Table availability

I have table T_TRX with 10 million records. This table has three FK and its primary key is also referenced in four other tables. I have an ETL process that inserts between 10k - 1 million records and updates around 5k records. T_TRX is a table which needs to be available 24/7 with 20k selects being executed a day as well as 5k DML transactions a day by the end users. T_TRX is partitioned by STG_ID for improved performance of selects. Unfortunately, STG_ID data is unrelated for ETL so cannot be used to exchange partition for data loads.
The ETL process takes less than 25 minutes and one merge statement does the work. T_TRX is a really important table and needs to be up 24/7. My concern is that if the ETL process has any type of failure or the session is killed and the table turns not accessible, I need a back up for this. I was thinking that I could create a back up of T_TRX before the ETL process starts, and if the ETL process fails for whatever reason, I could have a synonym point to the back up table so the end users can still access and load data.
The problem with this approach is that other than the ETL process, the end users can also load data into this table. So the backup might be outdated and the data loaded by end users lost if they did any kind of DML to the table after the back up was taken. I may be trying to reinvent the wheel, but if the ETL process fails and/ or the session loading the ETL data gets killed, how badly could this affect T_TRX for selects and DML executed by end users?

Rinne wrote:
one merge statement does the work.
Why not?
I suggest tuning it a bit .. doesn't sound that big,
You say the table is partitioned .. how about more information:
a) how is it partitioned?
b) how many indexes are on the table?
c) are any of the indexes partitioned? How?
d) you mentioned 3 outgoing FK. How large are those tables ?
e) you mentioned 4 incoming FKs. Are those columns indexes? (not necessary, just checking)
In my experience, inserting 1 million rows shouldn't take more than about 5 min.
If it's taking longer, you need to tune things ... your database, the table, the query .. in that order. (ie no point tuning the query if the database isn't setup properly )

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Hi All
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But in the below example, the QUERY_TABLE IS BSAUTHORS.
In my case, the QUERY_TABLE is VBKD(Sales Document Table).
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ERROR END----
Can anyone please give me a solution for this?
Thanks in Advace,
Vijay.
**********************Code**********************
import com.sap.mw.jco.*;
public class JcoTest {
private static JCO.Client theConnection;
private static IRepository theRepository;
public static void main(String[] args) {
createConnection();
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Maracles, is this still an issue?
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Answer an interesting question?
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