RE: Performance problem: Loading data via insert
- From: "Chitale, Hemant K" <Hemant-K.Chitale@xxxxxx>
- To: <abhishek.gurung@xxxxxxxxxxx>
- Date: Fri, 14 Mar 2014 16:27:29 +0800
So, apparently, you are not doing BULK INSERTs but Row-By-Row Inserts. All
suggestions about using PARALLEL and NOLOGGING are, then, irrelevant.
Does this database receive a significantly different (more columns) XML file
? Could the delay be in the parsing of the XML file ? Is it parsed on the
database server or parsed and inserted from an application server ? If using
an application server, have you looked at load on the application server and
network roundtrip time ?
Hemant K Chitale
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Abhishek Gurung
Sent: Friday, March 14, 2014 3:16 PM
To: Oracle Freelist
Subject: RE: Performance problem: Loading data via insert
Hi Veerabasaiah,
Thanks for replying.
What we do is data comes in XML files we parse them convert them into insert
statement and load those data into
tables. Each of these file contains data for multiple tables. before inserting
data we also Create and alter tables in database,
if we find any new tables or columns in XML file. Then we execute this sql file
containing insert statements to load
data into different tables.
The loading process for all the databases instances start almost at same
time(as soon as they receive the xml file).
We have even try to load the files while no other database loading was going on
but still the loading is taking
same time. So we conclude that there is something wrong with this database
instance but unable to identify it.
Regards
Abhishek
________________________________
Date: Fri, 14 Mar 2014 10:01:25 +1300
Subject: Re: Performance problem: Loading data via insert
From: veeracb@xxxxxxxxx
To: sameer.choudhari@xxxxxxxxx
CC: carlos.sierra.usa@xxxxxxxxx; abhishek.gurung@xxxxxxxxxxx;
oracle-l@xxxxxxxxxxxxx
Do you always load the data or cleanup some old data before inserting ?
What else is running at the same time the load is running, is something
blocking this load ?
As Carlos suggested, it would be better if you get more data around the problem
and try identify where your time is going.
On Fri, Mar 14, 2014 at 9:42 AM, Sameer Choudhari <sameer.choudhari@xxxxxxxxx>
wrote:
Try tuning your insert statements with hints like PARALLEL NOLOGGING .
On Friday, 14 March 2014, Carlos Sierra <carlos.sierra.usa@xxxxxxxxx> wrote:
Abhishek,
As always, start with the evidence:
What facts have you collected? What is AWR telling you? What are the SQL Traces
telling? Which other diagnostics tools have you used for your case?
Cheers,
Carlos Sierra
blog: carlos-sierra.net
twitter: @csierra_usa
Life's Good!
On Mar 13, 2014, at 6:52 AM, Abhishek Gurung <abhishek.gurung@xxxxxxxxxxx>
wrote:
Hi
We are facing a performance problem but unable to identify where is the
problem.
We have a production database server where about 8 database instances
of oracle is running.
Daily we insert in each of these database instances about 1-5 GB of
data in different tables.
All database instances are working fine where we are able to load
around 2-3 GB of data within 1hour except
1 where it is taking about 8 hrs to load only 4 GB of data.
When I try to load the same 4GB of data in another database where only
one instance is running and with
very less configuration as compared to the Production server we were
able to load it in 1hr 45 minutes.
Can anyone suggest how can we proceed to identify the problem?
Regards
Abhishek
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