116 lines
4.7 KiB
SQL
116 lines
4.7 KiB
SQL
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/*
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ASH graph from v$active_session_history no filter by DBID nor time
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don't use dba_hist_active_sess_history ,
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Output looks like
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TO_CHAR( AAS PCT1 FIRST PCT2 SECOND GRAPH
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-------- --- ---- --------------- ---- --------------- -------------------------------------------
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15 15:00 7 46 db file sequent 19 CPU +++++++ooooooooooooo4ooooooooooo------
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15 16:00 6 53 db file sequent 31 CPU +++++++++ooooooooooo4oooooooo---
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15 17:00 7 48 db file sequent 41 CPU +++++++++++++++ooooo4oooooooooooooooo-
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15 18:00 5 55 CPU 37 db file sequent ++++++++++++++oooooo4oooooo-
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15 19:00 1 64 CPU 21 db file sequent ++o 4
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15 20:00 1 63 CPU 19 read by other s ++++o- 4
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15 21:00 2 31 db file sequent 24 CPU ++ooo---- 4
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15 22:00 3 35 CPU 24 db file scatter +++++ooooooo--- 4
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15 23:00 6 29 log file sync 25 db file sequent ++++ooooooooo-------4-------------
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16 00:00 7 52 db file sequent 27 CPU ++++++++++oooooooooo4ooooooooooooooo--
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16 01:00 4 57 CPU 36 db file sequent +++++++++++oooooooo 4
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16 02:00 6 38 db file sequent 21 CPU ++++++oooooooooooo--4---------
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16 03:00 3 69 db file sequent 20 CPU +++ooooooooooo 4
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16 04:00 0 45 db file sequent 28 CPU o 4
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16 05:00 1 58 db file sequent 24 CPU +ooo 4
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16 06:00 1 41 db file sequent 39 CPU +oo 4
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The "graph" on the right shows the load over time each line is an hour by default.
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The "+" represent CPU, "o" represent I/O and "-" represent a wait.
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The columns "FIRST" and "SECOND" represent the top two things happening on the database.
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*/
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Def v_secs=3600 -- bucket size
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Def v_days=1 -- total time analyze
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Def v_bars=5 -- size of one AAS in characters
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Def v_graph=80
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col aveact format 999.99
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col graph format a30
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col fpct format 9.99
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col spct format 9.99
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col tpct format 9.99
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col aas1 format 9.99
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col aas2 format 9.99
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select to_char(start_time,'DD HH24:MI:SS'),
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samples,
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--total,
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--waits,
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--cpu,
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round(fpct * (total/&v_secs),2) aas1,
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decode(fpct,null,null,first) first,
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round(spct * (total/&v_secs),2) aas2,
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decode(spct,null,null,second) second,
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substr(substr(rpad('+',round((cpu*&v_bars)/&v_secs),'+') ||
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rpad('-',round((waits*&v_bars)/&v_secs),'-') ||
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rpad(' ',p.value * &v_bars,' '),0,(p.value * &v_bars)) ||
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p.value ||
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substr(rpad('+',round((cpu*&v_bars)/&v_secs),'+') ||
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rpad('-',round((waits*&v_bars)/&v_secs),'-') ||
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rpad(' ',p.value * &v_bars,' '),(p.value * &v_bars),10) ,0,30)
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graph
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-- spct,
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-- decode(spct,null,null,second) second,
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-- tpct,
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-- decode(tpct,null,null,third) third
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from (
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select start_time
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, max(samples) samples
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, sum(top.total) total
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, round(max(decode(top.seq,1,pct,null)),2) fpct
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, substr(max(decode(top.seq,1,decode(top.event,'ON CPU','CPU',event),null)),0,15) first
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, round(max(decode(top.seq,2,pct,null)),2) spct
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, substr(max(decode(top.seq,2,decode(top.event,'ON CPU','CPU',event),null)),0,15) second
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, round(max(decode(top.seq,3,pct,null)),2) tpct
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, substr(max(decode(top.seq,3,decode(top.event,'ON CPU','CPU',event),null)),0,10) third
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, sum(waits) waits
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, sum(cpu) cpu
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from (
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select
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to_date(tday||' '||tmod*&v_secs,'YYMMDD SSSSS') start_time
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, event
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, total
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, row_number() over ( partition by id order by total desc ) seq
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, ratio_to_report( sum(total)) over ( partition by id ) pct
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, max(samples) samples
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, sum(decode(event,'ON CPU',total,0)) cpu
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, sum(decode(event,'ON CPU',0,total)) waits
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from (
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select
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to_char(sample_time,'YYMMDD') tday
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, trunc(to_char(sample_time,'SSSSS')/&v_secs) tmod
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, to_char(sample_time,'YYMMDD')||trunc(to_char(sample_time,'SSSSS')/&v_secs) id
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, decode(ash.session_state,'ON CPU','ON CPU',ash.event) event
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, sum(decode(session_state,'ON CPU',1,decode(session_type,'BACKGROUND',0,1))) total
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, (max(sample_id)-min(sample_id)+1) samples
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from
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v$active_session_history ash
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group by trunc(to_char(sample_time,'SSSSS')/&v_secs)
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, to_char(sample_time,'YYMMDD')
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, decode(ash.session_state,'ON CPU','ON CPU',ash.event)
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) chunks
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group by id, tday, tmod, event, total
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) top
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group by start_time
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) aveact,
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v$parameter p
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where p.name='cpu_count'
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order by start_time
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/
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