after many configuration changes and optimizations, i think i've solved the heap problem.
here are the changes that i applied to the system; JVM changes -> https://medium.com/@hoan.nguyen.it/how-did-g1gc-tuning-flags-affect-our-back-end-web-app-c121d38dfe56 helped a lot nodes are running on 12CORE and 64GB MEM servers, i've added the following jvm parameters -XX:ParallelGCThreads=6 -XX:ConcGCThreads=2 -XX:MaxGCPauseMillis=200 -XX:InitiatingHeapOccupancyPercent=40 on ignite configuration i've changed all thread pool sizes, which were much more than these; <property name="systemThreadPoolSize" value="12"/> <property name="publicThreadPoolSize" value="12"/> <property name="queryThreadPoolSize" value="12"/> <property name="serviceThreadPoolSize" value="12"/> <property name="stripedPoolSize" value="12"/> <property name="dataStreamerThreadPoolSize" value="12"/> <property name="rebalanceThreadPoolSize" value="12"/> Here is the 16 hours of GC report; https://gceasy.io/diamondgc-report.jsp?p=c2hhcmVkLzIwMjEvMDkvMjkvLS1nYy5sb2cuMC5jdXJyZW50LS04LTU4LTMx&channel=WEB On 2021/09/27 17:11:21, Ilya Korol <llivezk...@gmail.com> wrote: > Actually Query interface doesn't define close() method, but QueryCursor > does. > In your snippets you're using try-with-resource construction for SELECT > queries which is good, but when you run MERGE INTO query you would also > get an QueryCursor as a result of > > igniteCacheService.getCache(ID, IgniteCacheType.LABEL).query(insertQuery); > > so maybe this QueryCursor objects still hold some resources/memory. > Javadoc for QueryCursor states that you should always close cursors. > > To simplify cursor closing there is a cursor.getAll() method that will > do this for you under the hood. > > > On 2021/09/13 06:17:21, Ibrahim Altun <i...@segmentify.com> wrote: > > Hi Ilya,> > > > > since this is production environment i could not risk to take heap > dump for now, but i will try to convince my superiors to get one and > analyze it.> > > > > Queries are heavily used in our system but aren't they autoclosable > objects? do we have to close them anyway?> > > > > here are some usage examples on our system;> > > --insert query is like this; MERGE INTO "ProductLabel" ("productId", > "label", "language") VALUES (?, ?, ?)> > > igniteCacheService.getCache(ID, > IgniteCacheType.LABEL).query(insertQuery);> > > > > another usage example;> > > --sqlFieldsQuery is like this; > > > String sql = "SELECT _val FROM \"UserRecord\" WHERE \"email\" IN (?)";> > > SqlFieldsQuery sqlFieldsQuery = new SqlFieldsQuery(sql);> > > sqlFieldsQuery.setLazy(true);> > > sqlFieldsQuery.setArgs(emails.toArray());> > > > > try (QueryCursor<List<?>> ignored = igniteCacheService.getCache(ID, > IgniteCacheType.USER).query(sqlFieldsQuery)) {...}> > > > > > > > > On 2021/09/12 20:28:09, Shishkov Ilya <sh...@gmail.com> wrote: > > > > Hi, Ibrahim!> > > > Have you analyzed the heap dump of the server node JVMs?> > > > In case your application executes queries are their cursors closed?> > > > > > > > пт, 10 сент. 2021 г. в 11:54, Ibrahim Altun <ib...@segmentify.com>:> > > > > > > > > Igniters any comment on this issue, we are facing huge GC > problems on> > > > > production environment, please advise.> > > > >> > > > > On 2021/09/07 14:11:09, Ibrahim Altun <ib...@segmentify.com>> > > > > wrote:> > > > > > Hi,> > > > > >> > > > > > totally 400 - 600K reads/writes/updates> > > > > > 12core> > > > > > 64GB RAM> > > > > > no iowait> > > > > > 10 nodes> > > > > >> > > > > > On 2021/09/07 12:51:28, Piotr Jagielski <pj...@touk.pl> wrote:> > > > > > > Hi,> > > > > > > Can you provide some information on how you use the cluster? > How many> > > > > reads/writes/updates per second? Also CPU / RAM spec of cluster > nodes?> > > > > > >> > > > > > > We observed full GC / CPU load / OOM killer when loading big > amount of> > > > > data (15 mln records, data streamer + allowOverwrite=true). We've > seen> > > > > 200-400k updates per sec on JMX metrics, but load up to 10 on > nodes, iowait> > > > > to 30%. Our cluster is 3 x 4CPU, 16GB RAM (already upgradingto > 8CPU, 32GB> > > > > RAM). Ignite 2.10> > > > > > >> > > > > > > Regards,> > > > > > > Piotr> > > > > > >> > > > > > > On 2021/09/02 08:36:07, Ibrahim Altun <ib...