ObjectDB Database Search

it up?       Stefan Stefan Mair Your test becomes slow as the database is filled

Slow performace in virtual machine

Queries are slow on a large database

. However, even with an index, executing a query to load a field is relatively slow

might be slow if the database is large. Replaying transactions The ObjectDB Replayer tool

so wrong that virtualization from the market leader VMware slows everything down so much? Priiiiil ... the hardware. If you can publish diagnosis info of the slow activity it might help. support Support Thank ... OutOfMemoryError , so maybe it is just slow because the heap size is large. Given that the database

the objects (around 5s) and I think I do something wrong because it's so slow . (DB has around 30.000 rows ... no difference. edit2: persisting values is also very slow (5-6s for 30.000 inserts). Environment

to do and why they are so slow , when this happens. For this CPU and thread profiling, e.g. from VisualVM ... another createEntityManager immediately when it happens, will it also be slow ? Maybe it could be useful to check

the way, creating an  EntityManagerFactory is relatively slow . It is usually better to use

and restart the application with the same DB, I see the original behavior (working but slow ).  

If by expensive you mean slow then it is not that expensive. You can use external validation libraries, but they will not be faster. support Support

- and that is slow if you have millions of objects. Currently the workaround is to use queries

. Sometimes enabling the L2 cache may slow the application because of the overhead in keeping

Hi, We are currently using db4o with a commercial licence, but finds it very frustrating after they have been taken over by Versant. The development of db4o is going very slow and major bugfixes are not been backported to stable releases, but only put into bleeding edge branches.  

and your sample test passes. However, please note that: It may slow your application. Object IDs

slow - that is expected, because of some high number of objects to download. I forget to mention in

that a full scan query plan is used (which is very slow ), as effective indexes cannot be used

hi, my current use case is: execute unit test, verify results in explorer. my problem, i have to close the explorer before every run, and open it again after the tests are done. this slows down the whole process. i opened the database in readonly mode, but the file will be locked by the explorer

and the server is slow ). If you specify a String instance as the target parameter

Hello, we have a question again regarding query performance. The query: SELECT v FROM Values v WHERE v.step.stepNumber = ? is very slow in comparing to the query: SELECT v FROM Values v WHERE v.stepNumber = ? Can you explain why the first query needs so much time or do you have a hint

all) are affectet which results in a slow but increasing memory consumtion of our server

.)   Pseudocode for the fast and the slow solution FAST: for (i = 0; i

in queries lead to performance penalty, how slow is it and would you recommend something better

We have a big entity object tree in our project. If I use the entityManager.remove(childEntity) method to remove a child entity a entityManager.refresh(parentEntity) is necessary in order to have an updated parent/child object tree in memory. But entityManager.refresh is too slow for our project

Steve Zara Development of JDO in the recent years is slow , and there are only a few JDO features

but might be slow if the database is very large, and may cause issues if there is no sufficient space

that are not related to query execution timeout and if there are side effects such as slowness ... seconds timeout set. At the times when the timeout happens the system is very slow hgzpincher Hans ... info that should be removed). Obviously queries that need more than 100 seconds slow

that it is indeed very slow . Could you please provide a typical value for the ?1 (end date) parameter ... slow as using this composite index doesn't solve the problem, so further work is needed. Will keep you informed. support Support As discussed above, the reason that this query is very slow is not

. If you need help with selecting query plan hints to optimise other slow query plans we can help ... on a better solution proceeds. If you can provide several different queries (that are known to be slow

setting, it is more or less not acceptable to slow down the system like this hgzwicker Hans-Georg Zwicker File sync is a slow operation so this is expected. Although we cannot improve the speed

, and should be used only if there are no other options. It is also slow . A much better solution (faster