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Questions tagged [hprof]

A java heap/CPU profiling tool

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What's the meaning of `accum` field in hprof's result?

When I running java with option: -agentlib:hprof=cpu=times The hprof's result is like: CPU TIME (ms) BEGIN (total = 3093024) Thu Jan 28 14:57:36 2016 rank self accum count trace method 1 35.81% 35.81% 6 328434…
secfree
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Size of java heap dump files

My application server is generating .hprof files varying in different sizes from 2G to 3G. Why are heap dump files larger than the memory allocated through -Xmx. Shouldn't they equal to max heap size? which is when out of memory error happens.
chvs2000
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Retained size calculation including stack frame variables?

I've found a ton of questions on "retained size" and the accepted answer seems to be: The retained size for an object is the quantity of memory this objects preserves from garbage collection. Now, I've been working on programmatic computation of…
mabi
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Android heap dump convert to J2SE : hprof-conv: command not found

Following this guide from Patrick Dubroy, i try to convert my heap dump to J2SE HPROF, but can't execute an hprof-conv. And that's strange because it located in folder. How to fix this?
Sergey Shustikov
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Interpretation of java hprof histogram

The hprof, histogram shows the number of object by class. is this the total number of object that have ever been allocated during the life of the jvm ? or is this the number of object where are currently on the heap ? or is this the number of…
dmc
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Getting Hprof dump for other processes from application code

In my application , i have an option to capture the hprof dump. I used android.os.Debug.dumpHprofData (String fileName) Initially i though the hprof data generated by the method above is for the entire device , which is not so . The hprof data…
Natarajan
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Hadoop hprof output only has header

I am trying to profile a MapReduce job running on Azure HDInsight (HDP 2.2). All I really want is a profile of a single reduce task (though multiple would be better). Here are the configuration settings I'm currently…
Joe K
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How to use java heap profilers (HPROF)

With the basic knowledge of java 'hprof', I tried executing the below command as per oracle docs java -agentlib:hprof Hello.class But i get the below error instead of the profiling information Caused by: java.lang.ClassNotFoundException:…
Aarish Ramesh
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HPROF ERROR: Cannot allocate malloc memory

Running a java program using shell script but it terminates in mid of execution. Getting the below error- HPROF ERROR: Cannot allocate malloc memory [hprof_util.c:164] HPROF TERMINATED PROCESS Thanks for your help.
SagarVimal
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MAT HPROF: No space left on device

I'm running my app on my phone, while debugging with MAT. After I try to dump the HPROF file in Eclipse, I get the error: Failed to save hprof data into temp file. No space left on device. I've done a google search on this already...empty. I'm…
wizurd
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tomcat not generating hprof file on outofmemory error

I have some memory leak issue in my web app which is deployed in tomcat. To find the root cause I enabled the HeapDumpOnOutOfMemory error by setting: -XX:-HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/tomcat/logs and the memory settings…
gad
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Why my dumped hprof file show total heap only 9.6MB while the actually heap size is 75MB

I got a hprof file from the user who encounter a OutOfMemory exception. but when open that file with Eclipse Memory Analyzer, it show that total memory only 9.6MB far from the actual heap size 75MB. Is possible that profile process only dump part of…
Highth
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Hunting a memory leak with Eclipse and Mat, stuck converting the hprof file

This seems to be a question asked many times. I'm using Eclipse to write an Android app, in OS X. So far, no problem, except the app crashes sometimes, and I want to see whats going on so I can fix the problem. (Its probably related to bitmaps or…
Parker Sellers
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Get total memory allocated by a Java process (without profiler)?

Is there a JVM option to print out the total memory allocated during a run without running through an instrumented profiler? I'm certainly not an expert on how the memory allocator within Java works, but surely keeping track of total bytes allocated…
Karim
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HPROF complains when trying to find Maven build memory leak

I have a Maven build which appears to have a leak occasionally making the Java process run out of PermGen memory (EDIT) and I have learned from VisualVM that the heap and PermGen increases notably whenever a new is built. Now I would like to find…
Thorbjørn Ravn Andersen
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