org.apache.giraph.utils

Class JMap

java.lang.Object

org.apache.giraph.utils.JMap

public class JMap
extends Object

Helper to run jmap and print the output

Field Summary

Fields

Modifier and Type	Field and Description
static String	ARGS Arguments to pass in to command

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JMap() Do not construct

Method Summary

Modifier and Type	Method and Description
static int	getProcessId() Get the process ID of the current running process
static void	heapHistogramDump(int numLines, boolean liveObjectsOnly, String jmapPath) Run jmap, print numLines of output from it to stderr.
static void	heapHistogramDump(int numLines, PrintStream printStream, String jmapPath) Run jmap, print numLines of output from it to stream passed in.
static void	heapHistogramDump(int numLines, String jmapPath) Run jmap, print numLines of output from it to stderr.

Methods inherited from class java.lang.Object

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

Field Detail

ARGS

public static final String ARGS

Arguments to pass in to command

See Also:

Constant Field Values

Constructor Detail

JMap

protected JMap()

Do not construct

Method Detail

getProcessId

public static int getProcessId()

Get the process ID of the current running process

Returns:

Integer process ID

heapHistogramDump

public static void heapHistogramDump(int numLines,
                                     boolean liveObjectsOnly,
                                     String jmapPath)

Run jmap, print numLines of output from it to stderr.

Parameters:

numLines - Number of lines to print

liveObjectsOnly - Should we only print non GC-able objects?

jmapPath - Path to jmap binary

heapHistogramDump

public static void heapHistogramDump(int numLines,
                                     String jmapPath)

Run jmap, print numLines of output from it to stderr.

Parameters:

numLines - Number of lines to print

jmapPath - Path to jmap binary

heapHistogramDump

public static void heapHistogramDump(int numLines,
                                     PrintStream printStream,
                                     String jmapPath)

Run jmap, print numLines of output from it to stream passed in.

Parameters:

numLines - Number of lines to print

printStream - Stream to print to

jmapPath - Path to jmap binary