About drop

issue

Negative snapshot user count

I finally hit an instance of the "Negative snapshot user count" exception 1) ... ( "objectdb:$objectdb/db/test.tmp;drop" ) ;   EntityManager em = emf. ...

 
forum_thread

locks on pure query activities

analyzing the dynamic behavior we can see from the thread dump that a lot of our threads that are just doing simple queries show locks like these (question is: why there are locks and how could we get rid of that):   log1:   ... programs = "500" /> <extensions drop = "temp,tmp" /> </database >   <entities ...

 
forum_thread

OutofMemory error with Object DB 2.0

Hi, I am getting the below OutOfMemoryError after I have migrated from objectdb 1.0 to 2.0 The application works with 256MB heap size with objectdb 1.0  But on 2.0 even with max heap size of 1024MB, I get this error. The application reads xml file of around 1GB and creates a new odb file and inserts 200 records at a time. ... programs = "500" /> <extensions drop = "temp,tmp" /> </database >   <entities ...

 
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Occasionally slow requests in load testing

We are running load testing against objectdb version 2.3.7_18. The performance is generally OK, however there are quite a few "spikes" in the performance where we are getting a lot of very slow response times from the DB, around 10 - 15 seconds. Looking at the DB server process with AppDynamics we can see that most of the requests get stuck in one of 2 places: com.objectdb.o.PGC:w: line number 232 com.objectdb.o.LFL:U: line number 1068 Please see the attached callgraph examples for full stack trace examples. ... programs = "500" /> <extensions drop = "temp,tmp" /> <activation code = ...

 
forum_thread

Listing large number of complicated objects with paging.

Hi, For last few hours I was working on a problem with bad performance and memory problems with such a simple query: select prod from Product prod order by prod.id ASC Right now I have 55541 'Product' (attached to this post) entities in database and I'm trying to speed listing them with paging. The problem is, that running code that looks like this: ... ( "objectdb:$objectdb/db/test.tmp;drop" ) ; EntityManager em = emf. ...

 
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Activation Issue

Hi! We now reached the 10 class limit of ObjectDB. Our license is activated and if I run objectdb activation I get true back. When I start our webapp although I get the following error: ... "objectdb://localhost/db/test.tmp;drop" ) ; Metamodel metamodel = emf1. ...

 
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500Mb ObjectDb database opening issue

Hi, I have observed that 500 Mb objectDb database opening time is very slow (~3 seconds) for following code m_EntityMgrFactory = Persistence.createEntityManagerFactory( "objectdb:" + aFilename ); m_EntityManager = m_EntityMgrFactory.createEntityManager(); Does exist any way to speed-up open time for big databases? Definitely, it's too long for 500 Mb database! ... results="64mb" programs="500" />   <extensions drop="temp,tmp" memory="mem" /> </database> <entities>   ... results="64mb" programs="500" />   <extensions drop="temp,tmp" memory="mem" /> </database> <entities>   ...

 
forum_thread

Problem to use find method on an abstract Class: AbstractMethodError is thrown

Hi, I'm using JBoss AS 7 WildFly with ObjectDB installed as a module ( also Java 7, Eclipse Juno) In my db there are objects of type SentenceStatement which inherit from type LogicalObject  When I use find method mentioning SentenceStatement everything works just fine but when I use this method mentioning LogicalObject I get AbstractMethodError Please see services.Tester class with the 2 options for a better ease    this is the stack trace when I try to find LogicalObject: ... ( "objectdb:test.tmp;drop" ) ;   EntityManager em = emf. ...

 
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objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check") vs. generic classes with interfaces: detailed investigation

objectdb-2.6.9_02 (with "objectdb.temp.no-enhancement-crc-check" system property) The following is a detailed report on investigation of multiple issues that have been mentioned in the following forum postings and issue reports (but please do not visit them from here now, the diagnostics there are now obsolete): - Issue #282 - ObjectDB-2.6.9: Failed to commit transaction: Failed to set numeric value of field property Element.id using reflection ... ( "objectdb:db.tmp;drop" ) ; EntityManager em = emf. ...

 
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Dependency from enhanced classes to the objectDB library

Hello, we have a Question to the dependency from enhanced classes (required for license) to the objectDB library.... ( "objectdb:$objectdb/db/test.tmp;drop" ) ; EntityManager em = emf. ...