Re: FW: Error related to hash memory
From: Lok P <loknath.73_at_gmail.com>
Date: Fri, 3 Dec 2021 19:23:46 +0530
Message-ID: <CAKna9VYca_+onfm3T8tYhqPzdFx781kt9ZiUOx76uvaS2zBNww_at_mail.gmail.com>
(Col_data, '*', 1,3) + 1, ( INSTR (Col_data,'*', 1, 4)- INSTR (Col_data,
'*', 1, 3))- 1)) FROM DUAL) vnm,
(SUBSTR (Col_data, 1, INSTR (Col_data,'*', 1,1) - 1),'M1', SUBSTR
(Col_data,INSTR (Col_data, '*',1,2) + 1, ( INSTR (Col_data, '*',1,3) -
INSTR (Col_data, '*', 1,2))-1))) FROM DUAL)
Date: Fri, 3 Dec 2021 19:23:46 +0530
Message-ID: <CAKna9VYca_+onfm3T8tYhqPzdFx781kt9ZiUOx76uvaS2zBNww_at_mail.gmail.com>
Thank You So Much Jonathan and Mark.
As you said exactly there are many decodes/cases in the query and
scalar subqueries just before 'group by' applies. There is a
function(Pkg1.Fun1) used which is not parallel enabled. Also parallel hints
used in the Select part of the query. And this query does insert+append
into a global temporary table. Also in the FROM clause all are global
temporary tables except TFA, TFMA and TSLV.
It's a big Insert query and I tried to not put all the individual columns but just key functions(like decode, case etc). It groups ~46 columns in that 'hash group by' but before that it fetches+transforms, ~55+ columns data. I will try to make that function parallel enabled + enable parallel DML for the query and then hopefully that "hash group by" can be operated in parallel.
Apology if these are silly questions,
In regards to having scalar subqueries operated after group by , would that
not make the results different?
I am still trying to understand how to find the exact opt_estimate hints
with a proper query block to make the optimizer estimate ~168million before
"hash group by". And by setting the "event 32699" will that make the error
disappear OR is it for debugging to find out the reason around the Ora-
32690?
INSERT /*+ APPEND */
INTO GTT_TABLE (.....) SELECT ......, SUM (crt), SUM (art), SUM (iamt), SUM
(amt),...... ~46 different columns
FROM (SELECT ....33 columns, DECODE ( Amt1, 1, (SELECT Pkg1.Fun1 (...) FROM DUAL), NULL), ..13 columns.., (SELECT DECODE (SUBSTR (Col_data,1,INSTR (Col_data, '*',1, 1)- 1),'XX', SUBSTR (Col_data,INSTR (Col_data,'*',1, 1)+ 1,( INSTR
(Col_data,'*',1,2)- INSTR (Col_data,'*', 1,1))- 1))FROM DUAL)/ 100 Amt,
(SELECT DECODE (MPCD,'YY', SUBSTR (Col_data,INSTR
(Col_data, '*',1, 2) + 1,( INSTR (Col_data,'*',1, 3)- INSTR (Col_data,
'*',1,2))- 1)) FROM DUAL) aty,, (SELECT DECODE (MPCD, 'YY', SUBSTR (Col_data, INSTR
(Col_data, '*', 1,3) + 1, ( INSTR (Col_data,'*', 1, 4)- INSTR (Col_data,
'*', 1, 3))- 1)) FROM DUAL) vnm,
(SELECT DECODE (SUBSTR (Col_data, 1, INSTR (Col_data,
'*', 1, 1) - 1), 'M1', SUBSTR (Col_data, INSTR (Col_data, '*', 1, 4)+ 1,(
INSTR (Col_data, '*',1,5)- INSTR (Col_data, '*', 1, 4)) - 1), NULL) FROM
DUAL) INM,
(SELECT DECODE (MCID,9999, MDID, 9999, MDID, DECODE
(SUBSTR (Col_data, 1, INSTR (Col_data,'*', 1,1) - 1),'M1', SUBSTR
(Col_data,INSTR (Col_data, '*',1,2) + 1, ( INSTR (Col_data, '*',1,3) -
INSTR (Col_data, '*', 1,2))-1))) FROM DUAL)
FROM (SELECT /*+ parallel(TTTD,4) leading(TTSFA TTTD)*/
DECODE (TTFE.C1, 'BBB', TTFE.CRT, NULL)
.......9 columns..
