Snippets
Created by
sreevastav gangarapu
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 | # 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_sizes()
{
case "`uname`" in
Linux)
system_memory_in_mb=`free -m | awk '/:/ {print $2;exit}'`
system_cpu_cores=`egrep -c 'processor([[:space:]]+):.*' /proc/cpuinfo`
;;
FreeBSD)
system_memory_in_bytes=`sysctl hw.physmem | awk '{print $2}'`
system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024`
system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'`
;;
SunOS)
system_memory_in_mb=`prtconf | awk '/Memory size:/ {print $3}'`
system_cpu_cores=`psrinfo | wc -l`
;;
Darwin)
system_memory_in_bytes=`sysctl hw.memsize | awk '{print $2}'`
system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024`
system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'`
;;
*)
# assume reasonable defaults for e.g. a modern desktop or
# cheap server
system_memory_in_mb="2048"
system_cpu_cores="2"
;;
esac
# some systems like the raspberry pi don't report cores, use at least 1
if [ "$system_cpu_cores" -lt "1" ]
then
system_cpu_cores="1"
fi
# set max heap size based on the following
# max(min(1/2 ram, 1024MB), min(1/4 ram, 8GB))
# calculate 1/2 ram and cap to 1024MB
# calculate 1/4 ram and cap to 8192MB
# pick the max
half_system_memory_in_mb=`expr $system_memory_in_mb / 2`
quarter_system_memory_in_mb=`expr $half_system_memory_in_mb / 2`
if [ "$half_system_memory_in_mb" -gt "1024" ]
then
half_system_memory_in_mb="1024"
fi
if [ "$quarter_system_memory_in_mb" -gt "8192" ]
then
quarter_system_memory_in_mb="8192"
fi
if [ "$half_system_memory_in_mb" -gt "$quarter_system_memory_in_mb" ]
then
max_heap_size_in_mb="$half_system_memory_in_mb"
else
max_heap_size_in_mb="$quarter_system_memory_in_mb"
fi
MAX_HEAP_SIZE="${max_heap_size_in_mb}M"
# Young gen: min(max_sensible_per_modern_cpu_core * num_cores, 1/4 * heap size)
max_sensible_yg_per_core_in_mb="100"
max_sensible_yg_in_mb=`expr $max_sensible_yg_per_core_in_mb "*" $system_cpu_cores`
desired_yg_in_mb=`expr $max_heap_size_in_mb / 4`
if [ "$desired_yg_in_mb" -gt "$max_sensible_yg_in_mb" ]
then
HEAP_NEWSIZE="${max_sensible_yg_in_mb}M"
else
HEAP_NEWSIZE="${desired_yg_in_mb}M"
fi
}
# Determine the sort of JVM we'll be running on.
java_ver_output=`"${JAVA:-java}" -version 2>&1`
jvmver=`echo "$java_ver_output" | grep '[openjdk|java] version' | awk -F'"' 'NR==1 {print $2}'`
JVM_VERSION=${jvmver%_*}
JVM_PATCH_VERSION=${jvmver#*_}
if [ "$JVM_VERSION" \< "1.8" ] ; then
echo "Cassandra 3.0 and later require Java 8u40 or later."
exit 1;
fi
if [ "$JVM_VERSION" \< "1.8" ] && [ "$JVM_PATCH_VERSION" \< "40" ] ; then
echo "Cassandra 3.0 and later require Java 8u40 or later."
exit 1;
fi
jvm=`echo "$java_ver_output" | grep -A 1 'java version' | awk 'NR==2 {print $1}'`
case "$jvm" in
OpenJDK)
JVM_VENDOR=OpenJDK
# this will be "64-Bit" or "32-Bit"
JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $2}'`
;;
"Java(TM)")
JVM_VENDOR=Oracle
# this will be "64-Bit" or "32-Bit"
JVM_ARCH=`echo "$java_ver_output" | awk 'NR==3 {print $3}'`
;;
*)
# Help fill in other JVM values
JVM_VENDOR=other
JVM_ARCH=unknown
;;
