I tried creating a detailed report for the shelby county all buildings version 5 and I got an out of memory exception using 1200m as my max memory argument.

Exception in thread "Thread-5" java.lang.OutOfMemoryError: GC overhead limit exceeded
at java.lang.StringCoding.set(StringCoding.java:53)
at java.lang.StringCoding.decode(StringCoding.java:171)
at java.lang.String.<init>(String.java:444)
at org.postgresql.core.Encoding.decode(Encoding.java:193)
at org.postgresql.core.PGStream.ReceiveString(PGStream.java:320)
at org.postgresql.core.v3.ConnectionFactoryImpl.readStartupMessages(ConnectionFactoryImpl.java:460)
at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:99)
at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:124)
at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
at org.postgresql.jdbc3.Jdbc3Connection.<init>(Jdbc3Connection.java:24)
at org.postgresql.Driver.makeConnection(Driver.java:386)
at org.postgresql.Driver.connect(Driver.java:260)
at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:37)
at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:290)
at org.apache.commons.pool.impl.GenericObjectPool.addObject(GenericObjectPool.java:996)
at org.apache.commons.pool.impl.GenericObjectPool.ensureMinIdle(GenericObjectPool.java:978)
at org.apache.commons.pool.impl.GenericObjectPool.access$000(GenericObjectPool.java:124)
at org.apache.commons.pool.impl.GenericObjectPool$Evictor.run(GenericObjectPool.java:1090)
at java.lang.Thread.run(Thread.java:619)
670103 - [ERROR] [ncsa.gis.jobs.SimpleTaskJob]: Task Execution Failed
java.lang.OutOfMemoryError: Java heap space
at java.util.ArrayList.<init>(ArrayList.java:112)
at java.util.ArrayList.<init>(ArrayList.java:119)
at com.lowagie.text.Phrase.<init>(Phrase.java:194)
at com.lowagie.text.Phrase.<init>(Phrase.java:173)
at ncsa.gis.report.elements.TableReportElement.generateTable(TableReportElement.java:233)
at ncsa.gis.report.elements.TableReportElement.renderElementToReport(TableReportElement.java:85)
at ncsa.gis.report.elements.BaseReportElement.renderToReport(BaseReportElement.java:393)
at ncsa.gis.report.elements.BaseReportElement.renderToReport(BaseReportElement.java:395)
at ncsa.gis.report.render.ReportRenderer.renderReportTo(ReportRenderer.java:65)
at ncsa.gis.reports.ui.types.ReportRunner$1.execute(ReportRunner.java:38)
at ncsa.gis.jobs.SimpleTaskJob.run(SimpleTaskJob.java:25)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)