first commit for new repo

Change-Id: I307341ad768d38a60fb49f96b5b40186c0bd1205
Signed-off-by: Michael Lando <ml636r@att.com>

1 files changed, 124 insertions, 0 deletions

diff --git a/config/cassandra/cassandra-env.sh b/config/cassandra/cassandra-env.sh
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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+calculate_heap_size()
+{
+    case "`uname`" in
+        Linux)
+            system_memory_in_mb=`free -m | awk '/Mem:/ {print $2}'`
+            MAX_HEAP_SIZE=$((system_memory_in_mb / 2))M
+            return 0
+        ;;
+        FreeBSD)
+            system_memory_in_bytes=`sysctl hw.physmem | awk '{print $2}'`
+            MAX_HEAP_SIZE=$((system_memory_in_bytes / 1024 / 1024 / 2))M
+            return 0
+        ;;
+        *)
+            MAX_HEAP_SIZE=1024M
+            return 1
+        ;;
+    esac
+}
+
+# The amount of memory to allocate to the JVM at startup, you almost
+# certainly want to adjust this for your environment. If left commented
+# out, the heap size will be automatically determined by calculate_heap_size
+# MAX_HEAP_SIZE="4G"
+
+if [ "x$MAX_HEAP_SIZE" = "x" ]; then
+    calculate_heap_size
+fi
+
+# Specifies the default port over which Cassandra will be available for
+# JMX connections.
+JMX_PORT="9090"
+
+# To use mx4j, an HTML interface for JMX, add mx4j-tools.jar to the lib/ directory.
+# By default mx4j listens on 0.0.0.0:8081. Uncomment the following lines to control
+# its listen address and port.
+#MX4J_ADDRESS="-Dmx4jaddress=0.0.0.0"
+#MX4J_PORT="-Dmx4jport=8081"
+
+
+# Here we create the arguments that will get passed to the jvm when
+# starting cassandra.
+
+# enable assertions.  disabling this in production will give a modest
+# performance benefit (around 5%).
+#JVM_OPTS="$JVM_OPTS -ea"
+
+# enable thread priorities, primarily so we can give periodic tasks
+# a lower priority to avoid interfering with client workload
+JVM_OPTS="$JVM_OPTS -XX:+UseThreadPriorities"
+# allows lowering thread priority without being root.  see
+# http://tech.stolsvik.com/2010/01/linux-java-thread-priorities-workaround.html
+JVM_OPTS="$JVM_OPTS -XX:ThreadPriorityPolicy=42"
+
+# min and max heap sizes should be set to the same value to avoid
+# stop-the-world GC pauses during resize, and so that we can lock the
+# heap in memory on startup to prevent any of it from being swapped
+# out.
+JVM_OPTS="$JVM_OPTS -Xms$MAX_HEAP_SIZE"
+JVM_OPTS="$JVM_OPTS -Xmx$MAX_HEAP_SIZE"
+JVM_OPTS="$JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError" 
+
+if [ "`uname`" = "Linux" ] ; then
+    # reduce the per-thread stack size to minimize the impact of Thrift
+    # thread-per-client.  (Best practice is for client connections to
+    # be pooled anyway.) Only do so on Linux where it is known to be
+    # supported.
+    JVM_OPTS="$JVM_OPTS -Xss256k"
+fi
+
+# GC tuning options
+JVM_OPTS="$JVM_OPTS -XX:+UseParNewGC" 
+JVM_OPTS="$JVM_OPTS -XX:+UseConcMarkSweepGC" 
+JVM_OPTS="$JVM_OPTS -XX:+CMSParallelRemarkEnabled" 
+JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=8" 
+JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=1"
+JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75"
+JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly"
+
+# GC logging options -- uncomment to enable
+# JVM_OPTS="$JVM_OPTS -XX:+PrintGCDetails"
+# JVM_OPTS="$JVM_OPTS -XX:+PrintGCTimeStamps"
+# JVM_OPTS="$JVM_OPTS -XX:+PrintClassHistogram"
+# JVM_OPTS="$JVM_OPTS -XX:+PrintTenuringDistribution"
+# JVM_OPTS="$JVM_OPTS -XX:+PrintGCApplicationStoppedTime"
+# JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc.log"
+
+# Prefer binding to IPv4 network intefaces (when net.ipv6.bindv6only=1). See 
+# http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561 (short version:
+# comment out this entry to enable IPv6 support).
+JVM_OPTS="$JVM_OPTS -Djava.net.preferIPv4Stack=true"
+
+# jmx: metrics and administration interface
+# 
+# add this if you're having trouble connecting:
+# JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public name>"
+# 
+# see 
+# http://blogs.sun.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole
+# for more on configuring JMX through firewalls, etc. (Short version:
+# get it working with no firewall first.)
+
+# Disable JMX so multiple cassandras can run on 127.0.0.1, .2, .3, etc.
+#JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT" 
+#JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false" 
+#JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=false" 
+#JVM_OPTS="$JVM_OPTS $MX4J_ADDRESS" 
+#JVM_OPTS="$JVM_OPTS $MX4J_PORT"