esac
# Override these to set the amount of memory to allocate to the JVM at
# start-up. For production use you may wish to adjust this for your
# environment. MAX_HEAP_SIZE is the total amount of memory dedicated
# to the Java heap. HEAP_NEWSIZE refers to the size of the young
# generation. Both MAX_HEAP_SIZE and HEAP_NEWSIZE should be either set
# or not (if you set one, set the other).
#
# The main trade-off for the young generation is that the larger it
# is, the longer GC pause times will be. The shorter it is, the more
# expensive GC will be (usually).
#
# The example HEAP_NEWSIZE assumes a modern 8-core+ machine for decent pause
# times. If in doubt, and if you do not particularly want to tweak, go with
# 100 MB per physical CPU core.
MAX_HEAP_SIZE="128M"
HEAP_NEWSIZE="32M"
# Set this to control the amount of arenas per-thread in glibc
#export MALLOC_ARENA_MAX=4
# only calculate the size if it's not set manually
if [ "x$MAX_HEAP_SIZE" = "x" ] && [ "x$HEAP_NEWSIZE" = "x" ]; then
calculate_heap_sizes
else
if [ "x$MAX_HEAP_SIZE" = "x" ] || [ "x$HEAP_NEWSIZE" = "x" ]; then
echo "please set or unset MAX_HEAP_SIZE and HEAP_NEWSIZE in pairs (see cassandra-env.sh)"
exit 1
fi
fi
if [ "x$MALLOC_ARENA_MAX" = "x" ] ; then
export MALLOC_ARENA_MAX=4
fi
#GC log path has to be defined here because it needs to access CASSANDRA_HOME
JVM_OPTS="$JVM_OPTS -Xloggc:${CASSANDRA_HOME}/logs/gc.log"
# Here we create the arguments that will get passed to the jvm when
# starting cassandra.
# Read user-defined JVM options from jvm.options file
JVM_OPTS_FILE=$CASSANDRA_CONF/jvm.options
for opt in `grep "^-" $JVM_OPTS_FILE`
do
JVM_OPTS="$JVM_OPTS $opt"
done
# Check what parameters were defined on jvm.options file to avoid conflicts
echo $JVM_OPTS | grep -q Xmn
DEFINED_XMN=$?
echo $JVM_OPTS | grep -q Xmx
DEFINED_XMX=$?
echo $JVM_OPTS | grep -q Xms
DEFINED_XMS=$?
echo $JVM_OPTS | grep -q UseConcMarkSweepGC
USING_CMS=$?
# We only set -Xms and -Xmx if they were not defined on jvm.options file
# If defined, both Xmx and Xms should be defined together.
if [ $DEFINED_XMX -ne 0 ] && [ $DEFINED_XMS -ne 0 ]; then
JVM_OPTS="$JVM_OPTS -Xms${MAX_HEAP_SIZE}"
JVM_OPTS="$JVM_OPTS -Xmx${MAX_HEAP_SIZE}"
elif [ $DEFINED_XMX -ne 0 ] || [ $DEFINED_XMS -ne 0 ]; then
echo "Please set or unset -Xmx and -Xms flags in pairs on jvm.options file."
exit 1
fi
# We only set -Xmn flag if it was not defined in jvm.options file
# and if the CMS GC is being used
# If defined, both Xmn and Xmx should be defined together.
if [ $DEFINED_XMN -eq 0 ] && [ $DEFINED_XMX -ne 0 ]; then
echo "Please set or unset -Xmx and -Xmn flags in pairs on jvm.options file."
exit 1
elif [ $DEFINED_XMN -ne 0 ] && [ $USING_CMS -eq 0 ]; then
JVM_OPTS="$JVM_OPTS -Xmn${HEAP_NEWSIZE}"
fi
if [ "$JVM_ARCH" = "64-Bit" ] && [ $USING_CMS -eq 0 ]; then
JVM_OPTS="$JVM_OPTS -XX:+UseCondCardMark"
fi
# enable assertions. disabling this in production will give a modest
# performance benefit (around 5%).
JVM_OPTS="$JVM_OPTS -ea"
# Per-thread stack size.
JVM_OPTS="$JVM_OPTS -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.
JVM_OPTS="$JVM_OPTS -XX:+AlwaysPreTouch"
# Biased locking does not benefit Cassandra.
JVM_OPTS="$JVM_OPTS -XX:-UseBiasedLocking"
# Larger interned string table, for gossip's benefit (CASSANDRA-6410)
JVM_OPTS="$JVM_OPTS -XX:StringTableSize=1000003"
