update : 28-06-2017

DBA Script : perf_top_sql_by_buffer_gets.sql

-- | FILE : perf_top_sql_by_buffer_gets.sql |
-- +----------------------------------------------------------------------------+
-- | |
-- | |
-- | www.high-oracle.com |
-- |----------------------------------------------------------------------------|
-- | www.high-oracle.com |
-- |----------------------------------------------------------------------------|
-- | DATABASE : Oracle |
-- | FILE : perf_top_sql_by_buffer_gets.sql |
-- | CLASS : Tuning |
-- | PURPOSE : Report on top SQL statements ordered by most buffer gets. |
-- | NOTE : As with any code, ensure to test this script in a development |
-- | environment before attempting to run it in production. |
-- +----------------------------------------------------------------------------+
SET LINESIZE 145
SET PAGESIZE 9999
SET VERIFY off
COLUMN username FORMAT a18 HEADING 'Username'
COLUMN buffer_gets FORMAT 999,999,999,999,999 HEADING 'Buffer Gets'
COLUMN executions FORMAT 999,999,999,999,999 HEADING 'Executions'
COLUMN gets_per_exec FORMAT 999,999,999,999,999 HEADING 'Gets / Executions'
COLUMN sql HEADING 'SQL Statement'
BREAK ON report
COMPUTE sum OF buffer_gets ON report
COMPUTE sum OF executions ON report
COMPUTE sum OF gets_per_exec ON report
prompt
prompt =============================================
prompt SQL with buffer gets greater than 1000
prompt =============================================
SELECT
UPPER(b.username) username
, a.buffer_gets buffer_gets
, a.executions executions
, a.buffer_gets / decode(a.executions, 0, 1, a.executions) gets_per_exec
, sql_text || chr(10) || chr(10) sql
FROM
sys.v_$sqlarea a
, dba_users b
WHERE
a.parsing_user_id = b.user_id
AND a.buffer_gets > 1000
AND b.username NOT IN ('SYS','SYSTEM')
ORDER BY
buffer_gets desc;

End Script

Oracle Database Error Messages



Oracle Database High Availability Any organization evaluating a database solution for enterprise data must also evaluate the High Availability (HA) capabilities of the database. Data is one of the most critical business assets of an organization. If this data is not available and/or not protected, companies may stand to lose millions of dollars in business downtime as well as negative publicity. Building a highly available data infrastructure is critical to the success of all organizations in today's fast moving economy.

Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.