com.netflix.priam.tuner

Class JVMOptionsTuner

java.lang.Object

com.netflix.priam.tuner.JVMOptionsTuner

public class JVMOptionsTuner
extends java.lang.Object

This is to tune the jvm.options file introduced in Cassandra 3.x to pass JVM parameters to Cassandra. It supports configuring GC type (CMS/G1GC) where it automatically activates default properties as provided in jvm.options file. Note that this will not "add" any GC options.

Created by aagrawal on 8/23/17.

Field Summary

Fields

Modifier and Type	Field and Description
protected IConfiguration	config

Constructor Summary

Constructors

Constructor and Description
JVMOptionsTuner(IConfiguration config)

Method Summary

Modifier and Type	Method and Description
static java.util.Map<java.lang.String,JVMOption>	parseJVMOptions(java.lang.String property) Util function to parse comma separated list of jvm options to a Map (jvmOptionName, JVMOption).
void	updateAndSaveJVMOptions(java.lang.String outputFile) Update the JVM options file and save to a file for cassandra by updating/removing JVM options IConfiguration.getJVMExcludeSet() and IConfiguration.getJVMUpsertSet(), configuring GC IConfiguration.getGCType()etc.
protected java.util.List<java.lang.String>	updateJVMOptions() Update the JVM options file for cassandra by updating/removing JVM options IConfiguration.getJVMExcludeSet() and IConfiguration.getJVMUpsertSet(), configuring GC IConfiguration.getGCType()etc.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

config

protected final IConfiguration config

Constructor Detail

JVMOptionsTuner

@Inject
public JVMOptionsTuner(IConfiguration config)

Method Detail

updateAndSaveJVMOptions

public void updateAndSaveJVMOptions(java.lang.String outputFile)
                             throws java.lang.Exception

Update the JVM options file and save to a file for cassandra by updating/removing JVM options IConfiguration.getJVMExcludeSet() and IConfiguration.getJVMUpsertSet(), configuring GC IConfiguration.getGCType()etc.

Parameters:

outputFile - File name with which this configured JVM options should be written.

Throws:

java.lang.Exception - when encountered with invalid configured GC type. IConfiguration.getGCType()

updateJVMOptions

protected java.util.List<java.lang.String> updateJVMOptions()
                                                     throws java.lang.Exception

Update the JVM options file for cassandra by updating/removing JVM options IConfiguration.getJVMExcludeSet() and IConfiguration.getJVMUpsertSet(), configuring GC IConfiguration.getGCType()etc.

Returns:

List of Configuration as String after reading the configuration from jvm.options

Throws:

java.lang.Exception - when encountered with invalid configured GC type. IConfiguration.getGCType()

parseJVMOptions

public static final java.util.Map<java.lang.String,JVMOption> parseJVMOptions(java.lang.String property)

Util function to parse comma separated list of jvm options to a Map (jvmOptionName, JVMOption). It will ignore anything which is not a valid JVM option.

Parameters:

property - comma separated list of JVM options.

Returns:

Map of (jvmOptionName, JVMOption).