com.bigdata.counters.linux
Class PIDStatCollector

java.lang.Object
  com.bigdata.counters.AbstractProcessCollector
      com.bigdata.counters.linux.PIDStatCollector

All Implemented Interfaces:

ICounterHierarchy, 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 montitor -u is cpi (-I normalizes to 100% for SMP), -r is memory stats, -d gives IO statistics with kernels 2.6.20 and up; -w is context switching data; The interval is in seconds. The count is optional - when missing or zero will repeat forever if interval was specified.

Version:

$Id: PIDStatCollector.java 2265 2009-10-26 12:51:06Z thompsonbry $

Author:

Bryan Thompson

Nested Class Summary

protected class

PIDStatCollector.PIDStatReader Reads pidstat output and extracts and updates counter values.

Field Summary

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, PhysicalDisk, ps

Constructor Summary

PIDStatCollector(int pid, int interval, KernelVersion kernelVersion)

Method Summary

List<String>	getCommand()
CounterSet	getCounters() Declare the counters that we will collect using pidstat.
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.

TODO:

kernelVersion could be static.

Method Detail

getCommand

public List<String> getCommand()

Specified by:

getCommand in class AbstractProcessCollector

getCounters

public CounterSet getCounters()

Declare the counters that we will collect using pidstat. These counters are NOT placed within the counter hierarchy but are declared using the bare path for the counter. E.g., as IProcessCounters.Memory_virtualSize.

Specified by:

getCounters in interface IStatisticsCollector

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