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Home -> Community -> Mailing Lists -> Oracle-L -> RE: More info on sql query running slow
Hi
Only 928 records satisfy flag set ot 'Y'. Unfortuneately they have standard edition which does not support bitmap indexes. I did create an index on hold_payment_flag in my test database and the cost went from 3347 to 413. Time went from 38 seconds to 1 second. I will have to see what production does and weigh cost of adding a extra index.
Thanks
Rick
<adary_at_mehish To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
.co.il> cc:
Sent by: Subject: RE: More info on sql query running slow
root_at_fatcity.
com
03/20/2002
09:38 AM
Please
respond to
ORACLE-L
Hello Rick
How many records satisfy the selection without referring to the
hold_payment_flag?
How many of those have the flag set to 'y'?
Are your indexes bitmaps or regular?
Of the top of my head I will build bitmap indexes for all the fields, including hold_payment_flag.
Yechiel Adar, Mehish Computer Services
adary_at_mehish.co.il
> -----Original Message-----
> From: Rick_Cale_at_teamhealth.com [SMTP:Rick_Cale_at_teamhealth.com]
> Sent: Wed, March 20, 2002 3:58 PM
> To: Multiple recipients of list ORACLE-L
> Subject: More info on sql query running slow
>
> Hi All,
> Oracle 8.1.6
>
> I have 2 tables which have been analyzed. The query takes about 30+
> seconds
> to run. If I run it many times it is faster as data gets loaded into
> buffer
> cache. I want to optimize when that is not the case. All the fields in
> the
> query have a separate index created EXCEPT for
> ACCRUED_AND_PAID.hold_payment_flag.
>
> Phy_Contracts has 10,466 rows.
> Accrued_and_Paid has 820,919 rows.
>
> Here is output from explain plan
>
> SELECT STATEMENT Cost = 1382
> SORT AGGREGATE
> NESTED LOOPS
> TABLE ACCESS BY INDEX ROWID PHY_CONTRACTS
> INDEX RANGE SCAN PCON_CMPY_FK
> TABLE ACCESS BY INDEX ROWID ACCRUED_AND_PAID
> INDEX RANGE SCAN ADPD_PCON_FK
>
> Any ideas what I can do to speed this query.
>
> SELECT COUNT(a.phy_contract_id)
> FROM accrued_and_paid a, phy_contracts b
> WHERE a.hold_payment_flag = 'Y'
> AND b.phy_contract_id = a.phy_contract_id
> AND b.company_id = 16
> AND b.contract_type = 'IC';
>
> List of single column index on PHY_CONTRACTS
> INDEX_NAME COLUMN_NAME
> ------------------------------ ---------------------
> PCON_CONTRACT_TYPE_IDX CONTRACT_TYPE
> PCON_CMPY_FK COMPANY_ID
> PCON_PK PHY_CONTRACT_ID
>
> List of single column index on ACCRUED_AND_PAID
> INDEX_NAME COLUMN_NAME
> ------------------------------ ------------------
> ADPD_PCON_FK PHY_CONTRACT_ID
>
>
> Thanks
> Rick
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author:
> INET: Rick_Cale_at_teamhealth.com
>
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: =?iso-8859-8?Q?=E0=E3=F8_=E9=E7=E9=E0=EC?= INET: adary_at_mehish.co.il Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). y 筅 ~'"jS +r5pzq9wtQ@_ӝRjpz b~牯>'z֜q,Ƣ).+-:Õ*.ǥ}bf)+-ǧuƢg ˊF}\r^pN^X.+-v)鞲Ơxcr[yb(֢)CRPReceived on Wed Mar 20 2002 - 09:43:27 CST
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