• Forums
    • Public Forums
      • Community Connect
      • Dynatrace
        • Dynatrace Open Q&A
      • Application Monitoring & UEM
        • AppMon & UEM Open Q&A
      • Network Application Monitoring
        • NAM Open Q&A
  • Home
  • Public Forums
  • Application Monitoring & UEM
  • AppMon & UEM Open Q&A
avatar image
Question by Sandeep M. · Jun 04, 2013 at 04:44 PM ·

Garbage Collection

How does DT get the heap, thread, GC data, etc on AIX? I see GC times of 10 to 20 seconds slowing the system down. I want to figure out what to tune.

Thanks

Comment

People who like this

0 Show 0
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

2 Replies

  • Sort: 
  • Most voted
  • Newest
  • Oldest
avatar image

Answer by Sandeep M. · Jun 18, 2013 at 08:33 PM

I enable gc logging on our server and then compared it to the numbers in the host dashboard GC times. The GC Times shown by dynatrace was something like this..

It shows absolute GC times of 10 to 15 seconds.

However in the GC log between 2:00 and 2:15pm, the totalms has never gone over 1 second. How is it calculating those numbers?

<sys id="620" timestamp="Jun 12 14:00:13 2013" intervalms="60009.542">
<time exclusiveaccessms="0.173" />
<tenured freebytes="64877252" totalbytes="1073741824" percent="6" >
<soa freebytes="64877252" totalbytes="1073741824" percent="6" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:00:13 2013">
<stats sweepbytes="0" sweeptime="0.520" connectbytes="124518400" connecttime="0.285" />
</con>
<gc type="global" id="711" totalid="711" intervalms="60014.401">
<refs_cleared soft="3431" threshold="32" weak="2607" phantom="0" />
<finalization objectsqueued="2338" />
<timesms mark="317.688" sweep="0.985" compact="0.000" total="319.824" />
<tenured freebytes="550906432" totalbytes="1073741824" percent="51" >
<soa freebytes="550906432" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="550906432" totalbytes="1073741824" percent="51" >
<soa freebytes="550906432" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="327.482" />
</sys>

<sys id="621" timestamp="Jun 12 14:01:13 2013" intervalms="60051.469">
<time exclusiveaccessms="0.256" />
<tenured freebytes="68896568" totalbytes="1073741824" percent="6" >
<soa freebytes="68896568" totalbytes="1073741824" percent="6" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:01:13 2013">
<stats sweepbytes="0" sweeptime="0.510" connectbytes="133955584" connecttime="0.337" />
</con>
<gc type="global" id="712" totalid="712" intervalms="60064.290">
<refs_cleared soft="3102" threshold="32" weak="2752" phantom="0" />
<finalization objectsqueued="2297" />
<timesms mark="412.219" sweep="4.816" compact="0.000" total="418.945" />
<tenured freebytes="550495872" totalbytes="1073741824" percent="51" >
<soa freebytes="550495872" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="550495872" totalbytes="1073741824" percent="51" >
<soa freebytes="550495872" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="419.822" />
</sys>

<con event="completed sweep" timestamp="Jun 12 14:01:55 2013">
<stats bytes="0" time="0.005" />
</con>

<con event="kickoff" timestamp="Jun 12 14:01:55 2013">
<kickoff reason="Kickoff threshold reached" />
<stats tenurefreebytes="40317732" tracetarget="320490240" kickoff="40356192" tracerate="8.00" />
</con>

<con event="collection" id="69" timestamp="Jun 12 14:02:02 2013" intervalms="531581.702">
<time exclusiveaccessms="0.181" />
<tenured freebytes="3629644" totalbytes="1073741824" percent="0" >
<soa freebytes="3629644" totalbytes="1073741824" percent="0" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<stats tracetarget="320490240">
<traced total="292822152" mutators="22114076" helpers="270708076" percent="91" />
<cards cleaned="4053" kickoff="13452064" />
</stats>
<con event="completed full sweep" timestamp="Jun 12 14:02:02 2013">
<stats sweepbytes="0" sweeptime="0.169" connectbytes="7077888" connecttime="0.015" />
</con>
<con event="final card cleaning">
<stats cardscleaned="192" traced="1861108" durationms="7.539" />
</con>
<gc type="global" id="713" totalid="713" intervalms="48705.410">
<refs_cleared soft="5663" threshold="32" weak="2513" phantom="0" />
<finalization objectsqueued="2130" />
<timesms mark="99.849" sweep="1.021" compact="0.000" total="101.611" />
<tenured freebytes="549968896" totalbytes="1073741824" percent="51" >
<soa freebytes="549968896" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="549968896" totalbytes="1073741824" percent="51" >
<soa freebytes="549968896" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="121.839" />
</con>