DECODE (TFMA.MACD, 'XX', TFMA.text1, 'XX',
TFMA.text2, NULL) RDFI,
... 18 columns..,
DECODE (TFMA.MACD, 'XX', TFMA.text1, NULL)
cbcd,
CASE
WHEN INSTR ( :B7, PTCD) = 0 THEN
TTSFA.ILVL
ELSE
CASE
WHEN (SELECT PSS FROM tmfs FS WHERE
FS.ptsid = TTFE.fsid) = 'N'
THEN CASE
WHEN (SELECT FEE.PSS FROM FEE
FEE WHERE FEE.ptsid = TTFE.fsid AND FEE.PTMCD = TTTD.MPCD) =
'Y'
THEN TTSFA.ILVL
ELSE
CASE
WHEN INSTR ( :B6, PTCD) > 0
THEN DECODE
(TTTD.MPCD,'XX', 'XX', 'XX', 'XXX','XX', 'XX','XX', 'XX', NULL)
WHEN INSTR ( :B5, PTCD) >
0
THEN DECODE (TTTD.MPCD,
'XX', 'XX', TTSFA.ILVL)
END
END
ELSE
CASE
WHEN (SELECT PSS FROM tmfs FS
WHERE FS.ptsid = TTFE.fsid) = 'Y'
THEN CASE
WHEN (SELECT FEE.PSS
FROM FEE FEE WHERE FEE.ptsid =TTFE.fsid AND FEE.PTMCD = TTTD.MPCD)
='N'
THEN CASE
WHEN INSTR
(:B6,PTCD) > 0
THEN DECODE
(TTTD.MPCD, 'XX', 'XX','VI', 'XX', 'XX', 'XX', 'XX', 'XX', NULL)
WHEN INSTR (
:B5,PTCD) >0
THEN DECODE
(TTTD.MPCD, 'XX', 'XX', TTSFA.ILVL)
END
ELSE
TTSFA.ILVL
END
END
END
END
ILVL,
DECODE (TTFE.C1, 'XX', TTFE.CRT, 'XX',
TTFE.CRT, 0) CRT,
DECODE (TTFE.C1, 'XX', TTFE.ARATE, 'XX',
TTFE.amrt, 0) ARATE,
CASE
WHEN TTFE.C1 = 'XX' OR TTFE.C1 = 'XX'
THEN ROUND ( TTFE.CRT+ ( NVL
(TTTD.samt, TTTD.TAMT) * TTFE.amrt), 2) * -1
ELSE 0
END
IN_AMT,
CASE
WHEN (SELECT COUNT (*) FROM TLSV WHERE
LNM = :B9 AND DESCR = :B8 AND LV = TTFE.C1) >0 AND TTFE.TAMT <> 0
THEN TTFE.AMT * ( NVL (TTTD.samt,
TTTD.TAMT)/ TTFE.TAMT)
ELSE 0
END
as_amt,
CASE
WHEN TLSV.LV IS NOT NULL
THEN (TTFE.AMT / TTFE.FCNT)
END
DAMT,
TFA.D_CHG / 100 D_CHG,
TFPA.PCD|| '*'| TRIM (TFPA.text1)|| '*'||
TFPA.TEXT3|| '*'|| TFPA.TEXT4|| '*'|| TFPA.TEXT5|| '*' Col_data,
DECODE (TTSFA.CT_AMT, 0, NULL, NULL, NULL,
1) CO_AMT,
DECODE (MACD, 'XX', TFMA.text2, NULL) S_CD,
DECODE (MACD, 'XX', TFMA.TEXT5, NULL) ,
DECODE (MACD, 'XX', TFMA.TEXT6, NULL) BC,
DECODE (MACD, 'XX', TFMA.TEXT8, NULL) MID,
DECODE (MACD, 'XX', TFMA.TEXT7, NULL) MTYP,
DECODE ( MACD, 'XX', TO_CHAR ( TO_DATE (TRIM
(TFMA.TEXT9),'yyyymmdd'), 'mm/dd/yyyy'), NULL) S_DT,
DECODE (TFMA.text1, NULL, 'N', 'Y') ,
TTTD.DT_MTHD
FROM TTSFA , TTTD , TFA , TFMA, TTFE,
(SELECT .. ~7 columns.. FROM TFA WHERE PCD
IN ('XX', 'XX')) TFPA,
(SELECT LV FROM TLSV WHERE LNM =
'XXXX' AND DESCR = 'XXXXXXXXX') TLSV
WHERE TTSFA.did = TTTD.did AND TFPA.SDT(+) =
TTTD.SDT AND TFPA.TDID(+) = TTTD.TDID
AND TLSV.LV(+) = TTFE.C1 AND TTSFA.FDT =
TTTD.SDT AND TTSFA.OSID = TTTD.SID AND TTTD.TDID = TFA.TDID(+)
AND TTTD.SDT = TFA.SDT(+) AND TFA.UBD(+) =
:B4 AND TTTD.TDID = TFMA.TDID(+) AND TTTD.SDT = TFMA.SDT(+)
AND TFMA.MACD(+) = DECODE (TTTD.MPCD, 'XX',
