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ashclp.sql
ashclpct.sql
ashp.sql
ashpctcpu.sql
ashpcte.sql
ashpctecl.sql
ashpctes.sql
ashpcts.sql
ashrt.sql
ashrt_old.sql
ashsp.sql
ashspct.sql
ashsqlcl.sql
ashsqle.sql
ashsqlpctcl.sql
ashsqlpctcpu.sql
ashsqlpcte.sql
ashsqlpcts.sql
ashsqlpctt.sql
ashsqls.sql
avgexplore.sql
bc.sql
bc7.sql
bcmap.sql
bcmap7.sql
bcobjfb.sql
chr.sql
clone.sql
cr_rtsp.sql
cu.sql
cycledb6
cycledb9
dboc.sql
delete.me
dev_list.txt
dfio.sql
dfl.sql
diag.sql
ds.sql
ds7.sql
dsn.sql
eval1.sql
event_type.sql
event_type_nc.sql
fgidx.sql
fgtbl.sql
hashchk.sql
idx.sql
iosum.sql
iosum9.sql
iosum9x.sql
iosumx.sql
ip.sql
ipcbc.sql
ipx.sql
irtviews.sql
istat.sql
latch.sql
latch8.sql
latch_old.sql
latchchild.sql
latchclass.sql
latchx.sql
lc.sql
lock.sql
loghist8.sql
lruno.sql
mkodo.sql
mkodo_ouch.sql
mts.sql
mysess.sql
objfb.sql
objloc.sql
ogbigld.sql
ogcrobj.sql
ogdoit.sql
ogobjlst.sql
ogobjset.sql
oracpu.sql
oracputext.sql
oracpux.sql
oracpux1.sql
oracpux2.sql
oscpux.sql
oscpux1.sql
oscpux10.sql
oscpux2.sql
oscpux210.sql
osmclear.sql
osmi.sql
osmprep.sql
osmtitle.sql
osmtitlel.sql
osmtitlell.sql
osmtitlem.sql
osmtitles.sql
rbs.sql
rdohist.sql
readme.txt
rlog.sql
rtc.sql
rtcx.sql
rtio.sql
rtow.sql
rtpctx.sql
rtsess.sql
rtsess9.sql
rtsessx.sql
rtsum.sql
rtsys.sql
rtsysx.sql
rtsysx8.sql
sessinfo.sql
sessinfo9.sql
sesstat.sql
sga.sql
simsql1.sql
simsql2.sql
snap_stats.sql
spspinfo.sql
sqls1.sql
sqls18.sql
sqls19.sql
sqls2.sql
sqls3.sql
sqls4.sql
stu.sql
supers.sql
swenq.sql
swenqc.sql
swenqnew.sql
swenqx.sql
swhist.sql
swhist.sql.sav
swhistx.sql
swhistx.sql.sav
swpct.sql
swpctidle.sql
swpctx.sql
swpctxidle.sql
swsessid.sql
swsid.sql
swsw.sql
swswc.sql
swswp.sql
swsys.sql
sysstat.sql
tbfsum.sql
tcsizing.sql
tcstats.sql
test.sql
timechk.sql
topcpu
topdml.sql
tp.sql
tp9.sql
tsmap.sql
tss.sql
undo.sql
users.sql
------------------------------------------------------------
-- file avgexplore.sql "event name" sample_time(sec)
-- desc Explore wait time average (‹"event name"› ‹sample seconds›)
-- author Craig A. Shallahamer, craig@orapub.com
-- orig 09-Nov-2010
-- lst upt 09-Nov-2010
-- copyright (c)2010 OraPub, Inc.
-- example @avgexplore "db file async I/O submit" 60
------------------------------------------------------------
prompt
prompt
prompt Exploring averages for wait event, &1, with a sample duration of &2 seconds
set termout off
def ev_name='&1'
def sleep_time=&2
set tab off
alter session set commit_write="batch,nowait";
drop table op_histogram_snap;
create table op_histogram_snap as select * from v$event_histogram where 1=0;
col val1 new_val totw noprint
col val2 new_val timw noprint
select total_waits val1,time_waited val2
from v$system_event
where event = '&ev_name'
/
truncate table op_histogram_snap
/
insert into op_histogram_snap
select * from v$event_histogram
where event='&ev_name'
/
-- If the commit below does not occur, somehow 22 rows get inserted.
commit;
exec dbms_lock.sleep(&sleep_time)
/
set termout on
set verify off echo off feedback off
set heading on
select cur.wait_time_milli max_bucket_time_ms,
cur.wait_count-prev.wait_count occurs
from v$event_histogram cur,
op_histogram_snap prev
where cur.event# = prev.event#
and cur.event = prev.event
and cur.wait_time_milli = prev.wait_time_milli
and cur.event = '&ev_name'
/
set heading off
select 'standard average wait time = '||round(10*((time_waited-&timw)/(total_waits-&totw+0.0000000010)),3)||' ms, ( total ms waited = '||
round(10*(time_waited-&timw),3) ||', total waits = ' || round((total_waits-&totw+0.0000000010),0) || ' )'
from v$system_event
where event = '&ev_name'
/
set serveroutput on buffer 2560000
SET SERVEROUTPUT ON SIZE 1000000
begin
declare
cursor main_cur is
select cur.wait_time_milli dur_ms,
cur.wait_count-prev.wait_count occurs
from v$event_histogram cur,
op_histogram_snap prev
where cur.event# = prev.event#
and cur.event = prev.event
and cur.wait_time_milli = prev.wait_time_milli
and cur.event = '&ev_name';
main_rec main_cur%ROWTYPE;
tot_occurs number;
sum_product number;
wa number;
prev_bucket number;
between_bucket number;
begin
tot_occurs := 0;
sum_product:= 0;
for main_rec in main_cur
loop
tot_occurs := tot_occurs + main_rec.occurs;
prev_bucket := floor(main_rec.dur_ms / 2);
between_bucket := prev_bucket + ((main_rec.dur_ms - prev_bucket)/2) ;
sum_product := sum_product + (main_rec.occurs * between_bucket);
end loop;
wa := round(sum_product / (tot_occurs+0.000000000010),3) ;
dbms_output.put_line('weighted average wait time = '||wa||' ms, ( sum product = '||round(sum_product,3)|| ', total waits = '||round(tot_occurs,0) || ' )');
end;
end;
/
set heading on
set termout on
start osmclear
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