Java JVM调优指南：高性能与并发优化

###########################################################################
#                             jvm.options                                 #
#                                                                         #
# - all flags defined here will be used by cassandra to startup the JVM   #
# - one flag should be specified per line                                 #
# - lines that do not start with '-' will be ignored                      #
# - only static flags are accepted (no variables or parameters)           #
# - dynamic flags will be appended to these on cassandra-env              #
###########################################################################

######################
# STARTUP PARAMETERS #
######################

# Uncomment any of the following properties to enable specific startup parameters

# In a multi-instance deployment, multiple Cassandra instances will independently assume that all
# CPU processors are available to it. This setting allows you to specify a smaller set of processors
# and perhaps have affinity.
#-Dcassandra.available_processors=number_of_processors

# The directory location of the cassandra.yaml file.
#-Dcassandra.config=directory

# Sets the initial partitioner token for a node the first time the node is started.
#-Dcassandra.initial_token=token

# Set to false to start Cassandra on a node but not have the node join the cluster.
#-Dcassandra.join_ring=true|false

# Set to false to clear all gossip state for the node on restart. Use when you have changed node
# information in cassandra.yaml (such as listen_address).
#-Dcassandra.load_ring_state=true|false

# Enable pluggable metrics reporter. See Pluggable metrics reporting in Cassandra 2.0.2.
#-Dcassandra.metricsReporterConfigFile=file

# Set the port on which the CQL native transport listens for clients. (Default: 9042)
#-Dcassandra.native_transport_port=port

# Overrides the partitioner. (Default: org.apache.cassandra.dht.Murmur3Partitioner)
#-Dcassandra.partitioner=partitioner

# To replace a node that has died, restart a new node in its place specifying the address of the
# dead node. The new node must not have any data in its data directory, that is, it must be in the
# same state as before bootstrapping.
#-Dcassandra.replace_address=listen_address or broadcast_address of dead node

# Allow restoring specific tables from an archived commit log.
#-Dcassandra.replayList=table

# Allows overriding of the default RING_DELAY (1000ms), which is the amount of time a node waits
# before joining the ring.
#-Dcassandra.ring_delay_ms=ms

# Set the SSL port for encrypted communication. (Default: 7001)
#-Dcassandra.ssl_storage_port=port

# Set the port for inter-node communication. (Default: 7000)
#-Dcassandra.storage_port=port