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Home -> Community -> Mailing Lists -> Oracle-L -> Re:Query Tuning - Need Some Clarifiations
The frequency at which you rebuild indexes and/or analyze the database is somewhat of a black art. My first question is what do you mean by "there are huge inserts,updates and deletes"? Our operational data store for our testers goes through something line 6 million inserts/updates/deletes per day and the maintenance is being done every 6 months without any performance degradation in between.
Dick Goulet
____________________Reply Separator____________________ Author: "C.S.Venkata Subramanian" <csvenkata_at_lycos.com> Date: 8/10/2001 11:45 PM
Dear Listers,
My manager called me asked to look into the database problems in an IVR appln.
The size of the database is around 1 gigs. The db stores information about
customers, their phone nos and the relevant details. The mail problem was delay
in playing a welcome prompt when the call connects to IVR, 6 queries are
executed before playing the welcome message and there was a major delay when the
customer needed some info. Basically it has to query the database and pass on
the info the person who had called.
First I got all the queries and checked the plan,time taken for each query. I found all the queries did a full table scan and after creating necessary indexes and analyzing the tables, I hit the right thing. Now the welcome message is played moment the call is connected to IVR and there is no time lag susequent queries.
Using tkprof I checked the usage of indexes,CPU usage, time taken for parse,execution. All showing 0. The customer is happy now and also the manager.
I have few doubts. It is an OLTP kind of scenario, there are huge inserts,updates and deletes, in what frequency I have to rebuild indexes and analyze the tables after rebuilding indexes.
Since the db is in noarchivelog mode, it is advisible to put the same in archivelog mode.
Any advices/suggestions are welcome.
Regards
C.S.Venkata Subramanian
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Author: C.S.Venkata Subramanian
INET: csvenkata_at_lycos.com
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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). Received on Mon Aug 13 2001 - 11:03:18 CDT
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