OK the findings are weird so far... Under constant query load on my local Docker, MEM% of the Fuseki container reached 100% within 45 minutes and it got OOMKilled.
However, the Used heap "teeth" in VisualVM were below 3GB of the total ~8GB Heap size the whole time. What does that tell us? On Thu, Sep 29, 2022 at 11:58 AM Martynas Jusevičius <marty...@atomgraph.com> wrote: > > Hi Eugen, > > I have the debugger working, I was trying to connect the profiler :) > Finally I managed to connect from VisualVM on Windows thanks to this > answer: > https://stackoverflow.com/questions/66222727/how-to-connect-to-jmx-server-running-inside-wsl2/71881475#71881475 > > I've launched an infinite curl loop to create some query load, but > what now? What should I be looking for in VisualVM? > > On Thu, Sep 29, 2022 at 11:33 AM Eugen Stan <eugen.s...@netdava.com> wrote: > > > > For debugging, you need to do the following: > > > > * pass JVM options to enable debugging > > * expose docker port for JVM debug you chose > > > > https://stackoverflow.com/questions/138511/what-are-java-command-line-options-to-set-to-allow-jvm-to-be-remotely-debugged > > > > You should be able to do all this without changing the image: docker env > > variables and docker port option. > > > > Once container is started and port is listening, open (confirm with > > docker ps) connect to it to debug. > > > > Good luck, > > > > On 29.09.2022 11:22, Martynas Jusevičius wrote: > > > On Thu, Sep 29, 2022 at 9:41 AM Lorenz Buehmann > > > <buehm...@informatik.uni-leipzig.de> wrote: > > >> > > >> You're working on an in-memory dataset? > > > > > > No the datasets are TDB2-backed > > > > > >> Does it also happen with Jena 4.6.1? > > > > > > Don't know :) > > > > > > I wanted to run a profiler and tried connecting from VisualVM on > > > Windows to the Fuseki container but neither jstatd nor JMX connections > > > worked... > > > Now I want to run VisualVM inside the container itself but this > > > requires changing the Docker image in a way that I haven't figured out > > > yet. > > > > > >> > > >> On 28.09.22 20:23, Martynas Jusevičius wrote: > > >>> Hi, > > >>> > > >>> We have a dockerized Fuseki 4.5.0 instance that is gradually running > > >>> out of memory over the course of a few hours. > > >>> > > >>> 3 datasets, none larger than 100000 triples. The load is negligible > > >>> (maybe a few bursts x 10 simple queries per minute), no updates. > > >>> > > >>> Dockerfile: > > >>> https://github.com/AtomGraph/fuseki-docker/blob/master/Dockerfile > > >>> Memory settings: > > >>> mem_limit: 10240m > > >>> JAVA_OPTIONS=-Xmx7700m -Xms7700m > > >>> > > >>> Any advice? > > >>> > > >>> Martynas > > > > -- > > Eugen Stan > > > > +40770 941 271 / https://www.netdava.com
