Yes, it’s using the default, which for Java 9 is G1GC, unless you’ve set something different.
In 7.9.8 we’re making G1GC the default for Java 8, too (unless you change the .conf file) because we didn’t realize how awful parallel GC is. 
Yes, it’s using the default, which for Java 9 is G1GC, unless you’ve set something different.
In 7.9.8 we’re making G1GC the default for Java 8, too (unless you change the .conf file) because we didn’t realize how awful parallel GC is.