Subject:Java Heap error and -Xmx param Author:Karen Powell Date:06 Feb 2008 12:09 PM
I'm currently testing a process which extracts lots of user data into user-centric XML files (from SQL database). In order to test we need to be able to run counts throughout a collection of XML files (circa 20-30 thousand). The size of individual xml files can range from 1k to over 500k (although this is rare) depending on how much data has been accumulated on a user.
We've been using stylus studio to run xqueries on this data and have had some success. Now though we have started to experience java heap errors early on in the execution of the xquery. Having googled for a while we found stuff on the -Xmx parameter and managed to enter in the parameter for JRE in the tools>Options section up to -Xmx512m. However, we still get the java heap error with this param. We have tried setting it at 1024 and above but when running the query get an different error stating saxon needs JVM 1.4 or later. We have 184.108.40.206 installed
We have also updated the Java settings via control panel to -Xmx4096m. Not sure if this is necessary.
Can anyone tell me why Stylus studio insists we run JVM 1.4 or later when we're on 1.6 and how we might resolve this java heap problem?
Subject:Java Heap error and -Xmx param Author:Tony Lavinio Date:15 Feb 2008 06:07 PM
Your message doesn't say which processor you are using. Assuming
DataDirect XQuery, each successive version of Stylus Studio has
included great improvements in handling of large data.
Could you tell us which release of Stylus Studio you are using?
Go to Help|About, and there should be a build number followed by
As an aside, -Xmx4096m is 4 gigabytes. I'm not sure how the JVM
will handle that, since 4 gigs is more RAM than Windows will let
a process see. -Xmx1500m is probably the highest, and that would
assume probably >2 gigs of RAM in the computer at least.