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Questions tagged [jstat]

A JavaScript statistical library. Also a Java Virtual Machine Statistics Monitoring Tool.

jStat is a JavaScript statistical library. jstat is also a Java Virtual Machine Statistics Monitoring Tool.

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NMT Class committed vs Jstat Compressed Class Space

I'm investigating the OutOfMemoryError: Compressed Class Space issue. I think, that I found my root cause and solution for it (JAXBContext.newInstance() called by Hibernate Validator method: buildValidatorFactory after every submitted action by…
Krzysiek Rysz
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Definition of GCT (Total garbage collection time)

The "Total garbage collection time" can be determined by observing the GCT column printed by the command: jstat -gc as described by the documentation here: https://docs.oracle.com/en/java/javase/12/tools/jstat.html It appears to be an amount…
Andrew Parks
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analysis of a java process "not responding"?

My java process stopped responding. I tried to jstack but failed with below error. 21039: Unable to open socket file: target process not responding or HotSpot VM not loaded The -F option can be used when the target process is not responding Then I…
Matthew Zhang
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jstat: command not found

I am working with Solaris 10 10/09 s10s_u8wos_08a SPARC. When trying to use jstat utility, I am receiving the following prompts: stires-web-a:/aaa/thirdParty/java/jdk1.8.0_101/bin->ls js* jsadebugd jstack jstat jstatd…
dushkin
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Why do S0C and S1C fields keep changing in the output of jstat?

Here is an output of jstat: jstat -gc 7285 1s 125 S0C S1C S0U S1U EC EU OC OU ... 22016.0 9216.0 0.0 9120.0 156160.0 153482.7 125952.0 31227.0 ... 13312.0 20992.0 9472.0 0.0 151040.0 …
user2250246
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SuperImpose normal distribution on plot with jStat Javascript

I'm trying to superimpose a normal distribution on some data. I have binned and plotted the data, and I want to generate a normal distribution for comparison. I'm using jStat for this. So far I have been able to generate the normal distribution, but…
Martin Nyaga
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How to find what is using physical memory in a Java process

I have a Java program which has Xms and Xmx set as 2GB and 8GB respectively. The top shows the process is using VIRT of 27GB and RSS of 14GB. Questions: 1. How did this process consume double the physical memory than Xmx? 2. visualvm shows…
cppcoder
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collecting JVM GC samples within a specific time range

I am trying to fetch the JVM GC stats using 'jstat' gcutil command. jstat -gcutil -t 32351 This is returning me a single sample from current time. I also understand using $ jstat -gcutil -t 32351 1s 5 will return me 5 samples with 1s interval from…
mo0206
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What does the -J option mean in jstat?

I'm learning some JVM tools like jstat, jmap, jtack, etc. When I type jstat in the commandline, it responds with the following messages: Usage: jmap [option] (to connect to running process) jmap [option] …
Eric Fan
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JSTAT in Unix Script Not Working Properly

When writing a unix script, I am very confused why the script is erroring out. The script is this... jvmpid=$(pidof java) ./jstat -gc $jvmpid When I run the script, it errors out: Malformed VM Identifier: 3492 Usage: jstat -help|-options …
BobcatBlitz
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Why jstat doesn't work after java update on linux?

After updating Java 1.7.0.71 to 1.7.0_75, jstat doesn't work anymore. I've tried to stop the application, delete /tmp/hsperfdata_* and restart the application, but /tmp/hsperfdata_* doesn't exist and jstat failed. /opt/jdk/bin/jstat -gc myApp 1959…
Taiskorgon
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Trying to instal jStat - do I need GNU or GSL

I am developing a Ruby-on_rails application that now needs to do some statistical processing. I wish to use jStat. On this page it lists three dependencies including GNU make 3.8 or later. Tried the download and install and it failed. Should I…
user1854802
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Calculating the inverse of the beta cumulative probability density in JavaScript

I need to duplicate the functionality of this EXCEL function in JavaScript - the inverse of the beta cumulative probability density http://office.microsoft.com/en-gb/excel-help/beta-inv-function-HP010335670.aspx. Is there a JS library which offers…
Curtains
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High Perm Generation and Low Old Generation

We have actually increase the memory for the jvm to 256M and now the old generation looks very small but the Perm Generation is quite high nearly 80%. Sample data capture via jstat is as below. What does a high perm generation indicate…
new14
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Creating Log-normal distribution curves with Jstat using json data

There is no documentation for jStat. As of 2012-11-06 (per the documentation page): "The jStat API documentation is still being compiled." I want to plot log-normal curves with JSON data. Can anyone who have worked on this throw some light on how…
user1803361
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