com.pivotal.gemfirexd.tools.sizer

Class GemFireXDInstrumentation

java.lang.Object

com.pivotal.gemfirexd.tools.sizer.GemFireXDInstrumentation

All Implemented Interfaces:

com.gemstone.gemfire.internal.size.SingleObjectSizer

public final class GemFireXDInstrumentation
extends Object
implements com.gemstone.gemfire.internal.size.SingleObjectSizer

Class that honors "-javaagent:.../lib/gemfirexd-tools.jar" It gets a handle to instrumentation agent for estimating object size in memory.
If any of the classes below is altered, please test it in following way as I am yet to find java agent instrumentation before starting VM in a DUnit, a hydra test will be required.

• GemFireXDInstrumentation
• ObjectSizer

Second mechanism of instrumenting after JVM is launched doesn't works correctly in current version 1.6

1. start locator
2. start server with -javaagent:.../lib/gemfirexd.jar
3. start ij
4. execute 'select * from sys.memoryanalytics"

Since:

1.6

Method Summary

Methods

Modifier and Type	Method and Description
static void	agentmain(String agentArgs, Instrumentation inst)
void	attachVirtualMachineAgent()
static GemFireXDInstrumentation	getInstance()
boolean	isAgentAttached()
static void	premain(String agentArgs, Instrumentation inst)
long	sizeof(Object objectToSize)

Methods inherited from class java.lang.Object

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

Method Detail

premain

public static void premain(String agentArgs,
           Instrumentation inst)

agentmain

public static void agentmain(String agentArgs,
             Instrumentation inst)

isAgentAttached

public boolean isAgentAttached()

Specified by:

isAgentAttached in interface com.gemstone.gemfire.internal.size.SingleObjectSizer

sizeof

public long sizeof(Object objectToSize)

Specified by:

sizeof in interface com.gemstone.gemfire.internal.size.SingleObjectSizer

attachVirtualMachineAgent

public void attachVirtualMachineAgent()

getInstance

public static GemFireXDInstrumentation getInstance()