2026-03-12 21:01:38

ASPM/aspm_01.md

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+set lines 256
+
+column client_name format a35
+column task_name format a30
+
+column last_try_date format a20
+column last_good_date format a20
+column next_try_date format a20
+
+alter session set nls_timestamp_format = 'yyyy-mm-dd hh24:mi:ss';
+
+select 
+	client_name, task_name, status, 
+	to_char(last_try_date,'yyyy-mm-dd hh24:mi:ss') as last_try_date,
+	to_char(last_good_date,'yyyy-mm-dd hh24:mi:ss') as last_good_date,
+	to_char(next_try_date,'yyyy-mm-dd hh24:mi:ss') as next_try_date
+from dba_autotask_task;
+
+
+
+SQL> show parameter optimizer%baselines
+
+NAME                                 TYPE        VALUE
+------------------------------------ ----------- ------------------------------
+optimizer_capture_sql_plan_baselines boolean     FALSE
+optimizer_use_sql_plan_baselines     boolean     TRUE
+
+
+
+
+set lines 200
+set pages 1000
+col parameter_name for a35
+col parameter_value for a30
+col last_modified for a30
+col modified_by for a30
+
+select * from  dba_sql_management_config where parameter_name like 'AUTO_SPM_EVOLVE_TASK%';
+
+
+
+exec dbms_spm.configure('AUTO_SPM_EVOLVE_TASK','ON');
+exec dbms_spm.configure('AUTO_SPM_EVOLVE_TASK','OFF');
+
+The list of tunable parameters with DBMS_SPM.CONFIGURE:
+
+col description FOR a40 word_wrapped
+SET pages 1000
+
+select parameter_name, parameter_value, description
+     from   dba_advisor_parameters
+     where  task_name = 'SYS_AUTO_SPM_EVOLVE_TASK'
+     and    parameter_value != 'UNUSED';
+ 
+
+
+set lines 256
+
+col DBID noprint
+col TASK_ID noprint
+col TASK_NAME noprint
+
+select *
+     from   dba_autotask_schedule_control
+     where  dbid = sys_context('userenv','con_dbid')
+     and    task_name = 'Auto SPM Task';
+
+-- last task details
+SET LONG 1000000 PAGESIZE 1000 LONGCHUNKSIZE 256 LINESIZE 256
+
+SELECT DBMS_SPM.report_auto_evolve_task
+FROM   dual;
+
+
+CREATE TABLE test1(id NUMBER, descr VARCHAR(50)) TABLESPACE users;
+
+DECLARE
+i NUMBER;
+nbrows NUMBER;
+BEGIN
+  i:=1;
+  nbrows:=50000;
+  LOOP
+    EXIT WHEN i>nbrows;
+    IF (i=1) THEN
+      INSERT INTO test1 VALUES(1,RPAD('A',49,'A'));
+    ELSE
+      INSERT INTO test1 VALUES(nbrows,RPAD('A',49,'A'));
+    END IF;
+    i:=i+1;
+  END LOOP;
+  COMMIT;
+END;
+/
+
+CREATE INDEX test1_idx_id ON test1(id) TABLESPACE users;
+
+ 
+EXEC DBMS_STATS.GATHER_TABLE_STATS(ownname=>user, tabname=>'test1', estimate_percent=>NULL, method_opt=>'FOR ALL INDEXED COLUMNS SIZE 2');
+
+
+ALTER SYSTEM flush shared_pool;
+
+SELECT /*+ GATHER_PLAN_STATISTICS */ * FROM test1 WHERE id=1;
+
+SELECT sql_id,child_number,plan_hash_value,is_bind_sensitive,is_bind_aware,is_shareable,is_obsolete,sql_plan_baseline
+     FROM v$sql
+     WHERE sql_id='4q7zcj8kp9q2r';
+
+
+EXEC DBMS_STATS.GATHER_TABLE_STATS(ownname=>user, tabname=>'test1', estimate_percent=>NULL, method_opt=>'FOR ALL INDEXED COLUMNS SIZE 1');
+
+
+SELECT
+       plan_hash_value,
+       cpu_time,
+       buffer_gets,
+       disk_reads,
+       direct_writes,
+       rows_processed,
+       fetches,
+       executions,
+       optimizer_cost,
+       TO_CHAR(plan_timestamp,'dd-mon-yyyy hh24:mi:ss') AS plan_timestamp
+     FROM dba_sqlset_statements
+     WHERE sqlset_name='SYS_AUTO_STS'
+     AND sql_id='4q7zcj8kp9q2r'
+     ORDER BY plan_timestamp DESC;
+
+
+select * from SYS.WRI$_ADV_EXECUTIONS where exec_type='SPM EVOLVE' order by exec_start desc;
+
+select * from SYS.WRI$_ADV_EXECUTIONS where exec_type='SPM EVOLVE' 
+where exec_start between date'2025-05-25 09:00:00' and date'2025-05-25 19:00:00'
+order by exec_start desc;
+     
+
+
+select 
+   sql_id
+  ,plan_hash_value
+  ,LAST_MODIFIED
+from(
+select 
+  dbms_sql_translator.sql_id(sql_text) sql_id,
+  (select to_number(regexp_replace(plan_table_output,'^[^0-9]*')) 
+  from table(dbms_xplan.display_sql_plan_baseline(sql_handle,plan_name)) 
+  where plan_table_output like 'Plan hash value: %') plan_hash_value,
+  bl.*
+from dba_sql_plan_baselines bl 
+)
+;