com.bigdata.counters.linux

Class PIDStatCollector

java.lang.Object

com.bigdata.counters.AbstractProcessCollector

com.bigdata.counters.linux.PIDStatCollector

All Implemented Interfaces:

ICounterHierarchy, ICounterSetAccess, IProcessCounters, IStatisticsCollector

public class PIDStatCollector
extends AbstractProcessCollector
implements ICounterHierarchy, IProcessCounters

Collects statistics on the JVM process relating to CPU, memory, and IO statistics (when available) using pidstat -p 501 -u -I -r -d -w [[interval [count]]

Where -p is the pid to monitor, -u is cpu utilization (-I normalizes to 100% for SMP), -r gives the process memory statistics, -d gives IO statistics with kernels 2.6.20 and up; -w gives context switching data; The interval is in seconds. The count is optional - when missing or zero will repeat forever if interval was specified.

Author:

Bryan Thompson

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	PIDStatCollector.PIDStatReader Reads pidstat output and extracts and updates counter values.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	perProcessIOData set true if per-process IO data collection should be supported based on the KernelVersion.
protected int	pid process to be monitored.

Fields inherited from class com.bigdata.counters.AbstractProcessCollector

activeProcess, log

Fields inherited from interface com.bigdata.counters.IProcessCounters

CPU_PercentProcessorTime, CPU_PercentSystemTime, CPU_PercentUserTime, Memory_majorFaultsPerSec, Memory_minorFaultsPerSec, Memory_percentMemorySize, Memory_residentSetSize, Memory_runtimeFreeMemory, Memory_runtimeMaxMemory, Memory_runtimeTotalMemory, Memory_virtualSize, PhysicalDisk_BytesReadPerSec, PhysicalDisk_BytesWrittenPerSec

Fields inherited from interface com.bigdata.counters.ICounterHierarchy

CPU, Info, LogicalDisk, Memory, Memory_GarbageCollectors, Memory_Memory_Pools, PhysicalDisk, ps

Constructor Summary

Constructors

Constructor and Description
PIDStatCollector(int pid, int interval, KernelVersion kernelVersion)

Method Summary

Methods

Modifier and Type	Method and Description
List<String>	getCommand()
CounterSet	getCounters() Return performance counters.
AbstractProcessReader	getProcessReader()
protected void	setEnvironment(Map<String,String> env) Extended to force pidstat to use a consistent timestamp format regardless of locale by setting S_TIME_FORMAT="ISO" in the environment.

Methods inherited from class com.bigdata.counters.AbstractProcessCollector

getInterval, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

pid

protected final int pid

process to be monitored.

perProcessIOData

protected final boolean perProcessIOData

set true if per-process IO data collection should be supported based on the KernelVersion.

Constructor Detail

PIDStatCollector

public PIDStatCollector(int pid,
                int interval,
                KernelVersion kernelVersion)

Parameters:

pid - Process to be monitored.

interval - Reporting interval in seconds.

kernelVersion - The Linux KernelVersion.

Method Detail

getCommand

public List<String> getCommand()

Specified by:

getCommand in class AbstractProcessCollector

getCounters

public CounterSet getCounters()

Description copied from interface: ICounterSetAccess

Return performance counters.

Specified by:

getCounters in interface ICounterSetAccess

setEnvironment

protected void setEnvironment(Map<String,String> env)

Extended to force pidstat to use a consistent timestamp format regardless of locale by setting S_TIME_FORMAT="ISO" in the environment.

Overrides:

setEnvironment in class AbstractProcessCollector

getProcessReader

public AbstractProcessReader getProcessReader()

Specified by:

getProcessReader in class AbstractProcessCollector