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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. #1 2012-04-26 12:56 We are running load testing against objectdb version 2.3.7_18. The performance is generally OK, however there are ...

 
forum_thread

WebService : Failed to get reference value of field using enhanced method

Hi, I try to use objectdb from Tomcat Webservice without webservice it's works fine:   error: Failed to commit transaction: Failed to get reference value of field field persistence.PolicyEntity.policyString using enhanced method ... <!– added for loading libraries files from the lib folder inside aar file –> <parameter ...

 
forum_thread

Which storage fits best to ObjectDB?

Hi, we are just about to put together a new server for our applications using ObjectDB (v 2.6). We have a dilemma about the storage holding the ObjectDB files: if to invest in a mirrored RAID of SSDs which is clearly the ultimate solution but it quite pricey, or to choose a RAID5/6 of 7200 RPM HDDs. ... We have a dilemma about the storage holding the ObjectDB files: if to invest in a mirrored RAID of SSDs which is clearly the ... we would need to know how ObjectDB is reading/writing the files. The tests are showing that the HW RAID5/6 of HDDs deliver comparable ...

 
forum_thread

Failed to commit transaction: Java heap space (error 613)

Hi, the following exception occurred in our production machine last night: 2013-07-17 20:41:46,665 pdnsrttor3rc42-WSAgent-2-Existing/16 ERROR ObjectDbMessagePipe - Failed to put a message on queue:  pdnsrttor3rc42-ReportDSGroup_Instance-2 retrying = true [ObjectDB 2.4.6_10] javax.persistence.RollbackException Failed to commit transaction: Java heap space (error 613) We are using ObjectDB 2.4.6_10, JDK 7, and a 30GB heap space. #1 2013-07-18 11:31 Hi, the following exception occurred in our production machine last night: 2013-07-17 20:41:46,66 ...

 
forum_thread

ObjectDb.conf Defaults

Is it expected that all objectdb.conf entries are optional and when they are not provided defaults are used?  It appears that that is the case for all documented entries, except for 4 entries under "General". ... ; import java. nio . file . Files ; import java. nio . file . Path ; import ... "objectdb.conf" ) ; if ( Files. exists ( objectDbConFile ) ) System. out . ...

 
forum_thread

How force always recreate database on redeployment.

Is there some easy way to force recreation/deletion of the current database on deployment of a web application (to Glassfish). My web application uses a @Singleton @Startup bean to create and persist a test model each run. I keep getting models on top of each other on rerunning my web application. Currently, to avoid multiple models in the database, I have to undeploy from Glassfish, stop the server, delete the database file, re-start the objectdb server, re-run the web app, which is tedious. #1 2012-03-03 09:32 Is there some easy way to force recreation/deletion of the current database on deployment of a web application (t ...

 
forum_thread

Recursive calls with @PreUpdate annotation and Glassfish OutOfMemoryError

Hi,    I've had an issue that started today and it's got me stumped. I've got a subclass User, which extends a BaseEntity. The BaseEntity has a @PreUpdate as per: #1 2011-07-07 16:55 Hi,    I've had an issue that started today and it's got me stumped. I've got a sub ...

 
tutorial

Step 2: Entity Class and Persistence Unit

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the project node (in the [Package Explorer] window) and selecting  New > ...

 
forum_thread

Vacuum - Reclaiming Unused Space In Odb

I was curious if you could assist me with a challenge we are having with our objectdb database.  Our odb files are about 50Gb in size and are written to about a million times a day with both adds and updates.  This is creating a lot of unused space in the database that we are wanting to reclaim.  Other database vendors provide a vacuum process to allow dumping a database to a flat file (basically a sql dump) and reload.  Is there a capability in ObjectDb to provide a vacuum?  The online backup feature appears to copy the dead space as well so isn't performing... we are having with our objectdb database.  Our odb files are about 50Gb in size and are written to about a million times a day ...

 
forum_thread

ObjectDB 2.x is working without any activation code

Hi, I downloaded the objectDB from the http://www.objectdb.com/object/db/database/download and then added the objectdb.jar in my classpath. I used the default objectdb.conf file present in the objectdb.jar file and it is working without any activation code.. Is it is bug in objectdb or it works without actionvation code also. I am saving some information into the some.odb file and reading the informatin without any problem. What exactly is the activation code for ? Thanks & regards, #1 2012-07-23 12:50 Hi, I downloaded the objectDB from the http://www.objectdb.com/object/db/database/download and then&n ...