Hi Guy's,
Please find below script which retrieves historical execution data and execution plans for a specific SQL statement using the Automatic Workload Repository (AWR) views.
SQL Performance History Report for an Oracle Database. It
set echo off
set feedback off timing off verify off pagesize 100 linesize 200 recsep off echo off
set serveroutput on size 1000000 format wrapped trimout on trimspool on
col phv heading "Plan|Hash Value"
col snap_time format a12 truncate heading "Snapshot|Time"
col execs format 999,990 heading "Execs"
col lio_per_exec format 999,999,999,990.00 heading "Avg LIO|Per Exec"
col pio_per_exec format 999,999,999,990.00 heading "Avg PIO|Per Exec"
col cpu_per_exec format 999,999,999,990.00 heading "Avg|CPU (secs)|Per Exec"
col ela_per_exec format 999,999,999,990.00 heading "Avg|Elapsed (secs)|Per Exec"
col sql_text format a64 heading "Text of SQL statement"
clear breaks computes
ttitle off
btitle off
accept V_SQL_ID prompt "Enter the SQL_ID: "
accept V_NBR_DAYS prompt "Enter number of days (backwards from this hour) to report (default: ALL): "
variable v_nbr_days number
spool sqlhistory_&&V_SQL_ID
declare
cursor get_phv(in_sql_id in varchar2, in_days in integer)
is
select ss.plan_hash_value,
min(s.begin_interval_time) min_time,
max(s.begin_interval_time) max_time,
min(s.snap_id) min_snap,
max(s.snap_id) max_snap,
sum(ss.executions_delta) sum_execs,
sum(ss.disk_reads_delta) sum_disk_reads,
sum(ss.buffer_gets_delta) sum_buffer_gets,
sum(ss.cpu_time_delta)/1000000 sum_cpu_time,
sum(ss.elapsed_time_delta)/1000000 sum_elapsed_time
from dba_hist_sqlstat ss,
dba_hist_snapshot s
where ss.dbid = s.dbid
and ss.instance_number = s.instance_number
and ss.snap_id = s.snap_id
and ss.sql_id = in_sql_id
/* and ss.executions_delta > 0 */
and s.begin_interval_time >= sysdate-in_days
group by ss.plan_hash_value
order by sum_elapsed_time desc;
--
cursor get_xplan(in_sql_id in varchar2, in_phv in number)
is
select plan_table_output
from table(dbms_xplan.display_awr(in_sql_id, in_phv, null, 'ALL -ALIAS'));
--
v_prev_plan_hash_value number := -1;
v_text_lines number := 0;
v_errcontext varchar2(100);
v_errmsg varchar2(100);
v_display_sql_text boolean;
--
begin
--
v_errcontext := 'query NBR_DAYS from DUAL';
select decode('&&V_NBR_DAYS','',10,to_number(nvl('&&V_NBR_DAYS','10')))
into :v_nbr_days
from dual;
--
v_errcontext := 'open/fetch get_phv';
for phv in get_phv('&&V_SQL_ID', :v_nbr_days) loop
--
if get_phv%rowcount = 1 then
--
dbms_output.put_line('+'||
rpad('-',12,'-')||
rpad('-',10,'-')||
rpad('-',10,'-')||
rpad('-',12,'-')||
rpad('-',15,'-')||
rpad('-',15,'-')||
rpad('-',12,'-')||
rpad('-',12,'-')||'+');
dbms_output.put_line('|'||
rpad('Plan HV',12,' ')||
rpad('Min Snap',10,' ')||
rpad('Max Snap',10,' ')||
rpad('Execs',12,' ')||
rpad('LIO',15,' ')||
rpad('PIO',15,' ')||
rpad('CPU',12,' ')||
rpad('Elapsed',12,' ')||'|');
dbms_output.put_line('+'||
rpad('-',12,'-')||
rpad('-',10,'-')||
rpad('-',10,'-')||
rpad('-',12,'-')||
rpad('-',15,'-')||
rpad('-',15,'-')||
rpad('-',12,'-')||
rpad('-',12,'-')||'+');
--
end if;
--
dbms_output.put_line('|'||
rpad(trim(to_char(phv.plan_hash_value)),12,' ')||
rpad(trim(to_char(phv.min_snap)),10,' ')||
rpad(trim(to_char(phv.max_snap)),10,' ')||
rpad(trim(to_char(phv.sum_execs,'999,999,990')),12,' ')||
rpad(trim(to_char(phv.sum_buffer_gets,'999,999,999,990')),15,' ')||
rpad(trim(to_char(phv.sum_disk_reads,'999,999,999,990')),15,' ')||
rpad(trim(to_char(phv.sum_cpu_time,'999,990.00')),12,' ')||
rpad(trim(to_char(phv.sum_elapsed_time,'999,990.00')),12,' ')||'|');
--
v_errcontext := 'fetch/close get_phv';
--
end loop;
dbms_output.put_line('+'||
rpad('-',12,'-')||
rpad('-',10,'-')||
rpad('-',10,'-')||
rpad('-',12,'-')||
rpad('-',15,'-')||
rpad('-',15,'-')||
rpad('-',12,'-')||
rpad('-',12,'-')||'+');
--
v_errcontext := 'open/fetch get_phv';
for phv in get_phv('&&V_SQL_ID', :v_nbr_days) loop
--
if v_prev_plan_hash_value <> phv.plan_hash_value then