# Enable thread-local allocation blocks and allow the JVM to automatically
# resize them at runtime.
JVM_OPTS="$JVM_OPTS -XX:+UseTLAB -XX:+ResizeTLAB"
# http://www.evanjones.ca/jvm-mmap-pause.html
JVM_OPTS="$JVM_OPTS -XX:+PerfDisableSharedMem"
# provides hints to the JIT compiler
JVM_OPTS="$JVM_OPTS -XX:CompileCommandFile=$CASSANDRA_CONF/hotspot_compiler"
# add the jamm javaagent
JVM_OPTS="$JVM_OPTS -javaagent:$CASSANDRA_HOME/lib/jamm-0.3.0.jar"
# enable thread priorities, primarily so we can give periodic tasks
# a lower priority to avoid interfering with client workload
JVM_OPTS="$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="$JVM_OPTS -XX:ThreadPriorityPolicy=42"
# set jvm HeapDumpPath with CASSANDRA_HEAPDUMP_DIR
JVM_OPTS="$JVM_OPTS -XX:+HeapDumpOnOutOfMemoryError"
if [ "x$CASSANDRA_HEAPDUMP_DIR" != "x" ]; then
JVM_OPTS="$JVM_OPTS -XX:HeapDumpPath=$CASSANDRA_HEAPDUMP_DIR/cassandra-`date +%s`-pid$$.hprof"
fi
# uncomment to have Cassandra JVM listen for remote debuggers/profilers on port 1414
# JVM_OPTS="$JVM_OPTS -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=1414"
# uncomment to have Cassandra JVM log internal method compilation (developers only)
# JVM_OPTS="$JVM_OPTS -XX:+UnlockDiagnosticVMOptions -XX:+LogCompilation"
# JVM_OPTS="$JVM_OPTS -XX:+UnlockCommercialFeatures -XX:+FlightRecorder"
# Prefer binding to IPv4 network intefaces (when net.ipv6.bindv6only=1). See
# http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6342561 (short version:
# comment out this entry to enable IPv6 support).
JVM_OPTS="$JVM_OPTS -Djava.net.preferIPv4Stack=true"
# jmx: metrics and administration interface
#
# add this if you're having trouble connecting:
# JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public name>"
#
# see
# https://blogs.oracle.com/jmxetc/entry/troubleshooting_connection_problems_in_jconsole
# for more on configuring JMX through firewalls, etc. (Short version:
# get it working with no firewall first.)
#
# Cassandra ships with JMX accessible *only* from localhost.
# To enable remote JMX connections, uncomment lines below
# with authentication and/or ssl enabled. See https://wiki.apache.org/cassandra/JmxSecurity
#
if [ "x$LOCAL_JMX" = "x" ]; then
LOCAL_JMX=yes
fi
# Specifies the default port over which Cassandra will be available for
# JMX connections.
# For security reasons, you should not expose this port to the internet. Firewall it if needed.
JMX_PORT="7299"
if [ "$LOCAL_JMX" = "yes" ]; then
JVM_OPTS="$JVM_OPTS -Dcassandra.jmx.local.port=$JMX_PORT -XX:+DisableExplicitGC"
else
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.rmi.port=$JMX_PORT"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl=false"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.authenticate=true"
JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.password.file=/etc/cassandra/jmxremote.password"
# JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStore=/path/to/keystore"
# JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.keyStorePassword=<keystore-password>"
# JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStore=/path/to/truststore"
# JVM_OPTS="$JVM_OPTS -Djavax.net.ssl.trustStorePassword=<truststore-password>"
# JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.need.client.auth=true"
# JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.registry.ssl=true"
# JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.protocols=<enabled-protocols>"
# JVM_OPTS="$JVM_OPTS -Dcom.sun.management.jmxremote.ssl.enabled.cipher.suites=<enabled-cipher-suites>"
fi
# To use mx4j, an HTML interface for JMX, add mx4j-tools.jar to the lib/
# directory.
# See http://wiki.apache.org/cassandra/Operations#Monitoring_with_MX4J
# By default mx4j listens on 0.0.0.0:8081. Uncomment the following lines
# to control its listen address and port.
#MX4J_ADDRESS="-Dmx4jaddress=127.0.0.1"
#MX4J_PORT="-Dmx4jport=8081"
# Cassandra uses SIGAR to capture OS metrics CASSANDRA-7838
# for SIGAR we have to set the java.library.path
# to the location of the native libraries.
JVM_OPTS="$JVM_OPTS -Djava.library.path=$CASSANDRA_HOME/lib/sigar-bin"
JVM_OPTS="$JVM_OPTS $MX4J_ADDRESS"
JVM_OPTS="$JVM_OPTS $MX4J_PORT"
JVM_OPTS="$JVM_OPTS $JVM_EXTRA_OPTS"
|
Comments (0)
You can clone a snippet to your computer for local editing. Learn more.