<sys id="622" timestamp="Jun 12 14:03:03 2013" intervalms="108812.555">
<time exclusiveaccessms="0.131" />
<tenured freebytes="90043312" totalbytes="1073741824" percent="8" >
<soa freebytes="90043312" totalbytes="1073741824" percent="8" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:03:03 2013">
<stats sweepbytes="0" sweeptime="0.427" connectbytes="175636480" connecttime="1.057" />
</con>
<gc type="global" id="714" totalid="714" intervalms="60010.501">
<refs_cleared soft="3337" threshold="32" weak="2794" phantom="0" />
<finalization objectsqueued="2311" />
<timesms mark="317.018" sweep="1.135" compact="0.000" total="319.147" />
<tenured freebytes="549253568" totalbytes="1073741824" percent="51" >
<soa freebytes="549253568" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="549253568" totalbytes="1073741824" percent="51" >
<soa freebytes="549253568" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="319.625" />
</sys>

<sys id="623" timestamp="Jun 12 14:04:03 2013" intervalms="60005.155">
<time exclusiveaccessms="0.222" />
<tenured freebytes="124586568" totalbytes="1073741824" percent="11" >
<soa freebytes="124586568" totalbytes="1073741824" percent="11" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:04:03 2013">
<stats sweepbytes="0" sweeptime="0.415" connectbytes="143917056" connecttime="2.065" />
</con>
<gc type="global" id="715" totalid="715" intervalms="60011.958">
<refs_cleared soft="2710" threshold="32" weak="2694" phantom="0" />
<finalization objectsqueued="1985" />
<timesms mark="377.093" sweep="1.189" compact="0.000" total="379.849" />
<tenured freebytes="549245440" totalbytes="1073741824" percent="51" >
<soa freebytes="549245440" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="549245440" totalbytes="1073741824" percent="51" >
<soa freebytes="549245440" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="390.390" />
</sys>

<sys id="624" timestamp="Jun 12 14:05:03 2013" intervalms="60045.995">
<time exclusiveaccessms="41.490" />
<tenured freebytes="140477224" totalbytes="1073741824" percent="13" >
<soa freebytes="140477224" totalbytes="1073741824" percent="13" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:05:03 2013">
<stats sweepbytes="0" sweeptime="6.368" connectbytes="247201792" connecttime="1.353" />
</con>
<gc type="global" id="716" totalid="716" intervalms="60068.493">
<refs_cleared soft="2315" threshold="32" weak="2585" phantom="0" />
<finalization objectsqueued="1990" />
<timesms mark="624.967" sweep="1.095" compact="0.000" total="627.729" />
<tenured freebytes="549764352" totalbytes="1073741824" percent="51" >
<soa freebytes="549764352" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="549764352" totalbytes="1073741824" percent="51" >
<soa freebytes="549764352" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="670.384" />
</sys>

<sys id="625" timestamp="Jun 12 14:06:04 2013" intervalms="60003.794">
<time exclusiveaccessms="0.183" />
<tenured freebytes="123952248" totalbytes="1073741824" percent="11" >
<soa freebytes="123952248" totalbytes="1073741824" percent="11" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:06:04 2013">
<stats sweepbytes="0" sweeptime="0.431" connectbytes="241696768" connecttime="0.654" />
</con>
<gc type="global" id="717" totalid="717" intervalms="60009.550">
<refs_cleared soft="2867" threshold="32" weak="2163" phantom="0" />
<finalization objectsqueued="1997" />
<timesms mark="503.710" sweep="0.982" compact="0.000" total="505.913" />
<tenured freebytes="550053952" totalbytes="1073741824" percent="51" >
<soa freebytes="550053952" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="550053952" totalbytes="1073741824" percent="51" >
<soa freebytes="550053952" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="506.528" />
</sys>