--
v_prev_plan_hash_value := phv.plan_hash_value;
v_display_sql_text := FALSE;
--
v_text_lines := 0;
v_errcontext := 'open/fetch get_xplan';
for s in get_xplan('&&V_SQL_ID', phv.plan_hash_value) loop
--
if v_text_lines = 0 then
dbms_output.put_line('.');
dbms_output.put_line('========== PHV = ' ||
phv.plan_hash_value ||
'==========');
dbms_output.put_line('First seen from "'||
to_char(phv.min_time,'MM/DD/YY HH24:MI:SS') ||
'" (snap #'||phv.min_snap||')');
dbms_output.put_line('Last seen from "'||
to_char(phv.max_time,'MM/DD/YY HH24:MI:SS') ||
'" (snap #'||phv.max_snap||')');
dbms_output.put_line('.');
dbms_output.put_line(
rpad('Execs',15,' ')||
rpad('LIO',15,' ')||
rpad('PIO',15,' ')||
rpad('CPU',15,' ')||
rpad('Elapsed',15,' '));
dbms_output.put_line(
rpad('=====',15,' ')||
rpad('===',15,' ')||
rpad('===',15,' ')||
rpad('===',15,' ')||
rpad('=======',15,' '));
dbms_output.put_line(
rpad(trim(to_char(phv.sum_execs,'999,999,999,990')),15,' ')||
rpad(trim(to_char(phv.sum_buffer_gets,'999,999,999,990')),15,' ')||
rpad(trim(to_char(phv.sum_disk_reads,'999,999,999,990')),15,' ')||
rpad(trim(to_char(phv.sum_cpu_time,'999,999,990.00')),15,' ')||
rpad(trim(to_char(phv.sum_elapsed_time,'999,999,990.00')),15,' '));
dbms_output.put_line('.');
end if;
--
if v_display_sql_text = FALSE and
s.plan_table_output like 'Plan hash value: %' then
--
v_display_sql_text := TRUE;
--
end if;
--
if v_display_sql_text = TRUE then
--
dbms_output.put_line(s.plan_table_output);
--
end if;
--
v_text_lines := v_text_lines + 1;
--
end loop;
--
end if;
--
v_errcontext := 'fetch/close get_phv';
--
end loop;
--
exception
when others then
v_errmsg := sqlerrm;
raise_application_error(-20000, v_errcontext || ': ' || v_errmsg);
end;
/
break on report
compute sum of execs on report
compute avg of lio_per_exec on report
compute avg of pio_per_exec on report
compute avg of cpu_per_exec on report
compute avg of ela_per_exec on report
ttitle center 'Summary Execution Statistics Over Time'
select to_char(s.begin_interval_time, 'DD-MON HH24:MI') snap_time,
ss.executions_delta execs,
ss.buffer_gets_delta/decode(ss.executions_delta,0,1,ss.executions_delta) lio_per_exec,
ss.disk_reads_delta/decode(ss.executions_delta,0,1,ss.executions_delta) pio_per_exec,
(ss.cpu_time_delta/1000000)/decode(ss.executions_delta,0,1,ss.executions_delta) cpu_per_exec,
(ss.elapsed_time_delta/1000000)/decode(ss.executions_delta,0,1,ss.executions_delta) ela_per_exec
from dba_hist_snapshot s,
dba_hist_sqlstat ss
where ss.dbid = s.dbid
and ss.instance_number = s.instance_number
and ss.snap_id = s.snap_id
and ss.sql_id = '&&V_SQL_ID'
/* and ss.executions_delta > 0 */
and s.begin_interval_time >= sysdate - :v_nbr_days
order by s.snap_id;
clear breaks computes
break on phv skip 1 on report
compute sum of execs on phv
compute avg of lio_per_exec on phv
compute avg of pio_per_exec on phv
compute avg of cpu_per_exec on phv
compute avg of ela_per_exec on phv
ttitle center 'Per-Plan Execution Statistics Over Time'
select ss.plan_hash_value phv,
to_char(s.begin_interval_time, 'DD-MON HH24:MI') snap_time,
ss.executions_delta execs,
ss.buffer_gets_delta/decode(ss.executions_delta,0,1,ss.executions_delta) lio_per_exec,
ss.disk_reads_delta/decode(ss.executions_delta,0,1,ss.executions_delta) pio_per_exec,
(ss.cpu_time_delta/1000000)/decode(ss.executions_delta,0,1,ss.executions_delta) cpu_per_exec,
(ss.elapsed_time_delta/1000000)/decode(ss.executions_delta,0,1,ss.executions_delta) ela_per_exec
from dba_hist_snapshot s,
dba_hist_sqlstat ss
where ss.dbid = s.dbid
and ss.instance_number = s.instance_number
and ss.snap_id = s.snap_id
and ss.sql_id = '&&V_SQL_ID'
/* and ss.executions_delta > 0 */
and s.begin_interval_time >= sysdate - :v_nbr_days
order by ss.plan_hash_value, s.snap_id;
clear breaks computes
spool off
set verify on echo on feedback on
ttitle off
************ Happy Learning ***************
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