Hi, I am working on MonetDB Feb2009SP2 compiled and run on windows64 from CVS. After Creating a 40 Million row table, I did a series of ADD COLUMN and UPDATE operations on all 40M rows. After a few update queries the server crashed. I noticed that for each query a lot of memory was allocated, but not all of it freed after the query returned, so that after each update query the total amount of memory used by MonetDB has gone up, until eventually the server crashed. (The machine is 64 bit with 8GB of RAM) I then tried to reproduce it on a smaller database with 20 Million rows. I ran this query over and over: UPDATE testtable set testtable."MonthColumn" = "month"("DateColumn"); This too eventually crashed. I attached an image of the memory consumption from task manager that was taken right after the crash. http://www.nabble.com/file/p23984181/MonetMemory.jpg Any ideas on why this happens and how I can work around it? Is it at all a memory issue like I suspected? Thanks. -- View this message in context: http://www.nabble.com/Crash-after-recurring-column-updates-tp23984181p239841... Sent from the monetdb-users mailing list archive at Nabble.com.