<sys id="626" timestamp="Jun 12 14:07:04 2013" intervalms="60010.544">
<time exclusiveaccessms="0.215" />
<tenured freebytes="52535312" totalbytes="1073741824" percent="4" >
<soa freebytes="52535312" totalbytes="1073741824" percent="4" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:07:04 2013">
<stats sweepbytes="0" sweeptime="0.496" connectbytes="102498304" connecttime="0.352" />
</con>
<gc type="global" id="718" totalid="718" intervalms="60015.140">
<refs_cleared soft="4067" threshold="32" weak="3079" phantom="0" />
<finalization objectsqueued="2250" />
<timesms mark="291.754" sweep="0.970" compact="0.000" total="293.834" />
<tenured freebytes="550869632" totalbytes="1073741824" percent="51" >
<soa freebytes="550869632" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="550869632" totalbytes="1073741824" percent="51" >
<soa freebytes="550869632" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="301.423" />
</sys>

<sys id="627" timestamp="Jun 12 14:08:05 2013" intervalms="60002.955">
<time exclusiveaccessms="0.175" />
<tenured freebytes="171305608" totalbytes="1073741824" percent="15" >
<soa freebytes="171305608" totalbytes="1073741824" percent="15" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:08:05 2013">
<stats sweepbytes="0" sweeptime="0.405" connectbytes="333709312" connecttime="1.472" />
</con>
<gc type="global" id="719" totalid="719" intervalms="60015.252">
<refs_cleared soft="1922" threshold="32" weak="2143" phantom="0" />
<finalization objectsqueued="1907" />
<timesms mark="343.680" sweep="1.028" compact="0.000" total="345.915" />
<tenured freebytes="551179648" totalbytes="1073741824" percent="51" >
<soa freebytes="551179648" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="551179648" totalbytes="1073741824" percent="51" >
<soa freebytes="551179648" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="346.569" />
</sys>

<con event="completed sweep" timestamp="Jun 12 14:09:01 2013">
<stats bytes="0" time="0.003" />
</con>

<con event="kickoff" timestamp="Jun 12 14:09:01 2013">
<kickoff reason="Kickoff threshold reached" />
<stats tenurefreebytes="40258856" tracetarget="320566208" kickoff="40365688" tracerate="8.88" />
</con>

<sys id="628" timestamp="Jun 12 14:09:05 2013" intervalms="60009.325">
<time exclusiveaccessms="0.166" />
<tenured freebytes="10658544" totalbytes="1073741824" percent="0" >
<soa freebytes="10658544" totalbytes="1073741824" percent="0" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:09:05 2013">
<stats sweepbytes="0" sweeptime="0.474" connectbytes="20185088" connecttime="0.039" />
</con>
<con event="halted" mode="trace only" state="Card cleaning incomplete">
<stats tracetarget="320566208">
<traced total="285854584" mutators="26290396" helpers="259564188" percent="89" />
<cards cleaned="4053" kickoff="13455229" />
</stats>
</con>
<con event="complete marking">
<stats traced="56" timetakenms="0.155" />
</con>
<con event="final card cleaning">
<stats cardscleaned="9839" traced="2863852" durationms="13.027" />
</con>
<gc type="global" id="720" totalid="720" intervalms="60026.128">
<classloadersunloaded count="2" timetakenms="196.800" />
<refs_cleared soft="5484" threshold="32" weak="2754" phantom="0" />
<finalization objectsqueued="2304" />
<timesms mark="106.824" sweep="0.954" compact="0.000" total="305.451" />
<tenured freebytes="552247808" totalbytes="1073741824" percent="51" >
<soa freebytes="552247808" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="552247808" totalbytes="1073741824" percent="51" >
<soa freebytes="552247808" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="309.827" />
</sys>

<con event="completed sweep" timestamp="Jun 12 14:09:57 2013">
<stats bytes="0" time="0.005" />
</con>

<con event="kickoff" timestamp="Jun 12 14:09:57 2013">
<kickoff reason="Kickoff threshold reached" />
<stats tenurefreebytes="40346696" tracetarget="320566208" kickoff="40365688" tracerate="8.00" />
</con>

<con event="collection" id="70" timestamp="Jun 12 14:10:04 2013" intervalms="481463.802">
<time exclusiveaccessms="0.160" />
<tenured freebytes="3874448" totalbytes="1073741824" percent="0" >
<soa freebytes="3874448" totalbytes="1073741824" percent="0" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<stats tracetarget="320566208">
<traced total="292239408" mutators="24304200" helpers="267935208" percent="91" />
<cards cleaned="5046" kickoff="13455229" />
</stats>
<con event="completed full sweep" timestamp="Jun 12 14:10:04 2013">
<stats sweepbytes="0" sweeptime="0.206" connectbytes="6815744" connecttime="0.024" />
</con>
<con event="final card cleaning">
<stats cardscleaned="1443" traced="450184" durationms="1.664" />
</con>
<gc type="global" id="721" totalid="721" intervalms="58541.675">
<refs_cleared soft="5801" threshold="32" weak="2718" phantom="0" />
<finalization objectsqueued="2408" />
<timesms mark="74.755" sweep="1.058" compact="0.000" total="76.662" />
<tenured freebytes="552126912" totalbytes="1073741824" percent="51" >
<soa freebytes="552126912" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="552126912" totalbytes="1073741824" percent="51" >
<soa freebytes="552126912" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="88.331" />
</con>

