About cache

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JDO Doc
6

javax.jdo.identity.LongIdentity

. Since: JDO 2.0 int hashCode() Return the cached hash code. Return the cached hash code. Returns: the cached hash code. Since: JDO 1.0 void readExternal(ObjectInput in)throws IOException
JDO Doc
6

javax.jdo.identity.SingleFieldIdentity

name. Since: JDO 2.0 int hashCode() Return the cached hash code. Return the cached hash code. Returns: the cached hash code. Since: JDO 1.0 void readExternal(ObjectInput arg0)throws IOException
JDO Doc
6

javax.jdo.identity.CharIdentity

hashCode() Return the cached hash code. Return the cached hash code. Returns: the cached hash code
Issue
6

Server out of memory exceptions

on the server side became higher mainly due to increasing page cache size. I see that the test uses 4 different databases (2 large and 2 small). The default size of each page cache (per database) is 64MB, so the cache of the two large databases consumes at least 128MB (probably a little more). Other caches
Forum
5

significant performance decrease

to around 30% when the number of entities was just half of the current). We tried to optimize the cache ... ="write" /> cache="2048mb" max-threads="10" synchronized="false"/> cache results="1024mb" programs="500" />
JDO Doc
5

evictAll(pcs)

Method javax.jdo.PersistenceManager void evictAll(   Collection pcs ) Mark a Collection of instances as no longer needed in the cache. Parameters: pcs - the Collection of instances to evict from the cache. Since: JDO 1.0 See Also: evict(Object pc)
JDO Doc
5

evictAll(pcs)

Method javax.jdo.PersistenceManager void evictAll(   Object... pcs ) Mark an array of instances as no longer needed in the cache. Parameters: pcs - the array of instances to evict from the cache. Since: JDO 1.0 See Also: evict(Object pc)
JDO Doc
5

flush()

, this method synchronizes the cache with the datastore and reports any exceptions. If an optimistic transaction is active, this method obtains a datastore connection, synchronizes the cache
JDO Doc
5

getDataStoreCache()

Method javax.jdo.PersistenceManagerFactory DataStoreCache getDataStoreCache() Return the DataStoreCache that this factory uses for controlling a second-level cache. If this factory does not use a second-level cache, the returned instance does nothing. This method never returns null. Returns: the DataStoreCache Since: JDO 2.0
JDO Doc
5

hashCode()

Method javax.jdo.identity.SingleFieldIdentity int hashCode() Return the cached hash code. Returns: the cached hash code. Since: JDO 1.0