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vg/sp_evtrends.sql
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vg/sp_evtrends.sql
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/**********************************************************************
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* File: sp_evtrends.sql
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* Type: SQL*Plus script
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* Author: Tim Gorman (Evergreen Database Technologies, Inc.)
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* Date: 15-Jul-2003
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*
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* Description:
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* Query to display "trends" for specific statistics captured by
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* the STATSPACK package, and display summarized totals daily and
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* hourly as a ratio using the RATIO_FOR_REPORT analytic function.
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*
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* The intent is to find the readings with the greatest deviation
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* from the average value, as these are likely to be "periods of
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* interest" for further, more detailed research...
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*
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* This version of the script is intended for Oracle9i, which
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* records TIME_WAITED_MICRO in micro-seconds (1/100,000ths of
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* a second).
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*
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* Modifications:
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* TGorman 02may04 corrected bug in LAG() OVER () clauses
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* TGorman 10aug04 changed "deviation" column from some kind of
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* weird "deviation from average" calculation to
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* a more straight-forward percentage ratio
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* TGorman 25aug04 use "ratio_to_report()" function instead
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*********************************************************************/
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set echo off feedback off timing off pagesize 200 linesize 130
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set trimout on trimspool on verify off recsep off
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col sort0 noprint
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col day format a6 heading "Day"
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col hr format a6 heading "Hour"
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col time_waited format 999,999,999,990.00 heading "Secs Waited"
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accept V_INSTANCE prompt "Please enter the ORACLE_SID value: "
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accept V_NBR_DAYS prompt "How many days of data to examine? "
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prompt
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prompt
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prompt Some useful database statistics to search upon:
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col name format a60 heading "Name"
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select chr(9)||name name
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from v$event_name
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order by 1;
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accept V_STATNAME prompt "What statistic do you want to analyze? "
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col spoolname new_value V_SPOOLNAME noprint
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select replace(replace(replace(lower('&&V_STATNAME'),' ','_'),'(',''),')','') spoolname
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from dual;
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spool sp_evtrends_&&V_SPOOLNAME
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clear breaks computes
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break on day skip 1 on report
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col ratio format a60 heading "Percentage of total over all days"
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col name format a30 heading "Statistic Name"
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prompt
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prompt Daily trends for "&&V_STATNAME"...
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select sort0,
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day,
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name,
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time_waited,
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rpad('*', round((ratio_to_report(time_waited) over (partition by name))*60, 0), '*') ratio
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from (select sort0,
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day,
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name,
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sum(time_waited)/100000 time_waited
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from (select to_char(ss.snap_time, 'YYYYMMDD') sort0,
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to_char(ss.snap_time, 'DD-MON') day,
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s.snap_id,
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s.event name,
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nvl(decode(greatest(s.time_waited_micro, nvl(lag(s.time_waited_micro) over (partition by s.dbid, s.instance_number, s.event order by s.snap_id),0)),
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s.time_waited_micro, s.time_waited_micro - lag(s.time_waited_micro) over (partition by s.dbid, s.instance_number, s.event order by s.snap_id),
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s.time_waited_micro), 0) time_waited
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from stats$system_event s,
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stats$snapshot ss,
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(select distinct
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dbid,
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instance_number
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from stats$database_instance
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where instance_name = '&&V_INSTANCE') i
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where ss.dbid = i.dbid
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and ss.instance_number = i.instance_number
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and ss.snap_time between (sysdate - &&V_NBR_DAYS) and sysdate
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and s.snap_id = ss.snap_id
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and s.dbid = ss.dbid
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and s.instance_number = ss.instance_number
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and s.event like '%'||'&&V_STATNAME'||'%')
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group by sort0,
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day,
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name)
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order by sort0, name;
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clear breaks computes
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break on day skip 1 on hr on report
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col ratio format a60 heading "Percentage of total over all hours for each day"
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prompt
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prompt Daily/hourly trends for "&&V_STATNAME"...
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select sort0,
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day,
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hr,
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name,
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time_waited,
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rpad('*', round((ratio_to_report(time_waited) over (partition by day, name))*60, 0), '*') ratio
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from (select sort0,
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day,
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hr,
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name,
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sum(time_waited)/100000 time_waited
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from (select to_char(ss.snap_time, 'YYYYMMDDHH24') sort0,
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to_char(ss.snap_time, 'DD-MON') day,
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to_char(ss.snap_time, 'HH24')||':00' hr,
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s.snap_id,
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s.event name,
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nvl(decode(greatest(s.time_waited_micro, nvl(lag(s.time_waited_micro) over (partition by s.dbid, s.instance_number, s.event order by s.snap_id),0)),
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s.time_waited_micro, s.time_waited_micro - lag(s.time_waited_micro) over (partition by s.dbid, s.instance_number, s.event order by s.snap_id),
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s.time_waited_micro), 0) time_waited
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from stats$system_event s,
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stats$snapshot ss,
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(select distinct
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dbid,
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instance_number
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from stats$database_instance
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where instance_name = '&&V_INSTANCE') i
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where ss.dbid = i.dbid
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and ss.instance_number = i.instance_number
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and ss.snap_time between (sysdate - &&V_NBR_DAYS) and sysdate
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and s.snap_id = ss.snap_id
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and s.dbid = ss.dbid
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and s.instance_number = ss.instance_number
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and s.event like '%'||'&&V_STATNAME'||'%')
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group by sort0,
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day,
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hr,
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name)
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order by sort0, name;
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spool off
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set verify on recsep each
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