<sys id="629" timestamp="Jun 12 14:11:04 2013" intervalms="118632.329">
<time exclusiveaccessms="0.161" />
<tenured freebytes="89098568" totalbytes="1073741824" percent="8" >
<soa freebytes="89098568" totalbytes="1073741824" percent="8" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:11:04 2013">
<stats sweepbytes="0" sweeptime="0.446" connectbytes="173015040" connecttime="1.729" />
</con>
<gc type="global" id="722" totalid="722" intervalms="60023.578">
<refs_cleared soft="3799" threshold="32" weak="2391" phantom="0" />
<finalization objectsqueued="2127" />
<timesms mark="364.969" sweep="1.220" compact="0.000" total="367.115" />
<tenured freebytes="551251584" totalbytes="1073741824" percent="51" >
<soa freebytes="551251584" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="551251584" totalbytes="1073741824" percent="51" >
<soa freebytes="551251584" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="367.910" />
</sys>

<sys id="630" timestamp="Jun 12 14:12:04 2013" intervalms="60006.328">
<time exclusiveaccessms="0.120" />
<tenured freebytes="69737704" totalbytes="1073741824" percent="6" >
<soa freebytes="69737704" totalbytes="1073741824" percent="6" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:12:04 2013">
<stats sweepbytes="0" sweeptime="0.421" connectbytes="135790592" connecttime="3.721" />
</con>
<gc type="global" id="723" totalid="723" intervalms="60026.304">
<refs_cleared soft="3669" threshold="32" weak="2442" phantom="0" />
<finalization objectsqueued="2137" />
<timesms mark="529.675" sweep="0.973" compact="0.000" total="531.730" />
<tenured freebytes="551667008" totalbytes="1073741824" percent="51" >
<soa freebytes="551667008" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="551667008" totalbytes="1073741824" percent="51" >
<soa freebytes="551667008" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="532.701" />
</sys>

<sys id="631" timestamp="Jun 12 14:13:05 2013" intervalms="60007.387">
<time exclusiveaccessms="0.218" />
<tenured freebytes="175525560" totalbytes="1073741824" percent="16" >
<soa freebytes="175525560" totalbytes="1073741824" percent="16" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:13:05 2013">
<stats sweepbytes="0" sweeptime="0.564" connectbytes="292552704" connecttime="1.513" />
</con>
<gc type="global" id="724" totalid="724" intervalms="60013.547">
<refs_cleared soft="1539" threshold="32" weak="1997" phantom="0" />
<finalization objectsqueued="1829" />
<timesms mark="295.659" sweep="0.864" compact="0.000" total="297.499" />
<tenured freebytes="552200384" totalbytes="1073741824" percent="51" >
<soa freebytes="552200384" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="552200384" totalbytes="1073741824" percent="51" >
<soa freebytes="552200384" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="298.060" />
</sys>

<sys id="632" timestamp="Jun 12 14:14:05 2013" intervalms="60005.877">
<time exclusiveaccessms="0.242" />
<tenured freebytes="166363712" totalbytes="1073741824" percent="15" >
<soa freebytes="166363712" totalbytes="1073741824" percent="15" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:14:05 2013">
<stats sweepbytes="0" sweeptime="0.491" connectbytes="298057728" connecttime="1.051" />
</con>
<gc type="global" id="725" totalid="725" intervalms="60011.670">
<refs_cleared soft="1774" threshold="32" weak="1938" phantom="0" />
<finalization objectsqueued="1787" />
<timesms mark="311.538" sweep="1.043" compact="0.000" total="314.126" />
<tenured freebytes="553075072" totalbytes="1073741824" percent="51" >
<soa freebytes="553075072" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="553075072" totalbytes="1073741824" percent="51" >
<soa freebytes="553075072" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="315.392" />
</sys>

<con event="completed sweep" timestamp="Jun 12 14:14:57 2013">
<stats bytes="0" time="0.003" />
</con>

