| # Copyright 2021 JanusGraph Authors | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| ################# | |
| # HEAP SETTINGS # | |
| ################# | |
| -Xms4096m | |
| -Xmx4096m | |
| ######################## | |
| # GENERAL JVM SETTINGS # | |
| ######################## | |
| # enable thread priorities, primarily so we can give periodic tasks | |
| # a lower priority to avoid interfering with client workload | |
| -XX:+UseThreadPriorities | |
| # allows lowering thread priority without being root on linux - probably | |
| # not necessary on Windows but doesn't harm anything. | |
| # see http://tech.stolsvik.com/2010/01/linux-java-thread-priorities-workar | |
| #-XX:ThreadPriorityPolicy=1 | |
| # Enable heap-dump if there's an OOM | |
| -XX:+HeapDumpOnOutOfMemoryError | |
| # Per-thread stack size. | |
| -Xss256k | |
| # Make sure all memory is faulted and zeroed on startup. | |
| # This helps prevent soft faults in containers and makes | |
| # transparent hugepage allocation more effective. | |
| -XX:+AlwaysPreTouch | |
| # Enable thread-local allocation blocks and allow the JVM to automatically | |
| # resize them at runtime. | |
| -XX:+UseTLAB | |
| -XX:+ResizeTLAB | |
| -XX:+UseNUMA | |
| #################### | |
| # GREMLIN SETTINGS # | |
| #################### | |
| -Dgremlin.io.kryoShimService=org.janusgraph.hadoop.serialize.JanusGraphKryoShimService | |
| ################# | |
| # GC SETTINGS # | |
| ################# | |
| -XX:+UseG1GC | |
| -XX:SurvivorRatio=8 | |
| -XX:MaxTenuringThreshold=1 | |