About Cache

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1

InternalException

); Maybe it was a cache problem and restarting the database cleared the cache. Have you changed
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1

Memory leak with OutOfMemoryError exception

the following default ObjectDB settings: Temporary data RAM threshold. Page cache size Query results cache size Upping the max heap size to 256M has solved this problem. Thank you! banglo
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1

Monitoring and Performance counters

/s - total inserts, update, deletes, reads - I/O operations/s - caches current usage - uptime from last start - caches hit rate - total sessions from clients - memory usage (for heap space tuning
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1

NullPointer on query

looked again at the page cache fix (issues #116, #119, #121) and apparently the fix is incomplete. In version 2.3.6 newer pages can still be purged from the cache leaving older pages (from previous
Forum
1

ObjectDB's Database Doctor Incorrect Error Report

" the ObjectDB page size of presumably 256 KB.  (So I was wasting a lot of RAM and resources like caching based on 256 KB when I only needed 64 KB based size support caches, etc.)   Thanks
Forum
1

One transaction or two?

) so if you implement such a pool you may gain some performance in some cases (e.g. if the L1 cache is important in ... . Since you are asking about add/remove operations rather than read operation (in which the L1 cache is important
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Optimistic locking: prevent version increment on entity collection attribute

the transaction. - I then clear the EntityManager so I don't have the cached Document and then find ... clear the EntityManager it all works fine because I have the cached value of the Document returned
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1

Performance Questions...

of the EntityManager's persistence context (L1) cache. But otherwise read only databases are not faster. Future versions of ObjectDB might share an L1 cache of read only entity managers automatically
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1

Performance with large databases

, the entire database can reside in memory (using the OS cache, regardless of the JVM heap size and the ObjectDB cache size). Except this, ObjectDB performance should not be affected significantly by
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1

Removing of an entity removes also another entity type

. For example, the  EntityManager may not be aware that a cached entity object in its persistence context ... that a cached entity object in its persistence context has been removed from the database by a DELETE query