<con event="kickoff" timestamp="Jun 12 14:14:57 2013">
<kickoff reason="Kickoff threshold reached" />
<stats tenurefreebytes="40314012" tracetarget="320623616" kickoff="40372864" tracerate="8.88" />
</con>

<sys id="633" timestamp="Jun 12 14:15:06 2013" intervalms="60010.759">
<time exclusiveaccessms="0.132" />
<tenured freebytes="4783480" totalbytes="1073741824" percent="0" >
<soa freebytes="4783480" totalbytes="1073741824" percent="0" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<con event="completed full sweep" timestamp="Jun 12 14:15:06 2013">
<stats sweepbytes="0" sweeptime="0.201" connectbytes="8650752" connecttime="0.022" />
</con>
<con event="halted" mode="clean trace" state="Card cleaning incomplete">
<stats tracetarget="320623616">
<traced total="287804080" mutators="27203352" helpers="260600728" percent="89" />
<cards cleaned="41" kickoff="13457621" />
</stats>
</con>
<con event="complete marking">
<stats traced="608" timetakenms="0.217" />
</con>
<con event="final card cleaning">
<stats cardscleaned="3890" traced="2929988" durationms="12.309" />
</con>
<gc type="global" id="726" totalid="726" intervalms="60027.570">
<refs_cleared soft="5645" threshold="32" weak="3643" phantom="0" />
<finalization objectsqueued="2180" />
<timesms mark="32.026" sweep="1.188" compact="0.000" total="34.186" />
<tenured freebytes="553812992" totalbytes="1073741824" percent="51" >
<soa freebytes="553812992" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
</gc>
<tenured freebytes="553812992" totalbytes="1073741824" percent="51" >
<soa freebytes="553812992" totalbytes="1073741824" percent="51" />
<loa freebytes="0" totalbytes="0" percent="0" />
</tenured>
<time totalms="34.732" />
</sys>

Comment

People who like this

0 Show 1 · Share
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

avatar image Roman S. · Jun 19, 2013 at 08:35 AM 0
Share

Hi Sandeep,

The chart you posted above shows one bar per 15 minutes, it is the sum of all GC activity in that timeframe not the average. So you'd have to add up the GC times between 2 and 2:15 to get to the roughly 15s we show in the chart.

Best, Roman

avatar image

Answer by Andreas G. · Jun 05, 2013 at 11:27 AM

Our Agent gets these timings either directly from the JVM or through JMX measures. You can look at the details of the Measure Definition to see which JMX measures we are actually collecting - or - you can also create new Measures in case the ones we deliver out-of-the-box are not sufficient

Tuning is a different topic - here I suggest you read our online java performance book. it has a chapter on Memory Management

Comment

People who like this

0 Show 0 · Share
10 |2000000 characters needed characters left characters exceeded
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 10 attachments (including images) can be used with a maximum of 50.0 MiB each and 250.0 MiB total.

How to get started

First steps in the forum
Read Community User Guide
Best practices of using forum

NAM 2019 SP5 is available


Check the RHEL support added in the latest NAM service pack.

Learn more

LIVE WEBINAR

"Performance Clinic - Monitoring as a Self Service with Dynatrace"


JANUARY 15, 3:00 PM GMT / 10:00 AM ET

Register here

Follow this Question

Answers Answers and Comments

3 People are following this question.

avatar image avatar image avatar image

Forum Tags

dotnet mobile monitoring load iis 6.5 kubernetes mainframe rest api dashboard framework 7.0 appmon 7 health monitoring adk log monitoring services auto-detection uem webserver test automation license web performance monitoring ios nam probe collector migration mq web services knowledge sharing reports window java hybris javascript appmon sensors good to know extensions search 6.3+ server documentation easytravel web dashboard kibana system profile purelytics docker splunk 6.1 process groups account 7.2 rest dynatrace saas spa guardian appmon administration production user actions postgresql upgrade oneagent measures security Dynatrace Managed transactionflow technologies diagnostics user session monitoring unique users continuous delivery sharing configuration alerting NGINX splitting business transaction client 6.3 installation database scheduler apache mobileapp RUM php dashlet azure purepath agent 7.1 appmonsaas messagebroker nodejs 6.2 android sensor performance warehouse
  • Forums
  • Public Forums
    • Community Connect
    • Dynatrace
      • Dynatrace Open Q&A
    • Application Monitoring & UEM
      • AppMon & UEM Open Q&A
    • Network Application Monitoring
      • NAM Open Q&A