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ambari-server/src/main/resources/stacks/HDP/2.5/services/stack_advisor.py (line 146) <https://reviews.apache.org/r/47497/#comment203472> 15GB is enormous, we need to scale back on smaller VMs. - Alejandro Fernandez On May 17, 2016, 10:34 p.m., Tom Beerbower wrote: > > ----------------------------------------------------------- > This is an automatically generated e-mail. To reply, visit: > https://reviews.apache.org/r/47497/ > ----------------------------------------------------------- > > (Updated May 17, 2016, 10:34 p.m.) > > > Review request for Ambari. > > > Bugs: AMBARI-16691 > https://issues.apache.org/jira/browse/AMBARI-16691 > > > Repository: ambari > > > Description > ------- > > In ATLAS-616, we uncovered problems with Atlas web service when testing > queries at scale. The investigation revealed a fix possible with tuning some > GC parameters. ATLAS-616 suggests the GC values in documentation. > > Default these settings in Ambari. > > The values we have recommended are all to be set in atlas-env.sh config file. > They are: > > Common for all JDKs: > > #export ATLAS_SERVER_OPTS="-server -XX:SoftRefLRUPolicyMSPerMB=0 > -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC > -XX:+CMSParallelRemarkEnabled -XX:+PrintTenuringDistribution > -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=dumps/atlas_server.hprof > -Xloggc:logs/gc-worker.log -verbose:gc -XX:+UseGCLogFileRotation > -XX:NumberOfGCLogFiles=10 -XX:GCLogFileSize=1m -XX:+PrintGCDetails > -XX:+PrintHeapAtGC -XX:+PrintGCTimeStamps" > > > For JDK7: > > #export ATLAS_SERVER_HEAP="-Xms15360m -Xmx15360m -XX:MaxNewSize=3072m > -XX:PermSize=100M -XX:MaxPermSize=512m" > > > For JDK8: > > #export ATLAS_SERVER_HEAP="-Xms15360m -Xmx15360m -XX:MaxNewSize=5120m > -XX:MetaspaceSize=100M -XX:MaxMetaspaceSize=512m" > > > Diffs > ----- > > > ambari-server/src/main/resources/common-services/ATLAS/0.1.0.2.3/package/scripts/params.py > b33a956 > > ambari-server/src/main/resources/stacks/HDP/2.5/services/ATLAS/configuration/atlas-env.xml > bae4de3 > ambari-server/src/main/resources/stacks/HDP/2.5/services/stack_advisor.py > 689e1fd > ambari-server/src/test/python/stacks/2.5/common/test_stack_advisor.py > cf82a9c > > Diff: https://reviews.apache.org/r/47497/diff/ > > > Testing > ------- > > manual test > > updated unit test > > mvn clean test > > > Thanks, > > Tom Beerbower > >
