ObjectDB Database Search

files access and only part of the virtual file is in the virtual server's cache . Have you ever heard ... and only part of the virtual file is in the virtual server's cache . Have you ever heard ... caching of the database file is the reason seems reasonable and maybe this could be solved

manager A couple of questions about this: 1. the first evictAll() seems to be clearing the L2 cache ... is a bit tricky. pmf.getDataStoreCache().evictAll() clears the L2 cache . pm.evictAll() clears the persistence manager (L1) cache . But evictAll does not affect objects that have been changed by the current

stored in memory that assists in searching on indexes?  Are they cached in any way? Here's a bit ... ;  ObjectDB version 2.37_22. Thanks in advance. cvtsc Dev Team There is no special cache for indexes. Pages that contain indexes are cached in the page cache , exactly as pages that contain data. Try

to around 30% when the number of entities was just half of the current). We tried to optimize the cache settings, current objectdb.conf is: Now the question is, are there settings to change the caching ... Support great, that helps, just to be sure for the cache settings, as normal, the bigger, the better (or

) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] at org.jboss.as.ejb3. cache ... ] at org.jboss.as.ejb3. cache .impl.backing.NonPassivatingBackingCacheImpl.create(NonPassivatingBackingCacheImpl.java:97) [jboss-as-ejb3-7.1.1.Final.jar:7.1.1.Final] at org.jboss.as.ejb3. cache .impl

off caching ??) 2. do I understand correctly that if object x is modified and persisted by process B ... it??   dmoshal David Moshal You can disable the L2 cache (or empty it with evict ) and empty the EntityManager (L1) cache by invoking clear . JDO provides some additional settings in which objects

.domain.entity.psql.DialogNew at com.google.common. cache .LocalCache$Segment.get(LocalCache.java:2201) [guava-16.0.1.jar:] at com.google.common. cache .LocalCache.get(LocalCache.java:3934) [guava-16.0.1.jar:] at com.google.common. cache .LocalCache.getOrLoad(LocalCache.java:3938) [guava-16.0.1.jar:] at com

kind of glitch with sharing page cache ? lwalkowski Lukasz Walkowski Could you please provide ... caching activities but it is unclear what share can be released by the GC and what cannot be released. In addition, please post the ObjectDB configuration file (to show cache sizes, etc.). support Support

Santos This could be the result of getting query results from the cache . There is no difference between criteria queries and string based JPQL queries regarding the cache (and actually every criteria query it converted by ObjectDB to JPQL). But some cache operations cannot be used with queries

this is the most expensive resource. However, the persistence context, i.e., the first level cache that an EntityManager holds is not preserved or reused. Is may be worth reusing these caches as well in some ... level cache and the described conflict if other entity managers use the same objects at the same time

  Thanks in advance   Regards nedim.selmanovic Nedim Selmanovic Do you mean for cache ? ObjectDB can benefit from any available RAM: By the operating system cache that may include all or significant parts of the database. By increasing the ObjectDB cache sizes in the ObjectDB configuration

and delete queries bypass the persistence context and therefore may cause various cache issues ... again. Trianglehead Json Error This might not be related to replication but to cache in general. DELETE and UPDATE queries bypass the persistence context and the cache , and therefore, an extra caution

.fetch(ResultSet.java:189) at org.eclipse.birt.data.engine.executor. cache .OdiAdapter.fetch(OdiAdapter.java:214) at org.eclipse.birt.data.engine.executor. cache .RowResultSet.fetch(RowResultSet.java:145) at org.eclipse.birt.data.engine.executor. cache .RowResultSet.doNext(RowResultSet.java:118) at org

cache configuration:    level2="0mb" - 20 msec query    level2="2mb" - 10 msec    level2="10mb" - 40 msec Question: why is a larger level2 cache worse than no level2 cache , ie 10mb worse than 0mb? 2) (separate issue) I'm noticing that write queries are around 20-50x

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager CacheStoreMode getCacheStoreMode() The cache storage mode for this persistence context. Since: Jakarta Persistence (JPA) 3.2

