11 | Index Definition structure that ObjectDB maintains in the file system rather than in memory. The keys of the BTree |
11 | JPA / JDO Class Enhancer with ObjectDB Enhancer as a Java Agent, every loaded class is checked and automatically enhanced in memory |
11 | Obtaining a JPA Database Connection in memory and applied to the database when the transaction is committed: em.getTransaction |
11 | Updating JPA Entity ObjectsModifying existing entity objects that are stored in the database is based on transparent persistence, which means that changes are detected and handled automatically. Transparent Update Once an entity object is retrieved from the database (no matter which way) it can simply be modified in memory |
11 | General Settings and Logging" threshold="64mb" /> To meet memory constraints ObjectDB can use temporary files when processing large |
7 | Best practise loading big data that the memory consumption is extremly high, many elements are hold by internal classes of ObjectDB. Garbage collection does not gain enough free memory. We experimented a bit but so far only workarounds helped to gain a lower memory footprint. One is to stupidly commit the transaction |
4 | Use temporary files to enable very large transactions the first level cache (by flush() and detach()). But an array of bytes, any ObjectDB memory, still allocates a lot of memory. For us it would be very helpful if we can get an evaluation version, in ... on the memory usage. Ideally, even with adjustable threshold. How do you estimate the realizability |
3 | stress test -> com.objectdb.o.InternalException: null out of heap memory when ObjectDB is used in embedded mode. Both Tomee and ObjectDB in server mode seem to be perfect in terms of memory usage, but using ODB as embedded changes the situation. With a heap of 100 MB, Tomee runs out of memory in ~20 minutes. With a heap of 512 MB, in around 240 min (4 |
1 | [ODB1] Chapter 8 - ObjectDB Server, you can increase the maximum allowed memory and instruct Java to run in server mode in order to enlarge |
1 | [ODB1] Chapter 7 - JDOQL Queries a collection is less common than querying an Extent. It is useful for filtering a collection in memory |
