jacques-n commented on a change in pull request #2531:
URL: https://github.com/apache/calcite/pull/2531#discussion_r719651497



##########
File path: gradle.properties
##########
@@ -14,7 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-org.gradle.jvmargs=-Xmx512m -XX:MaxMetaspaceSize=512m
+org.gradle.jvmargs=-XX:+UseG1GC -Xmx512m -XX:MaxMetaspaceSize=512m

Review comment:
       If you profile the gradle daemon build using old and g1, g1 performs 
better. It more effectively clears things away. The patch builds with either 
though. 
   
   In general, the gradle settings seem low given the amount of continuous 
memory builds take. In many cases I see non trivial amounts of time against gc 
while profiling. 




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