2026-03-12 20:23:15

vg/sptrends.sql

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+/**********************************************************************
+ * File:        sptrends.sql
+ * Type:        SQL*Plus script
+ * Author:      Tim Gorman (Evergreen Database Technologies, Inc.)
+ * Date:        15-Jul-2003
+ *
+ * Description:
+ *      Query to display "trends" for specific statistics captured by
+ *	the STATSPACK package, and display summarized totals daily and
+ *	hourly as a deviation from average.  The intent is to find the
+ *	readings with the greatest positive deviation from the average
+ *	value, as these are likely to be "periods of interest" for
+ *	further research...
+ *
+ * Modifications:
+ *	TGorman 02may04	corrected bug in LAG() OVER () clauses
+ *	TGorman	10aug04	changed "deviation" column from some kind of
+ *			weird "deviation from average" calculation to
+ *			a more straight-forward percentage ratio
+ *********************************************************************/
+set echo off feedback off timing off pagesize 200 linesize 130 trimout on trimspool on verify off recsep off
+col sort0 noprint
+col day heading "Day"
+col hr heading "Hour"
+col value format 999,999,999,990 heading "Value"
+
+accept V_NBR_DAYS prompt "How many days of data to examine? "
+prompt
+prompt
+prompt Some useful database statistics to search upon:
+select  chr(9)||name name
+from	v$statname
+order by 1;
+accept V_STATNAME prompt "What statistic do you want to analyze? "
+
+col spoolname new_value V_SPOOLNAME noprint
+select	replace(replace(replace(lower('&&V_STATNAME'),' ','_'),'(',''),')','') spoolname
+from	dual;
+
+spool sptrends_&&V_SPOOLNAME
+clear breaks computes
+col deviation format a100 heading "Percentage of total over all days"
+prompt
+prompt Daily trends for "&&V_STATNAME"...
+select	sort0,
+	day,
+	value,
+	rpad('*', round((value/sum(value) over ())*100, 0), '*') deviation
+from	(select	sort0,
+		day,
+		sum(value) value
+	 from	(select	to_char(ss.snap_time, 'YYYYMMDD') sort0,
+			to_char(ss.snap_time, 'DD-MON') day,
+			s.snap_id,
+			s.name,
+			nvl(decode(greatest(s.value, nvl(lag(s.value) over (partition by s.dbid, s.instance_number order by s.snap_id),0)),
+				   s.value, s.value - lag(s.value) over (partition by s.dbid, s.instance_number order by s.snap_id),
+					  s.value), 0) value
+		 from	stats$sysstat		s,
+			stats$snapshot		ss
+		 where	ss.snap_id = s.snap_id
+		 and	ss.dbid = s.dbid
+		 and	ss.instance_number = s.instance_number
+		 and	ss.snap_time between (sysdate - &&V_NBR_DAYS) and sysdate
+		 and	s.name = '&&V_STATNAME')
+	 group by sort0,
+		  day)
+order by sort0;
+
+clear breaks computes
+break on day skip 1 on report
+col deviation format a100 heading "Percentage of total over all hours for each day"
+prompt
+prompt Daily/hourly trends for "&&V_STATNAME"...
+select	sort0,
+	day,
+	hr,
+	value,
+	rpad('*', round((value/sum(value) over (partition by day))*100,0), '*') deviation
+from	(select	sort0,
+		day,
+		hr,
+		name,
+		sum(value) value
+	 from	(select	to_char(ss.snap_time, 'YYYYMMDDHH24') sort0,
+			to_char(ss.snap_time, 'DD-MON') day,
+			to_char(ss.snap_time, 'HH24')||':00' hr,
+			s.snap_id,
+			s.name,
+			nvl(decode(greatest(s.value, nvl(lag(s.value) over (partition by s.dbid, s.instance_number order by s.snap_id),0)),
+				   s.value, s.value - lag(s.value) over (partition by s.dbid, s.instance_number order by s.snap_id),
+					  s.value), 0) value
+		 from	stats$sysstat		s,
+			stats$snapshot		ss
+		 where	ss.snap_id = s.snap_id
+		 and	ss.dbid = s.dbid
+		 and	ss.instance_number = s.instance_number
+		 and	ss.snap_time between (sysdate - &&V_NBR_DAYS) and sysdate
+		 and	s.name = '&&V_STATNAME')
+	 group by sort0,
+		  day,
+		  hr,
+		  name)
+order by sort0;
+spool off
+set verify on recsep each