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.SharedCacheMode UNSPECIFIED Caching behavior is undefined: provider-specific defaults may apply. Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.SharedCacheMode ALL All entities and entity-related state and data are cached . Since: Jakarta Persistence (JPA) 1.0

Jakarta Persistence (JPA) Enum Constant in jakarta.persistence.SharedCacheMode NONE Caching is disabled for the persistence unit. Since: Jakarta Persistence (JPA) 1.0

Hello , I need advanced caching system. Terracotta ehcache provides us , advanced distributed cache mechanism.   Can we use objectdb with ehcache ?   kadirbasol Kadir BASOL ObjectDB uses its own non pluggable cache , so currently it cannot be replaced with another cache

getting data from the L2 data cache (e.g., due to limited RAM and large cache that might be swapped to the disk?). Try to disable the L2 data cache or decrease its size, assuming you use it. support Support Our second level cache is not activated: Do you have another explanation? btc_es BTC

the application cache only some embedded parts of those objects (let's call them class B). This application cache should work independently on the DB as if it contained transient objects. However those instances ... the application point-of-view. So as long as I keep B in application cache , also A is present in

is tight, you may have to reduce the sizes of the processing cache , the L2 data cache , and the query results cache . support Support

. Do you have another idea? btc_es BTC EmbeddedSystems In that case, maybe it is related to the query cache , although such an issue is not expected. You may try disabling the query cache to see if it helps ... with the deactivated query cache works. But the question is now why? The DB Doctor does not show errors

, the problem now is different. Could you please post your objectdb.conf file? The database cache ... which was enabled in default conf: madhuarish Bhanu Pathak The cache should be 64MB per open database, so assuming you have one open database there is a cache memory problem. The heap dump may help in

to perform some custom code when instantiating the object i can keep the cache and make sure that in any ... have this feature, (and L1 or L2 cache is not a guarantee that i'll get the same object ... to perform some custom code when instantiating the object i can keep the cache and make sure

. For example, the  EntityManager may not be aware that a cached entity object in its persistence ... more the SQL way than the JPA way. Clear the internal EntityManager cache by using clear after an UPDATE query and before retrieval or a specific object using refresh , and disable the 2nd level cache

Processing (server side) cache size Query cache size Client side cache settings You may try each

. we wonder if the cache and other settings can be optimized to get the most performance ... general:temp:threshold value can reduce temporary files usage. The L2 cache does not always help so you can try with and without (i.e. disabled). The query result cache is effective if your application

SSD could help. Increasing the page cache may help. By running replications of your database ... we already have a 2GByte page cache for a 30 GByte database file. Should we increase ? Database is on SSD ... ;     hgzwicker Hans-Georg Zwicker Increasing the cache may help, so you may want to try

Ken If you could retrieve old objects but not the recently stored objects then this could be a cache ... cache is enabled. support Support Your test demonstrates a bug in the ObjectDB query program cache

:591) at com.objectdb.jpa.EMImpl.find(EMImpl.java:514) at com.ysoft. cache .objectdb.ObjectCacheDB.deleteInOpenTransaction(ObjectCacheDB.java:361) at com.ysoft. cache .objectdb.ObjectCacheDB.delete(ObjectCacheDB.java:356) at com.ysoft. cache .objectdb.ObjectCacheDB.delete(ObjectCacheDB.java:347) at eu.ysoft

the filesystem. I would like to enable the level2 cache for all entities:  https://www.objectdb.com/java/jpa/setting/entities#The_ cache _element a) Is it possible to configure this 

don't have the cached Document and then find the Document by Id. - At that point the Document ... because I have the cached value of the Document returned.   @Entity public class Document { private

bug in transaction isolation or cache management. Anyway, a test case that reproduces the problem ... it has something to do with something being cached or not cleaned up after the creation.   I can't

are per database. For example, the default cache size for database pages is 64GB per database, or 6.4GB per 100 databases, so it can easily exceeds your VPS RAM. If you must keep 100 databases open concurrently then you will have to reduce cache sizes, etc. support Support

