PLSQL_统计信息系列10_统计信息过旧导致程序出现性能问题

select sid, sql_id from v$session where sid = 1001

select b.begin_interval_time, 
       a.disk_reads_total, 
       a.buffer_gets_total,
       a.buffer_gets_delta, 
       a.rows_processed_total, 
       a.plan_hash_value
  from dba_hist_sqlstat a, dba_hist_snapshot b  
 where a.snap_id = b.snap_id 
 and sql_id = '466bpq7055f4c' 
order by 1 desc; 

select* from v$sql_plan

select name, last_analized from dba_tables

exec dbms_stats.gather_table_stats(
            ownname=>'SCOT',
 tabname=>'GAVIN',
 estimate_percent=>3,
 degree=>32,
 granularity=>'GLOBAL',
 cascade=>FALSE,
 no_invalidate=>FALSE);

  SELECT DBMS_LOB.SUBSTR (sql_text, 100, 1) SQL_SHORT,
         tab1.sql_id,
         DBMS_LOB.getlength (sql_text) SQL_Len,
         ROUND (TOTAL_WAIT / 1000000, 2) TOTAL_WAIT_SECS, ROUND (ELAPSED_TIME_DELTA / 1000000, 2) TOTAL_TIME_SECS, TO_CHAR (BEGIN_INTERVAL_TIME, 'DAY', 'NLS_DATE_LANGUAGE=AMERICAN') Week_Day, BEGIN_INTERVAL_TIME, END_INTERVAL_TIME, EXEC_COUNT, AVG_CPU_TIME_SECS, AVG_ELAPSED_SECS, ROUND (ELAPSED_TIME_DELTA / 1000000, 0) ELAPSED_TIME_DELTA, ROUND (AVG_ROWS_PROCESSED, 1) AVG_ROWS_PROCESSED, PLAN_HASH_VALUE, MODULE, ACTION, PARSING_SCHEMA_NAME, (SELECT username FROM dba_users WHERE user_id = PARSING_USER_ID) PARSING_USER, AVG_BUFFER_GETS, AVG_DISK_READS, AVG_IOWAIT AVG_iowai_secs, AVG_CCWAIT AVG_ccwait_secs, AVG_CLWAIT AVG_clwait_secs, AVG_APWAIT AVG_apwait_secs, AVG_PX_SERVERS, AVG_PARSE_CALLS, tab1.SNAP_ID, tab1.INSTANCE_NUMBER, AVG_CELL_UNCOMPRESSED_BYTES, AVG_DIRECT_WRITES, AVG_IO_INTERCONNECT_BYTES, AVG_IO_OFFLOAD_ELIG_BYTES, AVG_IO_OFFLOAD_RETURN_BYTES, AVG_JAVEXEC_TIME, AVG_OPTIMIZED_PHYSICAL_READS, AVG_PLSEXEC_TIME_DELTA, AVG_SORTS_DELTA, -- BIND_DATA, -- -- (Falta arreglar) listagg( (select * from table(dbms_sqltune.extract_binds(bind_data)), '#') WITHIN GROUP (ORDER BY 1)) Binds , DBMS_LOB.SUBSTR (sql_text, 2000, 1) SQL_TEXT1, DBMS_LOB.SUBSTR (sql_text, 2000, 2001) SQL_TEXT2, DBMS_LOB.SUBSTR (sql_text, 2000, 4001) SQL_TEXT3, DBMS_LOB.SUBSTR (sql_text, 2000, 6001) SQL_TEXT4, DBMS_LOB.SUBSTR (sql_text, 2000, 8001) SQL_TEXT5, DBMS_LOB.SUBSTR (sql_text, 2000, 10001) SQL_TEXT6, DBMS_LOB.SUBSTR (sql_text, 2000, 12001) SQL_TEXT7, DBMS_LOB.SUBSTR (sql_text, 2000, 14001) SQL_TEXT8, DBMS_LOB.SUBSTR (sql_text, 2000, 16001) SQL_TEXT9, DBMS_LOB.SUBSTR (sql_text, 2000, 18001) SQL_TEXT10 FROM DBA_HIST_SQLTEXT D, DBA_HIST_SNAPSHOT N, ( SELECT S.SQL_ID SQL_ID, instance_number, SUM (EXECUTIONS) EXEC_COUNT, ROUND ( (SUM (CPU_TIME_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_CPU_TIME_SECS, ROUND ( (SUM (ELAPSED_TIME_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_ELAPSED_SECS, SUM (ELAPSED_TIME_DELTA) ELAPSED_TIME_DELTA, ROUND ( (SUM (ROWS_PROCESSED_DELTA) / SUM (EXECUTIONS)), 4) AVG_ROWS_PROCESSED, PLAN_HASH_VALUE, MODULE, ACTION, PARSING_SCHEMA_NAME, PARSING_USER_ID, ROUND (SUM (BUFFER_GETS_DELTA) / SUM (EXECUTIONS), 4) AVG_BUFFER_GETS, ROUND (SUM (DISK_READS_DELTA) / SUM (EXECUTIONS), 0) AVG_DISK_READS, SNAP_ID, ROUND ( (SUM (IOWAIT_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_IOWAIT, ROUND ( (SUM (CCWAIT_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_CCWAIT, ROUND ( (SUM (CLWAIT_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_CLWAIT, ROUND ( (SUM (APWAIT_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) AVG_APWAIT, ROUND (SUM (PX_SERVERS_EXECS_DELTA) / SUM (EXECUTIONS), 4) AVG_PX_SERVERS, ROUND (SUM (PARSE_CALLS_DELTA) / SUM (EXECUTIONS), 4) AVG_PARSE_CALLS, ROUND (SUM (CELL_UNCOMPRESSED_BYTES_DELTA) / SUM (EXECUTIONS), 4) AVG_CELL_UNCOMPRESSED_BYTES, ROUND (SUM (DIRECT_WRITES_DELTA) / SUM (EXECUTIONS), 4) AVG_DIRECT_WRITES, ROUND (SUM (IO_INTERCONNECT_BYTES_DELTA) / SUM (EXECUTIONS), 4) AVG_IO_INTERCONNECT_BYTES, ROUND (SUM (IO_OFFLOAD_ELIG_BYTES_DELTA) / SUM (EXECUTIONS), 4) AVG_IO_OFFLOAD_ELIG_BYTES, ROUND (SUM (IO_OFFLOAD_RETURN_BYTES_DELTA) / SUM (EXECUTIONS), 4) AVG_IO_OFFLOAD_RETURN_BYTES, ROUND (SUM (JAVEXEC_TIME_DELTA) / SUM (EXECUTIONS), 4) AVG_JAVEXEC_TIME, ROUND ( SUM (OPTIMIZED_PHYSICAL_READS_DELTA) / SUM (EXECUTIONS), 4) AVG_OPTIMIZED_PHYSICAL_READS, ROUND (SUM (PLSEXEC_TIME_DELTA) / SUM (EXECUTIONS), 4) AVG_PLSEXEC_TIME_DELTA, ROUND (SUM (SORTS_DELTA) / SUM (EXECUTIONS), 4) AVG_SORTS_DELTA, SUM ( IOWAIT_DELTA + CCWAIT_DELTA + CLWAIT_DELTA + APWAIT_DELTA) TOTAL_WAIT, MAX (BIND_DATA) BIND_DATA FROM (SELECT S.*, DECODE (EXECUTIONs_DELTA, 0, 1, EXECUTIONS_DELTA) EXECUTIONS FROM DBA_HIST_SQLSTAT S) S WHERE 1 = 1 -- and ( PARSING_SCHEMA_NAME like 'EUS%' ) -- Filter by schema name GROUP BY S.SQL_ID, instance_number, S.SNAP_ID, PLAN_HASH_VALUE, MODULE, ACTION, PARSING_SCHEMA_NAME, S.INSTANCE_NUMBER, PARSING_USER_ID HAVING ROUND ( (SUM (ELAPSED_TIME_DELTA) / SUM (EXECUTIONS)) / 1000000, 4) >= 10 -- Filter >= n secs ORDER BY 5 DESC) TAB1 WHERE D.SQL_ID = TAB1.SQL_ID AND TAB1.snap_id = N.snap_id -- and upper(tab1.module) like '%PKG_BATCH_PROCESSES_SDM%' AND d.sql_id IN ('6tmcqrydfgdtc') -- AND D.SQL_ID in ( select distinct sql_id from DBA_HIST_ACTIVE_SESS_HISTORY where top_level_sql_id = '85xkhugz5kt8h' ) -- AND upper(DBMS_LOB.SUBSTR (sql_text, 100, 1)) LIKE 'INSERT%' -- AND upper(DBMS_LOB.SUBSTR (sql_text, 1000, 1)) LIKE 'SELECT%' -- AND upper(DBMS_LOB.SUBSTR (sql_text, 3000, 1)) LIKE '%INACTIVE%' AND BEGIN_INTERVAL_TIME > SYSDATE - 60 -- and BEGIN_INTERVAL_TIME between to_date('05/09/2013 07:50:00', 'DD/MM/YYYY hh24:mi:ss') AND to_date('05/09/2013 16:10:00', 'DD/MM/YYYY hh24:mi:ss') -- and BEGIN_INTERVAL_TIME >= (SELECT job_start_datetime - (2/24) FROM job_status WHERE job_name = 'RAVLDBSK' AND cob_date = (SELECT current_cob_date FROM eus_cob)) -- and BEGIN_INTERVAL_TIME <= (SELECT job_end_datetime + (2/24) FROM job_status WHERE job_name = 'RAVLDBSK' AND cob_date = (SELECT current_cob_date FROM eus_cob)) -- order by AVG_ELAPSED_SECS DESC -- order by ELAPSED_TIME_DELTA DESC ORDER BY BEGIN_INTERVAL_TIME DESC -- order by TOTAL_WAIT_SECS desc；