How to clear the caches?

[Field888]

I write a circulation to save thousands of documents into the Repository; But after executing about 500 times,it throws exceptions as below:
\"org.apache.jackrabbit.core.persistence.db.DatabasePersistenceManager - failed to write node state: 573c07a7-60c0-4a2d-8dac-621fe0ba0bda
java.lang.OutOfMemoryError: Java heap space
at org.apache.derby.iapi.services.io.DynamicByteArrayOutputStream.<init>(Unknown Source)
at org.apache.derby.impl.store.raw.data.StoredPage.doUpdateAtSlot(Unknown Source)
……………………\"

I guess Session ItemManager Cache and CacheManager Cache would cause the problem. So,is there any method to clear the cache after every save option.
(\'Node.save\' or \'session.save\' can\'t solve de problem)

[jllort]

You\'re problem is not on cache, your problem I think is on memory usage take a look at error \"Java heap space\" Try to setting more memory to JVM, which kind of document are you uploading how greater are ?

Explain more what are you doing on importing, because we\'ve tested importation with some great repositories.