sub heap & ORA-4031
- From: "eagle fan" <eagle.f@xxxxxxxxx>
- To: oracle-l@xxxxxxxxxxxxx
- Date: Thu, 6 Jul 2006 17:23:10 +0800
hi:
I run a script on x$kghlu to collect the shared pool info:
column kghlurcr heading "RECURRENT|CHUNKS"
column kghlutrn heading "TRANSIENT|CHUNKS"
column kghlufsh heading "FLUSHED|CHUNKS"
column kghluops heading "PINS AND|RELEASES"
column kghlunfu heading "ORA-4031|ERRORS"
column kghlunfs heading "LAST ERROR|SIZE"
select
kghlurcr,
kghlutrn,
kghlufsh,
kghluops,
kghlunfu,
kghlunfs
from
sys.x$kghlu
where
inst_id = userenv('Instance')
/
SQL> /
RECURRENT TRANSIENT FLUSHED PINS AND ORA-4031 LAST ERROR
CHUNKS CHUNKS CHUNKS RELEASES ERRORS SIZE
---------- ---------- ---------- ---------- ---------- ----------
613 740 1481527 6.0489E+10 920 25784
2625 7264 4326 73028011 0 0
3973 4387 283981 105939833 0 0
3795 5289 91121 9508929013 0 0
2502 4805 136468 93688365 0 0
8673 10944 392 96186804 0 0
6 rows selected.
I have many questions about the results.
1. Here I have six sub pools. Why just the first one consistently get the
4031 errors?
Does each sub pool have different shared pool components?
I didn't find details info about the sub pools, if you have one, please
send me a copy.
2. I did the heapdump at level 2. The dump files is about 60M, so I can't
upload it.
How can I use the dump file to explain the 4031 errors?
I think each line "HEAP DUMP heap name="sga heap(1,0)" is related to one
sub pool , but which part is related to the first row in x$kghlu? Is it the
"sga heap(1,0)"?
3. The "LAST ERROR SIZE" column shows the size is 25784 , Does this mean
it's located in reserved list (>5000)?
Thanks
--
Eagle Fan
Oracle DBA
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