ObjectDB Database Search

around a persistence-manager. We start to make them stateless and to increase performance the persistence-managers ... the over-all performance ? sorry for bothering you best regards Arne   Arne Arne Stocker As it is usually the case ... the persistence context). However, whether it improves performance or not depends on too many factors

fast inserting the elements, but when it comes to read seems like the performance falls. I ... to perform massive reads? ksii13 E ObjectDB is faster than other DBMS, not just in writing but also in ... your own HashMap cache in memory for specific objects if you need the extra performance . But note

(disk)? Can setting sync=true (for recovery) help with this issue, how will be the performance ... , but you may lose some operations that have been performed after that point. Enabling sync reduces the risk of data loss significantly at the possible cost of performance (the exact effect depends

performance hit. Problem 2: executing a query that returns User with id 5,6,7 (or any other) takes fresh data ... Chirac The purpose of the L2 cache is to improve performance mainly by minimizing client server round ... without performance penalty. You can change this behavior by setting the  "objectdb.result-fetch" query hint

of the performance problem. The ObjectDB cluster may be a distributed database, I guess. But I dont know ... does) to support larger databases, but that will come with a price tag of slower performance . In ... is on the slave side only. support Support but that will come with a price tag of slower performance . 

?  The online backup feature appears to copy the dead space as well so isn't performing ... We are trying to optimize the database size due to the time it takes to perform an online backup ... window of time to perform these backups.  We've looked into using the replication strategy

us resolve this and ensure your data remains healthy, could you please perform the following steps? 1 ... a specific fix to avoid the exception you encountered. It includes numerous stability and performance improvements released since your current version. Once you have performed the repair and the upgrade

are easier to perform . Intuitively, I created an entity class called player and stored ... objects improves performance by eliminating the need to persist and retrieve small pieces of data ... , so if you already have tests that check the performance of your application, you should use them to check what is better. support Support

; While this improved query performance considerably, we have noted that our database application ... the temporary file threshold , but that may slow performance . To understand the problem better ... thread pool in order to get good performance for our 8-core server?   cvtsc Dev Team If you have 30

-server connections. support Support What about database access performance (read/write speed ... The first process will have the performance of embedded mode and the others will have the performance of server mode, which is slower. support Support Brilliant! I can confirm that using undocumented

My application is not meeting required performance because JavaDB appears to be my bottleneck ... keeping current?  If they can meet my current needs (EXTREME performance is required) then maybe ... , but they have their market, especially when performance is essential. ObjectDB is here to stay

I'm curious about the trade offs between JDO and JPA. Seems to me that JDO will perform better ... of static typing with the JPA version, is there a performance hit? ie: with the JDO version ... .customer) ? If no performance difference, then JDO wins due to static typing, in my view. dmoshal David

Hi, We are trying to create a servlet that performs database online backup. Unfortunately, even though no exception is thrown, backup files aren't created. When I turn on DEBUG logging in ODB, I ... home directory on db server.   I also tried to perform backup from standalone application

becomes more complex. Such changes must be performed with great care. When ObjectDB starts after the refactoring ... operations that were performed would help us better understand and diagnose the issue. support Support

side). Regarding performance , it may improve performance of adding / removing readers, but traversal from

Support Do I have to make this change on the server? How does this affect performance ... performance a bit or may not, but if it eliminates the issue it will help for diagnosis. It is definitely

was modified with: But after few benchmarks I don't really see any difference in performance . ODB ... and then check if it is cached. The L2 cache doesn't always improve performance . It depends on the application

fixed an issue with queries ( issue #2858 ) but had a known query performance regression. It was fixed in version 2.8.9_02 but maybe there is another relevant query performance regression

) 3) use jdo from jpa - is there a performance penalty for unwrapping PersistenceManager.class ... David Moshal 3) use jdo from jpa - is there a performance penalty for unwrapping PersistenceManager

of one writer and multiple readers provides better performance because the coordination between the servers ... including better performance , full ACID, richer queries and rapid development. support Support

to the odb file in order to improve the performance . As long as the data is written to the recovery ... ; , but is is expected to decrease the performance . The  .odr files are related to the recording

it: As the embedded DB seems to be with superior performance would you recommend using it with TomEE ... mode is faster, so embedding ObjectDB in the main Tomcat server will improve performance

) and it also leads to performance penalty. support Support Thank you for your fast reply. I really meant ... in queries lead to performance penalty, how slow is it and would you recommend something better

, how to test the real performance of objectdb? The structure of my class is ::=( , , , , ), why "any ... gzdillon Lai Yang Sure. You should test the performance of ObjectDB with real data

