JVM Monitors hive Process

JVM Monitoring

Jvm:java Virtual machine (Java VM)

Monitoring tools:

The JDK comes with the following two examples, as well as other types of monitoring tools:

Jconsole.exe, Jvisualvm.exe (real-time monitoring of JDK's own)

Ibm:

IBM Pattern Modeling and Analysis Tool for Java garbage Collector (Ga441.jar)

IBM Heapanalyzer (Ha456.jar)

How to use: real-time Remote monitoring parameters:

Real-time monitoring tools Jconsole.exe, Jvisualvm.exe can be used for real-time monitoring of Java program processes, real-time information including the process of real-time CPU, memory (heap), threads and classes, if the program is located on the machine to open a port, Take this monitored hive process for example:

Node: 172.19.189.24

Monitoring Linux Port usage:

NETSTAT-TUNLP |grep 2990 There's nothing out there. Indicates that the port is not in use and can be used

Modify the hive JVM parameter to enable JMX remote connection:

-dcom.sun.management.jmxremote

-dcom.sun.management.jmxremote.port=2990

-dcom.sun.management.jmxremote.ssl=false-dcom.sun.management.jmxremote.authenticate=false

The above JVM parameters are configuration parameters that enable JMX remote connections.

GC-related parameters:

Information files used to generate the memory heap (which can be analyzed with two tools provided by IBM):

A few more parameters are added below to generate GC related files:

-verbose:gc

-xx:+printgcdetails

-xx:+printgcdatestamps-xloggc:/var/log/hive/gc.hiveserver2.log-' date+ '%y%m%d%h%m%s '-XX:+ Heapdumponoutofmemoryerror-xx:heapdumppath=/var/log/hive

-xx:+disableexplicitgc-xx:+usecompressedoops

After adding, restart the Hive service, Ps–ef|grep hive on 24 to see the details of the hive process, as shown in:

In the process information, you can see that these parameters have been added, at this point can be remotely connected to monitor:

JVISUALVM Operation Example:

Open Jvisualvm.exe (My directory is: C:\Program files\java\jdk1.7.0_25\bin)

Follow these steps:

Jconsole is used in the same way as JVISUALVM:

The interface after opening is as follows:

Examples of IBM analysis tools:

A few GC parameters will generate GC files, the contents of the JVM real-time garbage collection situation, in addition, when a memory overflow occurs when the memory heap dump file generated, the specific operation example and open after the situation is roughly as follows a few graphs:

Open (Ga441.jar, analyze Memory garbage collection):

When you select a file to open, you can see real-time changes in memory:

Open Ha456.jar, analyze the situation of the memory dump file, because of the relatively large, when opened to allocate more memory than the size of the file, as follows:

When you open, you can see the memory of OutOfMemory:

JVM Monitors hive Process