That's the biggest, especially for when it's a Facebook company. Otherwise it works well but can be pricey.
The JVM is getting a new fully concurrent collector though called Shenandoah: https://www.google.com/search?q=shenandoah+gc
1. https://wiki.openjdk.java.net/display/shenandoah/Main 2. https://wiki.openjdk.java.net/display/zgc/Main