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Message Posted: Mon, 12 May 2008 @ 09:13:29 GMT
I am joining 4 tables. First three table are joining on the basis of Key columns but the result of these 3 tables are stored in spool after that redistribution is going on to join with 4th table(4th table is having PI) because of this I/O count is very high.
I created a global temporary table & put the result of these 3 tables into global temp table to avoid the redistribution.
Earlier I was not storing the records into global temporary table. At that time, my query was taking very less spool but once I created, the global temporary table query was taking more spool however our I/O count was reduced.
Where Global Temp Tables are stored?
If someone shares his experience on I/O count and spool space OR Do we have any doc for this.
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