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I want to benchmark some queries on an oracle System from a JDBC application.

However, the database seems to cache at some point in time. However, this is not intended in this case.

Is there anything like the MySQL query hint SQL_NO_CACHE.

There are Oracle query hintes /*+ FULL(test) */ and there is even the CACHE hint, but they concern whether the query results goes to the cache at all ...

What can I do on an Oracle System to get rid of any caching?

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Using an account that has the ALTER SYSTEM privilege:

alter system flush shared_pool;

followed by:

alter system flush buffer_cache;
  • Thanks, this makes the results allready better. Though I am not sure yet if nothing else is cached ... – Felix Mar 8 '12 at 8:49

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