:B3, :B2) AND TTTD.DEP_IND = :B1
AND TTSFA.did = TTTD.did AND TTSFA.SMID =
TTTD.SMID AND TTFE.EID = TTSFA.did AND TTFE.IDT = TTSFA.SDT
AND TTFE.SID = TTSFA.SID AND TTFE.OTYP =
'TTFE' AND TTFE.OID = TTTD.SMID AND TTFE.BST = 'XX'
AND ( ( PTCD = 'XX' AND TTFE.fsid IS NOT
NULL)
OR (PTCD <> 'XX'))
AND ( ( PTCD = 'XX' AND TTFE.fsid IS NOT
NULL)
OR (PTCD <> 'XX'))
AND ( ( PTCD = 'XX' AND TTFE.fsid IS NOT
NULL)
OR (PTCD <> 'XX')) AND ( ( PTCD = 'XX'
AND TTFE.fsid IS NOT NULL)
OR (PTCD <> 'XX'))
AND ( ( PTCD = 'XX' AND TTFE.fsid IS NOT
NULL)
OR (PTCD <> 'XX'))
AND ( ( PTCD = 'XX' AND TTFE.fsid IS NOT
NULL)
OR (PTCD <> 'XX'))))
GROUP BY .... ~46 columns
On Thu, Dec 2, 2021 at 11:17 PM Mark W. Farnham <mwf_at_rsiz.com> wrote:
> all the stuff JL mentioned, plus a little bit that didn’t make it to > oracle-l before, probably because my remember to snip circuit is failing: > > > > Things I would try: > > > > 1) force parallel local for the query > > 2) if 1) alone fails, do 1) and on the instance of choice run a scan > of a non-indexed column of key tables of the query SIMPLY on the instance > of choice > > 3) if 1-2) fails, try a prelude of enumerating the disjoint partition > enumerators from “43 | PARTITION RANGE ITERATOR “ and generate > the union all query of the separate partitions individually, thus making > each hash memory set requirement smaller, doing these serially, rather than > in parallel (which might not be possible in 11 anyway) because your problem > is memory, not elapsed time. IF a single one of your partitions is nearly > everything, it still will probably go splat, but if they are relatively > flat each one being significantly smaller might avoid the error. IF > figuring out the enumerated list of partition predicates is fast, this also > has a **chance** to make everything faster, especially if the CBO finds a > better plan for a single partition at a time but also because each hash > area creation and probe might be a fraction of the current single one. IF > you have time to experiment, this **might** be a consistent winner on > both speed and footprint, but your mileage may vary. > > 4) forcing a sort group by **might** also work and would be easier for > most folks to code up. > > > > > > > > *From:* Mark W. Farnham [mailto:mwf_at_rsiz.com] > *Sent:* Thursday, December 02, 2021 10:04 AM > *To:* 'loknath.73_at_gmail.com'; 'Pap' > *Cc:* 'Oracle L' > *Subject:* RE: Error related to hash memory > > > > Things I would try: > > <snip> > >
-- http://www.freelists.org/webpage/oracle-lReceived on Fri Dec 03 2021 - 14:53:46 CET