2026-03-12 20:23:15
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csierra/cs_dba_hist_parameter.sql
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157
csierra/cs_dba_hist_parameter.sql
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----------------------------------------------------------------------------------------
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--
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-- File name: cs_dba_hist_parameter.sql
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--
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-- Purpose: System Parameters History
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--
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-- Author: Carlos Sierra
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--
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-- Version: 2021/12/06
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--
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-- Usage: Execute connected to CDB or PDB
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--
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-- Enter range of dates and filters when requested.
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--
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-- Example: $ sqlplus / as sysdba
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-- SQL> @cs_dba_hist_parameter.sql
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--
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-- Notes: Developed and tested on 12.1.0.2.
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--
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---------------------------------------------------------------------------------------
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--
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@@cs_internal/cs_primary.sql
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@@cs_internal/cs_set.sql
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@@cs_internal/cs_def.sql
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@@cs_internal/cs_file_prefix.sql
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--
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DEF cs_script_name = 'cs_dba_hist_parameter';
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DEF cs_hours_range_default = '1440';
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--
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@@cs_internal/cs_sample_time_from_and_to.sql
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@@cs_internal/cs_snap_id_from_and_to.sql
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--
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COL parameter_name FOR A43;
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COL dist_values FOR 999,990;
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--
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SELECT h.parameter_name, COUNT(DISTINCT h.value) AS dist_values
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FROM dba_hist_parameter h
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WHERE h.dbid = TO_NUMBER('&&cs_dbid.')
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AND h.instance_number = TO_NUMBER('&&cs_instance_number.')
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AND h.snap_id BETWEEN TO_NUMBER('&&cs_snap_id_from.') - 1 AND TO_NUMBER('&&cs_snap_id_to.')
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AND &&cs_con_id. IN (1, h.con_id)
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GROUP BY
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h.parameter_name
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HAVING COUNT(DISTINCT h.value) > 1
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ORDER BY
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h.parameter_name
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/
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PRO
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PRO 3. Parameter Name (opt):
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DEF parameter_name = '&3.';
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UNDEF 3;
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--
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SELECT '&&cs_file_prefix._&&cs_script_name.' cs_file_name FROM DUAL;
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--
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@@cs_internal/cs_spool_head.sql
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PRO SQL> @&&cs_script_name..sql "&&cs_sample_time_from." "&&cs_sample_time_to." "&¶meter_name."
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@@cs_internal/cs_spool_id.sql
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--
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@@cs_internal/cs_spool_id_sample_time.sql
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--
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--@@cs_internal/&&cs_set_container_to_cdb_root.
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--
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PRO PARAMETER : "&¶meter_name."
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--
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PRO
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PRO PARAMETERS CHANGED
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PRO ~~~~~~~~~~~~~~~~~~
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SELECT h.parameter_name, COUNT(DISTINCT h.value) AS dist_values
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FROM dba_hist_parameter h
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WHERE h.dbid = TO_NUMBER('&&cs_dbid.')
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AND h.instance_number = TO_NUMBER('&&cs_instance_number.')
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AND h.snap_id BETWEEN TO_NUMBER('&&cs_snap_id_from.') - 1 AND TO_NUMBER('&&cs_snap_id_to.')
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AND &&cs_con_id. IN (1, h.con_id)
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GROUP BY
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h.parameter_name
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HAVING COUNT(DISTINCT h.value) > 1
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ORDER BY
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h.parameter_name
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/
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COL begin_time FOR A19;
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COL end_time FOR A19;
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COL parameter_name FOR A43;
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COL prior_value FOR A50 HEA 'BEGIN_VALUE';
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COL value FOR A50 HEA 'END_VALUE';
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COL change FOR 999,999,999,999,990 HEA 'NET_CHANGE';
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COL con_id FOR 999990;
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COL pdb_name FOR A30 TRUNC;
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--
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BREAK ON begin_time SKIP PAGE ON end_time;
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--
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PRO
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PRO PARAMETERS CHANGES
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PRO ~~~~~~~~~~~~~~~~~~
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WITH
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parameter_hist AS (
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SELECT /*+ MATERIALIZE NO_MERGE */
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h.snap_id,
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h.dbid,
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h.instance_number,
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h.parameter_name,
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LAG(h.value) OVER (PARTITION BY h.dbid, h.instance_number, h.parameter_name, h.con_id ORDER BY h.snap_id) AS prior_value,
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h.value,
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h.con_id
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FROM dba_hist_parameter h
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WHERE h.dbid = TO_NUMBER('&&cs_dbid.')
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AND h.instance_number = TO_NUMBER('&&cs_instance_number.')
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AND h.snap_id BETWEEN TO_NUMBER('&&cs_snap_id_from.') - 1 AND TO_NUMBER('&&cs_snap_id_to.')
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AND &&cs_con_id. IN (1, h.con_id)
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AND ('&¶meter_name.' IS NULL OR UPPER(parameter_name) = UPPER('&¶meter_name.'))
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),
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parameter_changes AS (
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SELECT /*+ MATERIALIZE NO_MERGE */
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h.snap_id,
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h.dbid,
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h.instance_number,
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h.parameter_name,
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h.prior_value,
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h.value,
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h.con_id,
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s.begin_interval_time,
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s.end_interval_time
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FROM parameter_hist h,
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dba_hist_snapshot s
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WHERE NVL(h.value, '-666') <> NVL(h.prior_value, '-666')
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AND h.snap_id BETWEEN TO_NUMBER('&&cs_snap_id_from.') AND TO_NUMBER('&&cs_snap_id_to.')
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AND s.snap_id = h.snap_id
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AND s.dbid = h.dbid
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AND s.instance_number = h.instance_number
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)
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SELECT CAST(p.begin_interval_time AS DATE) AS begin_time,
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CAST(p.end_interval_time AS DATE) AS end_time,
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p.parameter_name,
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p.prior_value,
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p.value,
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CASE WHEN REGEXP_LIKE(p.prior_value, '^[^a-zA-Z]*$') AND REGEXP_LIKE(p.value, '^[^a-zA-Z]*$') THEN TO_NUMBER(p.value) - TO_NUMBER(p.prior_value) END AS change, -- https://asktom.oracle.com/pls/apex/asktom.search?tag=determine-whether-the-given-is-numeric-alphanumeric-and-hexadecimal
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p.con_id,
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(SELECT c.name AS pdb_name FROM v$containers c WHERE c.con_id = p.con_id) AS pdb_name
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FROM parameter_changes p
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ORDER BY
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p.begin_interval_time,
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p.parameter_name,
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p.con_id
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/
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--
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CLEAR BREAK;
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--
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PRO
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PRO SQL> @&&cs_script_name..sql "&&cs_sample_time_from." "&&cs_sample_time_to." "&¶meter_name."
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--
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@@cs_internal/cs_spool_tail.sql
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--
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--@@cs_internal/&&cs_set_container_to_curr_pdb.
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--
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@@cs_internal/cs_undef.sql
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@@cs_internal/cs_reset.sql
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--
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