Mailing-List: contact dev-help@jmeter.apache.org; run by ezmlm
Precedence: bulk
Reply-To: dev@jmeter.apache.org
MIME-Version: 1.0
In-Reply-To: <46b93252-914c-a069-0829-1ddf681d3ad1@kippdata.de>
References: <20170116212721.982FB3A00A3@svn01-us-west.apache.org> <46b93252-914c-a069-0829-1ddf681d3ad1@kippdata.de>
From: Philippe Mouawad <philippe.mouawad@gmail.com>
Date: Tue, 17 Jan 2017 20:34:55 +0100
Message-ID: <CAH9fUpaatyaYbc1MVWXiOHEBgSWK6U-VmdE5C6KpkvSG+gY1gQ@mail.gmail.com>
Subject: Re: svn commit: r1779108 - in /jmeter/trunk: bin/jmeter
 bin/jmeter.bat xdocs/changes.xml
To: "dev@jmeter.apache.org" <dev@jmeter.apache.org>
Content-Type: multipart/alternative; boundary=94eb2c1239ea17a99805464f65bb
archived-at: Tue, 17 Jan 2017 19:35:09 -0000

--94eb2c1239ea17a99805464f65bb
Content-Type: text/plain; charset=UTF-8

Hello Rainer,
Nice to see you back among us and Happy new year !

Good catch , thanks
Regards

On Tue, Jan 17, 2017 at 7:08 PM, Rainer Jung <rainer.jung@kippdata.de>
wrote:

