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Unique Index De-duplication Performance issue

408327Nov 22 2010 — edited Nov 29 2010
Hello,

We are trying to insert 200 millions rows in a table with a unique index on it. The inserts are made by a software wich is using this index to detect duplicates rows.

The rating is good up to 140 millions rows (7000 insert /sec). After the performance drop to 3 000 inserts / sec. which is not acceptable for our treatment.

The table design is: partitions by day, 32 Hash subpartitions on the dedup key + Local index on the dedup key

We have also tried IOT but the same behaviour was encoutered.

Database is 11.2.0.1 version on solaris 10 x86 with 14 GB of SGA; a test have been made with a 25 Gb of SGA but no better performance.

Thanks for your help ?

Rgds
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Locked on Dec 27 2010
Added on Nov 22 2010
#11g, #general-database-discussions, #index, #performance
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