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Schema analysis took much longer on new server

We have recently migrated an Oracle 9i (9.2.0.7) database from Sunfire 4800 to Oracle 10g (10.2.0.1) on a new Sunfire e2900 server (two-node RAC), each with eight CPUs and 16GB RAM, which is double the previous configuration. We have analyzed the schema using execute dbms_utility.analyze_schema('ETMS','COMPUTE'); It took 13 hours to complete. But my 9i database just took 4.5 hours. Kindly suggest what went wrong.

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In Oracle 10g, use the DBMS_STATS utility instead of the DBMS_UTILITY supplied package. This will help your cause greatly. And then look into letting Oracle automatically determine the sample size to compute statistics with (DBMS_STATS.AUTO_SAMPLE_SIZE). This document describes the DBMS_STATS package in more detail.

This was first published in January 2007

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