Improving fetch times
- From: Yechiel Adar <adar666@xxxxxxxxxxxx>
- To: ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Fri, 20 Jul 2007 13:41:08 +0300
I have a problem with a query that takes a long time to fetch.
Each execution fetch about 6-7,000 rows.
How can I improve the fetch phase?
I will also open a TAR but I decided to ask also for your help.
Oracle 10.2.0.2 on windows.
SELECT R.DDATE, R.IINDEX, R.NRATE
FROM RATES R, RATESDATE R1
WHERE
(R1.DDATE = '7/31/2007')
AND (R.IINDEX= R1.IINDEX)
AND (R1.DLASTUPDATE = R.DDATE)
ORDER BY R.DDATE,R.IINDEX
call count cpu elapsed disk query
current rows
------- ------ -------- ---------- ---------- ---------- ----------
----------
Parse 2963 0.06 0.09 0 0
0 0
Execute 2963 3.89 380.16 0 174817
0 0
Fetch 23704 61.96 6987.59 0 0 0
17996747
------- ------ -------- ---------- ---------- ---------- ----------
----------
total 29630 65.92 7367.85 0 174817 0
17996747
Misses in library cache during parse: 1
Optimizer mode: CHOOSE
Parsing user id: 39
Rows Row Source Operation
------- ---------------------------------------------------
6069 PX COORDINATOR (cr=59 pr=0 pw=0 time=2698736 us)
0 PX SEND QC (ORDER) :TQ10001 (cr=0 pr=0 pw=0 time=0 us)
0 SORT ORDER BY (cr=0 pr=0 pw=0 time=0 us)
0 PX RECEIVE (cr=0 pr=0 pw=0 time=0 us)
0 PX SEND RANGE :TQ10000 (cr=0 pr=0 pw=0 time=0 us)
0 NESTED LOOPS (cr=0 pr=0 pw=0 time=0 us)
0 PX BLOCK ITERATOR PARTITION: 1 24 (cr=0 pr=0 pw=0 time=0 us)
0 INDEX FAST FULL SCAN I_P_DDATE_IINDEX_NRATE PARTITION: 1
24 (cr=0 pr=0 pw=0 time=0 us)(object id 73075)
0 INDEX RANGE SCAN I_DDATE_IINDEX_DLASTUPDATE (cr=0 pr=0
pw=0 time=0 us)(object id 73101)
TIA
--
Adar Yechiel
Rechovot, Israel
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