{"id":11719,"date":"2019-04-29T08:06:44","date_gmt":"2019-04-29T08:06:44","guid":{"rendered":"https:\/\/dbtut.com\/?p=11719"},"modified":"2019-04-29T08:06:44","modified_gmt":"2019-04-29T08:06:44","slug":"hidden-parameters-in-oracle-database","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2019\/04\/29\/hidden-parameters-in-oracle-database\/","title":{"rendered":"Hidden Parameters in Oracle Database"},"content":{"rendered":"

There are many hidden parameters in Oracle databases. These parameters should be changed if required by Oracle. Unconscious change of these parameters can be a problem.<\/p>\n

We can learn the hidden parameters and their current values \u200b\u200bwith the following query.<\/p>\n

SQL> set lines 1000\nSQL> column name format a40\nSQL> column value format a15\nSQL> column default_val format a6\nSQL> column type format a20\nSQL> column description format a50\nSQL>  SELECT a.ksppinm name,\n         b.ksppstvl value,\n         b.ksppstdf default_val,\n         DECODE (a.ksppity,\n                 1, 'boolean',\n                 2, 'string',\n                 3, 'number',\n                 4, 'file',\n                 a.ksppity)\n            type,\n         a.ksppdesc description\n    FROM sys.x$ksppi a, sys.x$ksppcv b\n   WHERE a.indx = b.indx AND a.ksppinm LIKE '\\_%' ESCAPE '\\'\nORDER BY name;<\/pre>\n
You can change the hidden parameters as follows.<\/p>\n
SQL> alter system set \"_parameter_name\"=value scope=spfile sid='*';<\/pre>\n\n
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There are many hidden parameters in Oracle databases. These parameters should be changed if required by Oracle. Unconscious change of these parameters can be a problem. We can learn the hidden parameters and their current values \u200b\u200bwith the following query. SQL> set lines 1000 SQL> column name format a40 SQL> column value format a15 SQL> …<\/p>\n
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