Hey, all.
I was just looking over the DSpace tuning guide[0] and I got to reading
about garbage collectors. Ubuntu {12,14}.04's Tomcat 7 both use the
ConcMarkSweep garbage collector, but I wonder if we should be using Java
7's new G1 garbage collector, as JDK7 has been out for a few years now
and there are some impressive numbers with G1GC[1][2].I'm currently using the following JAVA_OPTS on my dev/production servers where the repository has ~20,000 items: -Djava.awt.headless=true -Xms1024m -Xmx2048m -XX:MaxPermSize=320m -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode We're moving to newer servers soon (Linode, 6 CPUs, 8GB RAM, from a pretty slow Ec2 m1.medium), so we'll see much more performance anyways, but I'll be experimenting with different parameters there as our repository is becoming increasingly important and heavy (~500,000 hits per month). Cheers, [0] https://wiki.duraspace.org/display/DSDOC4x/Performance+Tuning+DSpace [1] http://blog.sematext.com/2013/06/24/g1-cms-java-garbage-collector/ [2] http://www.aioug.org/sangam12/Presentations/20155.pdf -- Alan Orth alan.o...@gmail.com http://alaninkenya.org http://mjanja.co.ke "I have always wished for my computer to be as easy to use as my telephone; my wish has come true because I can no longer figure out how to use my telephone." -Bjarne Stroustrup, inventor of C++ GPG public key ID: 0x8cb0d0acb5cd81ec209c6cdfbd1a0e09c2f836c0
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