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db4o open source object database, native to Java and .NET
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  • Performance Issue while storing 200 similar Objects.

    Hello, I am new to db4o usage. In our standalone java product we are using db40 6.1. i got problem while stroing 200 objects into db (single file which had 322,454 kb data) in multithreaded way and it took 30 sec to 1 min for each insertion. db opens at the time of product launch and closes when exit only. -----NullPointerexception at ...
    Posted to Performance Forum (Forum) by pady on December 6, 2008
  • Explicit transition to "activate and query" mode

    With LINQ to SQL, the query model is very explicit: if you make a query that can't be performed in SQL, an exception is thrown:    var results = from user in database.Users                     where Fobnicate(user.Name) == Fobnicate(''Jim'') // Exception: no SQL equivalent of Fobnicate                     select user;      But with DB4O, no ...
    Posted to Performance Forum (Forum) by JudahGabriel on November 3, 2008