I have an application that I have been converting from JPA/MySQL to JDO/ObjectDB and I have hit a problem with indexing. An index on a String field is required to give good performance but if I add ... versions, as we have had positive experiences of the performances of object databases and JDO

Hi, I have a 12GB database with 787603 entries. It is much larger than usual and there are performances issues. I am doing small queries and they take much longer than I expect, i.e.: Get the total ... and the performances are much better. I will try composite index later. However there is one thing I haven't

. A simple action that can improve performance dramatically, is to avoid using mapped by collections ... runs are faster than the 1st. If you need to improve performance further, consider replacing

, so it should be possible to get at least similar performance for this query with ObjectDB 2.x. Maybe ... that demonstrates this performance problem. Your other question will be moved to a separate forum

? 4410 Arsenii With enhanced classes you may get much better performance . Enhancement is very easy ... after every commit , to avoid further performance loss over time. support Support Well, I'm using Spring Data JPA

/java/jpa/query/setting#Flush_Mode_setFlushMode support Support Thanks, The part about performance in documentation is so true. I think I'll stick with map to check for duplicates, as performance drop is like 20x - just tested. lwalkowski Lukasz Walkowski

for this purpose. Use enhanced classes to get best performance in reading and writing the objects. The impact of object instantiation on performance should be minor. support Support

Well ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah again :( ). Here is the test case : 1- Create 100 000 entities with for each 1 entity with @OneToOne(mappedBy ... , go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. So my performance

where just deleted on which we applied indexing. We found a solution for this past performance problem and didnt try with indexes any more until now when we have another performance issue which we believe

to perform some custom code when instantiating the object i can keep the cache and make sure that in any ... to perform some custom code when instantiating the object i can keep the cache and make sure

(because it is stored on an Amazon EBS disk which has max performance at that size and reduces monetary fees by having ... on an Amazon EBS disk which has max performance at that size and reduces monetary fees by having fewer

since it requires query execution. Usually you can get better performance by using two unidirectional  ... ) is not supported by ORM JPA implementations, so you will be leveraging the performance advantage of ObjectDB. support Support

We get an internal objectdb error, when we execute a flush. Why? What's wrong? It performs with version objectdb-2.6.4_04. It does not perform with version objectdb-2.6.6_04.   Caused by: com.objectdb.o.InternalException: Unexpected internal exception at com.objectdb.o.JPE.h(JPE.java:168

(which requires some re-coding and has performance consequences when large relationship hierarchies ... all the benefits of lazy loading of course. 2. Perform the query within a @Stateful session bean

, how much performance improvement would bring a switch to a single long? btc_es BTC EmbeddedSystems Unfortunately ... if a composite of two longs can produce any performance gain over a single string. support Support

indicating deep query plan checks and an overall significant performance loss in all queries ... . Decreasing the number of query plans can solve the performance issue in this specific case ... it would be useful (although that change improves performance in other cases). What is the purpose of updating

Thank you for this bug report and for the test. Version 2.3.1 fixes the exception. Some performance tips for this test: You can improve persist performance by using smaller transactions (commit ... (because it would consume less RAM). You can improve query performance by retrieving field values rather than entity

.  There are options such as using an encrypted file system, but you will pay a performance penalty.  This also means that the entire DB is encrypted which is okay, but if performance is an issue ... to be encrypted, so performance for the majority of the system would not suffer, but there are very critical

; Perhaps there is some performance tradoff with this update to save memory usage? In the attached ... this update) and see if there's a performance difference. Trianglehead Json Error Just an update

performance may be improved by: Enhancing the code. Using embedded mode instead of client server mode ... is performing very well now that I have adjusted my executor and allowed for enough time for the worker

integrity has a performance overhead. If during tests the application doesn't create dangling ... at runtime improves performance at a minimal risk. support Support

we faced a poor performance of objectdb last week, during that time frame we have this message in the log: ... [2019-03-01 11:53:40 #5 store]  RetrievalTask.reportPrimaryResult0: page#27184134 ... info. It is possible that the same exception is related to the performance issues and to the writing

this to improve performance , but of course - ObjectDB must be able to handle such activity without errors ... , but it seems that switching to SEQUENCE or TABLE  would provide better performance than flush after every persist . support Support

the system is permanently under heavy load. Recording affects the performance significantly, right ? hgzwicker ... to use the recording as the system is permanently under heavy load. Recording affects the performance

performance of database insert/update/delete operations. Changed default configuration (for improved performance ). Added support for running a server with no tray icon (using a -console flag). Changed

, the index on the "name" field will also be ignored, and a full scan will be performed instead ... and then using single field indexes. support Support Update: Performance regression in build 2.8.9_01