Step 1:  Shut Down Oracle Databases SQL> shutdown immediate;  Shut down any existing Oracle Database instances with normal or immediate priority. On Oracle RAC systems, shut down all instances on each node. Step 2: Stopping All Processes for a Single Instance Installation Shut down the following Oracle Database 10g processes in the order specified before installing the patch set:  Shut down all processes in the Oracle home that might be accessing a database; for example, Oracle Enterprise Manager Database Control: $ emctl stop dbconsole $ lsnrctl stop Step 3: To install the Oracle Database 10g patch set interactively: a. Log in as the oracle user. b. Enter the following commands to start Oracle Universal Installer, where patchset_directory is the directory where you unpac...