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

caching 1 MB (4 256KB sized pages). The goal is to have frequent PersistenceManager L1 cache hit ... /to the disk, but in a 256 KB sized IO packets. Is the objectdb.conf file (attached to forum thread mentioned ... Does ObjectDB access the datafile in page-sized IO requests? CBE CBE Yes. support Support

Failed to resize file - file system limitation error

file size and which file system do you use? If the database file size reached the maximum size ... \AdherisHealthSolutions\DatabaseServer\bin> CAPdev CAP Dev To answer your question, the file size of patient_history_RiteAid.odb is 157.5 GB. The file system is NTFS. This maximum file size for NTFS does

InternalError on multiple AND and JOIN Query

.logback.core.joran.action.AppenderAction - Naming appender as [SIZE_BASED_ROLLING_APPENDER] 09:30:08,912 ... will be used 09:30:08,924 |-INFO in ch.qos.logback.core.rolling.RollingFileAppender[SIZE_BASED_ROLLING_APPENDER] - Active log file name: size_example.log 09:30:08,924 |-INFO in ch.qos.logback.core.rolling

significant performance decrease

to around 400000 entities of one class (database file size around 1.5 GByte). The response time of standard queries increased with this database size to an unacceptable rate (several seconds compared ... path="$temp" threshold="64mb" /> <network inactivity-timeout="0" /> <url-history size="50

Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

consumption? If possible reduce the size of the transactions. Use enhanced classes. Reduce cache size. You can disable the L2 data cache by setting its size to 0. Use smaller database pages, so updates ... . Have you checked that all that memory is really in use? Take a heap snapshot and check the total size

Glassfish and ObjectDB 2.4.3

while visiting com/objectdb/o/BTI.class of size 166 java.lang.NullPointerException at org.glassfish.hk2 ... :722) SEVERE: Exception while visiting com/objectdb/o/MST.class of size 22459 java.lang ... -core-pool-size 16 thread-max-pool-size 32 thread-keep-alive-seconds 60 thread-queue-capacity 2147483647

NegativeArraySizeException on commiting a transaction

during string writing. What are the sizes of strings in that object and what character set is used ... another PlacementBlockModel. The issue is rather connected to the size of the entity being written. As u can see in the screenshots, the size of the byte[] on which objectDB operates is above 1GB

impossible to drop a table with 50 million objects

when trying to execute in explorer (max heap size 1GByte) delete from LogEntry l it comes ... Zwicker This may be because the transaction size is limited by the heap size. You can try deleting ... transaction size above the heap size. See #10 in that issue thread for the requires setting

Backup file always bigger than live db file

Does the database file itself remain the same size? Is the backup size different (either smaller or larger) from the database file size, or just the compressed (e.g. zip) versions become larger over time? support Support It seems it is only the compressed file size that is getting bigger. The DB file


exception? Please check the database with the ObjectDB Doctor. Are there any errors? What is the size of the database? What is the size of the page cache, as specified in the configuration. Can you identify ... the problem. Result from ObjectDB Doctor check is attached. The size of the database is cca 42 MB

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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