> Hi there,
>
>
> Am 16.01.2017 um 22:27 schrieb pmouawad@apache.org:
>
>> Author: pmouawad
>> Date: Mon Jan 16 21:27:21 2017
>> New Revision: 1779108
>>
>> URL: http://svn.apache.org/viewvc?rev=1779108&view=rev
>> Log:
>> Bug 60593 - Switch to G1 GC algorithm
>> Bugzilla Id: 60593
>>
>> Modified:
>>     jmeter/trunk/bin/jmeter
>>     jmeter/trunk/bin/jmeter.bat
>>     jmeter/trunk/xdocs/changes.xml
>>
>> Modified: jmeter/trunk/bin/jmeter
>> URL: http://svn.apache.org/viewvc/jmeter/trunk/bin/jmeter?rev=177
>> 9108&r1=1779107&r2=1779108&view=diff
>> ============================================================
>> ==================
>> --- jmeter/trunk/bin/jmeter (original)
>> +++ jmeter/trunk/bin/jmeter Mon Jan 16 21:27:21 2017
>> @@ -67,10 +67,7 @@ done
>>
>>  PRGDIR=`dirname "$PRG"`
>>
>> -# The following should be reasonably good values for most tests running
>> -# on Sun JVMs. Following is the analysis on which it is based. If it's
>> total
>> -# gibberish to you, please study my article at
>> -# http://www.atg.com/portal/myatg/developer?paf_dm=full&paf_
>> gear_id=1100010&detailArticle=true&id=9606
>> +#
>>  # Original page has disappeared, it is now only available at:
>>  # https://web.archive.org/web/20060614151434/http://www.atg.co
>> m/portal/myatg/developer?paf_dm=full&paf_gear_id=1100010&
>> detailArticle=true&id=9606
>>  #
>> @@ -90,36 +87,18 @@ PRGDIR=`dirname "$PRG"`
>>  # system's memory availability:
>>  HEAP="-Xms512m -Xmx512m"
>>
>> -# There's an awful lot of per-sample objects allocated during test run,
>> so we
>> -# need a large eden to avoid too frequent scavenges -- you'll need to
>> tune this
>> -# down proportionally if you modify the HEAP values above, below example
>> is fine for 512m of Heap:
>> -# NEW="-XX:NewSize=128m -XX:MaxNewSize=128m"
>> -
>> -# This ratio and target have been proven OK in tests with a specially
>> high
>> -# amount of per-sample objects (the HtmlParserHTMLParser tests):
>> -# SURVIVOR="-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50"
>> -
>> -# Think about it: trying to keep per-run objects in tenuring definitely
>> -# represents a cost, but where's the benefit? They won't disappear before
>> -# the test is over, and at that point we will no longer care about
>> performance.
>> -#
>> -# So we will have JMeter do an explicit Full GC before starting a test
>> run,
>> -# but then we won't make any effort (or spend any CPU) to keep objects
>> -# in tenuring longer than the life of per-sample objects -- which is
>> hopefully
>> -# shorter than the period between two scavenges):
>> -#
>> -TENURING="-XX:MaxTenuringThreshold=2"
>> -
>> -CLASS_UNLOAD="-XX:+CMSClassUnloadingEnabled"
>> +#VERBOSE_GC="-verbose:gc -Xloggc:gc_jmeter_%p.log -XX:+PrintGCDetails
>> -XX:+PrintGCCause -XX:+PrintTenuringDistribution -XX:+PrintHeapAtGC
>> -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime
>> -XX:+PrintGCDateStamps"
>>
>>  # Finally, some tracing to help in case things go astray:
>> -#DEBUG="-verbose:gc -XX:+PrintTenuringDistribution"
>> +GC_ALGO="-XX:+UseG1GC -XX:MaxGCPauseMillis=250 -XX:G1ReservePercent=20"
>> +
>> +CLASS_UNLOAD="-XX:+CMSClassUnloadingEnabled"
>>
>
> I think CMS class unloading doesn't make sense in combination with G1. CMS
> (concurrent Mark Sweep) is an alternative collector which can be used
> instead of G1. IMHO we should drop this variable ...
>
>  # Always dump on OOM (does not cost anything unless triggered)
>>  DUMP="-XX:+HeapDumpOnOutOfMemoryError"
>>
>>  SERVER="-server"
>>
>> -ARGS="$SERVER $DUMP $HEAP $NEW $SURVIVOR $TENURING $PERM $CLASS_UNLOAD"
>> +ARGS="$SERVER $DUMP $HEAP $CLASS_UNLOAD $VERBOSE_GC $GC_ALGO"
>>
>
> ... and remove it from ARGS
>
>
>  java $ARGS $JVM_ARGS $JMETER_OPTS -jar "$PRGDIR/ApacheJMeter.jar" "$@"
>>
>> Modified: jmeter/trunk/bin/jmeter.bat
>> URL: http://svn.apache.org/viewvc/jmeter/trunk/bin/jmeter.bat?rev
>> =1779108&r1=1779107&r2=1779108&view=diff
>> ============================================================