Configuration : ObjectDB Version: 2.8.8 VM Total Memory: 90GB ObjectDB Configuration: Processing Cache ... the server is started. I have already tried reducing the processing cache and monitoring system resource

of field field eu.ysoft.safeq.core. cache .entity.CacheableJobStat.jais using enhanced method at com ... .core. cache .entity.CacheableJobStat.__odbGet_jobId(CacheableJobStat.java:1) at eu.ysoft.safeq.core. cache .entity.CacheableJobStat.toString(CacheableJobStat.java:136) at java.lang.String.valueOf(Unknown

infrastructure ( cache releated classes? ) that was built up during reading and now ... should be better done inside the DB if possible. btc_es BTC EmbeddedSystems ObjectDB manages several cache data structures: Page cache Query caches Entity caches You may use the above links to the see default

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 (page caches of the 2 other databases

is related to dilution of pages from the page cache when it becomes too loaded, but the reason ... traces may indicate an infinite loop in purging pages from the cache , i.e. #1 and #3 indeed reflect ... of cached pages contains a circle since there are no other apparent reasons. With no test case

internally. I've tried reducing the query- cache programs setting but this made no difference (I'm ... behind the test is to create a data cache to prevent the need for large data to be held in memory. The data ... the cache . thumbripper Richard Szurgot Your test demonstrates a failure of ObjectDB in evaluating

because the objects are kept in the first level cache of ObjectDB. In the forum thread http://www.objectdb ... the first level cache (by flush() and detach()). But an array of bytes, any ObjectDB memory ... after clear. And the heap reached its limit after x flushes. I believe the byte arrays are the db cache pages

.PersistenceException Failed to read from file 'C:\SafeQORS\server\ cache \MainORSCache.odb' (error 117 ... ) at com.ysoft. cache .objectdb.ObjectCacheDB.deleteInOpenTransaction(ObjectCacheDB.java:361) at com.ysoft. cache .objectdb.ObjectCacheDB.delete(ObjectCacheDB.java:356) at com.ysoft. cache .objectdb

The two thread dumps show two different waiting situations. The first thread dump shows a page cache lock ... at the ObjectDB level. There is a query cache of course, but it is useful for getting query results quickly ... . The objects that are added to the heap are related to: (1) the L2 cache , (2) the query caches

if possible. felixobjectdb Richard Szurgot It was a bug in the page cache . This cache can hold ... when the operation has started). You cannot disable that cache since it has a minimum size even if you request zero ... ) - the page cache could purge newer version of a page leaving older versions for use by newer users

.core. cache .entity.CacheableJobInfo.__odbGet_id(CacheableJobInfo.java:1) at eu.ysoft.safeq.core. cache .entity.CacheableJobInfo.getPrimaryKey(CacheableJobInfo.java:828) at eu.ysoft. cache .cluster.bucket.Bucket.add(Bucket.java:36) at com.ysoft. cache .objectdb.cluster.bucket.ObjectCacheDBBucketManager

. Both have been updated yesterday, possibly when the error was generated. So this time it might be a cache issue ... of database corruption, and in the worst case restarting the system to clear all cached data may help, for now ... out whether a cache is involved or just a bad managed collision. It is also possible (in the optimal

databases are 3 "queue" databases and 3 normal databases). I'm running with the following cache ... lose any benefits of caching around the metadata as soon as a large object is loaded? Are there any ... also the servers, with different configuration (page cache size, query cache size) for the metadata server

.java:591) at com.objectdb.jpa.EMImpl.find(EMImpl.java:514) at com.ysoft. cache .objectdb.ObjectCacheDB.deleteInOpenTransaction(ObjectCacheDB.java:361) at com.ysoft. cache .objectdb.ObjectCacheDB.delete(ObjectCacheDB.java:356) at com.ysoft. cache .objectdb.ObjectCacheDB.delete(ObjectCacheDB.java:347

.java:686) at com.ysoft. cache .objectdb.ObjectCacheDB.search(ObjectCacheDB.java:522) at com.ysoft. cache