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25

How Should I Configure objectdb.conf to Obtain 256KB Disk IO Requests and Maximize Shared PersistenceManager Entity Cache?

to give 256KB disk accesses and use PersistenceManager L1 ref=soft caching and datastore pagefile caching 1 MB (4 256KB sized pages).  The goal is to have frequent PersistenceManager L1 cache hit, then less frequent datastore pagefile cache hit, then when absolutely necessary, read/write from
Result
25

What is new in ObjectDB 2.0?

(PersistenceManagerFactory scope) object data cache. Query program cache for repeating queries with different arguments. Query result cache for repeating queries with identical arguments. Improved configurable database page cache. Designed to support very large database files (terabytes). Reducing round
Forum
25

Distributed second level cache

Is it possible to configure the second level cache as distributed? The use-case: The object Person "John" is read on application node 1 and also on application node 2 to the second level caches ... cache on application node 1 has a correct data. The object Person is read from application node 2
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25

Caching/Paging Questions...

references to such cached result objects ? or do ObjectDB exploits frequency of querying such objects ... size of ObjectDB L2 cache or EntityManager context ? Q4: Would paging result sets ... (the EntityManager L1 cache) but instantiation of the results (if they contain entity objects
Forum
25

JPA Level 2 Cache - app config

Hello! I would like to use selective cache for JPA Level 2 (cached in EntityManagerFactory) in one app, but no cache at all in another app. Both will be connected to the same ObjectDB server & db ... #The_cache_element_ specifies only amount of MB used for Level 2 cache, but the config is at server
Forum
25

Cache configuration of database file pages, query programs, query results

Are there some possibilities to configure following caches in order to keep cache data for only some important entity types and for the entire life cycle of the EntityManagerFactory. Cache of database file pages. Cache of query programs. Cache of query execution results. These caches are fully
Forum
24

Compiled Queries and Cache

objectdb.conf has options for query results and program cache.  (objectdb.conf > database > query-cache > results and programs, http://www.objectdb.com/java/jpa/setting/database#The_query-cache ... cache still available?   Yes, these are server/store side caches. The exact client side code doesn't affect. CBE
Forum
24

Using of Second Level Cache

was load and the entity MyEntity1 is taken in the second level cache, the other entity types not ... list; } The 2nd level cache stores object data (byte[]) rather than live entity objects ... cache as object IDs (PK) encoded in the byte[] of a MyEntity1 instance. When you retrieve a MyEntity1
Forum
24

Working with a cleared cache

attempting to keep the L1 cache within the PersistenceManager cleared in an effort to reduce its memory ... the cache?   try { // Start the transaction m_persistenceManager ... ); // Flush the JDO cache m_persistenceManager.evictAll(); m
JDO Doc
23

javax.jdo.JDOEntityManager

the PersistenceManager cache with the datastore. Validates the PersistenceManager cache with the datastore ... , this method verifies the consistency of instances in the cache against the datastore. An implementation ... of the instances in the cache against the datastore. If any inconsistencies are detected