>> ==================
>> --- jmeter/trunk/bin/jmeter.bat (original)
>> +++ jmeter/trunk/bin/jmeter.bat Mon Jan 16 21:27:21 2017
>> @@ -71,31 +71,24 @@ rem On NT/2K grab all arguments at once
>>  set JMETER_CMD_LINE_ARGS=%*
>>
>>  rem The following link describes the -XX options:
>> -rem http://www.oracle.com/technetwork/java/javase/tech/vmoptions
>> -jsp-140102.html
>> -rem http://java.sun.com/developer/TechTips/2000/tt1222.html has some
>> more descriptions
>> -rem Unfortunately TechTips no longer seem to be available, except via:
>> -rem https://web.archive.org/web/20090614101951/http://java.sun.
>> com/developer/TechTips/2000/tt1222.html
>> +rem http://docs.oracle.com/javase/8/docs/technotes/tools/unix/java.html
>>
>>  rem See the unix startup file for the rationale of the following
>> parameters,
>>  rem including some tuning recommendations
>>  set HEAP=-Xms512m -Xmx512m
>> -set NEW=-XX:NewSize=128m -XX:MaxNewSize=128m
>> -set SURVIVOR=-XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=50%
>> -set TENURING=-XX:MaxTenuringThreshold=2
>> -rem Java 8 remove Permanent generation, don't settings the PermSize
>> -if %current_minor% LEQ "8" (
>> -    rem Increase MaxPermSize if you use a lot of Javascript in your Test
>> Plan :
>> -    set PERM=-XX:PermSize=64m -XX:MaxPermSize=128m
>> -)
>> +
>> +#Uncomment this to generate GC verbose file
>> +rem set VERBOSE_GC=-verbose:gc -Xloggc:gc_jmeter_%p.log
>> -XX:+PrintGCDetails -XX:+PrintGCCause -XX:+PrintTenuringDistribution
>> -XX:+PrintHeapAtGC -XX:+PrintGCApplicationConcurrentTime
>> -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCDateStamps
>> +
>> +set GC_ALGO=-XX:+UseG1GC -XX:MaxGCPauseMillis=250 -XX:G1ReservePercent=20
>>
>>  set CLASS_UNLOAD=-XX:+CMSClassUnloadingEnabled
>>
>
> Same here ...
>
> -rem set DEBUG=-verbose:gc -XX:+PrintTenuringDistribution
>>
>>  rem Always dump on OOM (does not cost anything unless triggered)
>>  set DUMP=-XX:+HeapDumpOnOutOfMemoryError
>>
>>  rem Additional settings that might help improve GUI performance on some
>> platforms
>> -rem See: http://java.sun.com/products/java-media/2D/perf_graphics.html
>> +rem See: http://www.oracle.com/technetwork/java/perf-graphics-135933.
>> html
>>
>>  set DDRAW=
>>  rem  Setting this flag to true turns off DirectDraw usage, which
>> sometimes helps to get rid of a lot of rendering problems on Win32.
>> @@ -109,7 +102,7 @@ rem set DDRAW=%DDRAW% -Dsun.java2d.ddsca
>>
>>  rem Server mode
>>  rem Collect the settings defined above
>> -set ARGS=%DUMP% %HEAP% %NEW% %SURVIVOR% %TENURING% %PERM% %CLASS_UNLOAD%
>> %DDRAW%
>> +set ARGS=%DUMP% %HEAP% %CLASS_UNLOAD% %VERBOSE_GC% %GC_ALGO% %DDRAW%
>>
>
> ... and here
>
>  %JM_START% %JM_LAUNCH% %ARGS% %JVM_ARGS% -jar
>> "%JMETER_BIN%ApacheJMeter.jar" %JMETER_CMD_LINE_ARGS%
>>
>>
>> Modified: jmeter/trunk/xdocs/changes.xml
>> URL: http://svn.apache.org/viewvc/jmeter/trunk/xdocs/changes.xml?
>> rev=1779108&r1=1779107&r2=1779108&view=diff
>> ============================================================
>> ==================
>> --- jmeter/trunk/xdocs/changes.xml [utf-8] (original)
>> +++ jmeter/trunk/xdocs/changes.xml [utf-8] Mon Jan 16 21:27:21 2017
>> @@ -153,6 +153,7 @@ JMeter now requires Java 8. Ensure you u
>>      <li><bug>54525</bug>Search Feature : Enhance it with ability to
>> replace</li>
>>      <li><bug>60530</bug>Add API to create JMeter threads while test is
>> running. Based on a contribution by Logan Mauzaize (logan.mauzaize at
>> gmail.com) and Maxime Chassagneux (maxime.chassagneux at gmail.com).</li>
>>      <li><bug>60514</bug>Ability to apply a naming convention on Children
>> of a Transaction Controller. Contributed by Ubik Load Pack (support at
>> ubikloadpack.com)</li>
>> +    <li><bug>60593</bug>Switch to G1 GC algorithm</li>
>>  </ul>
>>
>>  <ch_section>Non-functional changes</ch_section>
>>
>
> Regards,
>
> Rainer
>
>


-- 
Cordialement.
Philippe Mouawad.

--94eb2c1239ea17a99805464f65bb--