title: Liquibase, "Migration Failed: Java heap space" error when generateChangeLog with "data"
body: <p>I am trying to create a baseline on one of my development database using liquibase, here's my environment
  - Database, -> Oralce 10g, with 500+ Tables with lots of configuration data, the oracle export dump file is about 70mb;
  - Java - Java 6
  - Oracle JDBC Driver - ojdbc14.jar (downloaded from Oracle web site)
  - Command line execute
  liquibase --changeLogFile=base.changelog.data.xml --diffTypes="data"  generateChangeLog</p>
  
  <p>Execute result:
  - Liquibase is configure to run with "-Xmx512m -Xms256m" jvm parameters, fail, error message - "Migration Failed: Java heap space
  "
  - configure to run with "-Xmx1024m -Xms512m", same error occurs
  - configure to run with "-Xmx2048 -Xms512m", same error</p>
  
  <p>What other options I have in oder to create base line for my development projects, so that we could start version control our db..</p>
  
  <p>Appreciate ur advise, thanks!</p>
  
  <p>James</p>