@segmentify.com>> > > > > wrote:> > > > > > > > After upgrading from 2.7.1 version to 2.10.0 version ignite > nodes> > > > > facing> > > > > > > > huge full GC operations after 24-36 hours after node start.> > > > > > > >> > > > > > > > We try to increase heap size but no luck, here is the start> > > > > configuration> > > > > > > > for nodes;> > > > > > > >> > > > > > > > JVM_OPTS="$JVM_OPTS -Xms12g -Xmx12g -server> > > > > > > >> > > > > > -javaagent:/etc/prometheus/jmx_prometheus_javaagent-0.14.0.jar=8090:/etc/prometheus/jmx.yml> > > > > > > > > > -Dcom.sun.management.jmxremote> > > > > > > > -Dcom.sun.management.jmxremote.authenticate=false> > > > > > > > -Dcom.sun.management.jmxremote.port=49165> > > > > > > > -Dcom.sun.management.jmxremote.host=localhost> > > > > > > > -XX:MaxMetaspaceSize=256m -XX:MaxDirectMemorySize=1g> > > > > > > > -DIGNITE_SKIP_CONFIGURATION_CONSISTENCY_CHECK=true> > > > > > > > -DIGNITE_WAL_MMAP=true > -DIGNITE_BPLUS_TREE_LOCK_RETRIES=100000> > > > > > > > -Djava.net.preferIPv4Stack=true"> > > > > > > >> > > > > > > > JVM_OPTS="$JVM_OPTS -XX:+AlwaysPreTouch -XX:+UseG1GC> > > > > > > > -XX:+ScavengeBeforeFullGC -XX:+DisableExplicitGC> > > > > > > > -XX:+UseStringDeduplication > -Xloggc:/var/log/apache-ignite/gc.log> > > > > > > > -XX:+PrintGCDetails -XX:+PrintGCDateStamps> > > > > > > > -XX:+PrintTenuringDistribution -XX:+PrintGCCause> > > > > > > > -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=10> > > > > > > > -XX:GCLogFileSize=100M"> > > > > > > >> > > > > > > > here is the 80 hours of GC analyize report:> > > > > > > >> > > > > > https://gceasy.io/my-gc-report.jsp?p=c2hhcmVkLzIwMjEvMDgvMzEvLS1nYy5sb2cuMC5jdXJyZW50LnppcC0tNS01MS0yOQ==&channel=WEB> > > > > > > > > >> > > > > > > > do we need more heap size or is there a BUG that we need to > be aware?> > > > > > > >> > > > > > > > here is the node configuration:> > > > > > > >> > > > > > > > <?xml version="1.0" encoding="UTF-8"?>> > > > > > > > <beans xmlns="http://www.springframework.org/schema/beans";> > > > > > > > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";> > > > > > > > xsi:schemaLocation="> > > > > > > > http://www.springframework.org/schema/beans> > > > > > > > > http://www.springframework.org/schema/beans/spring-beans.xsd";>> > > > > > > > <bean id="ignite.cfg"> > > > > > > > class="org.apache.ignite.configuration.IgniteConfiguration">> > > > > > > > <property name="gridLogger">> > > > > > > > <bean class="org.apache.ignite.logger.log4j2.Log4J2Logger">> > > > > > > > <constructor-arg type="java.lang.String"> > > > > > > > value="/etc/apache-ignite/ignite-log4j2.xml"/>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > > <property name="communicationSpi">> > > > > > > > <bean> > > > > > class="org.apache.ignite.spi.communication.tcp.TcpCommunicationSpi">> > > > > > > > <property name="usePairedConnections" value="true"/>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > > <property name="failureDetectionTimeout" value="60000"/>> > > > > > > > <property name="systemThreadPoolSize" value="128"/>> > > > > > > > <property name="publicThreadPoolSize" value="128"/>> > > > > > > > <property name="queryThreadPoolSize" value="128"/>> > > > > > > > <property name="serviceThreadPoolSize" value="128"/>> > > > > > > > <property name="stripedPoolSize" value="128"/>> > > > > > > > <property name="dataStreamerThreadPoolSize" value="4"/>> > > > > > > > <property name="rebalanceThreadPoolSize" value="16"/>> > > > > > > >> > > > > > > > <!-- Explicitly enable peer class loading. -->> > > > > > > > <property name="peerClassLoadingEnabled" value="true"/>> > > > > > > >> > > > > > > > <!-- Enable deploymentSpi,> > > > > > > > /usr/share/apache-ignite/libs/segmentify directory will be > checked> > > > > > > > every 5 seconds for changed files-->> > > > > > > > <property name="deploymentSpi">> > > > > > > > <bean> > > > > class="org.apache.ignite.spi.deployment.uri.UriDeploymentSpi">> > > > > > > > <property name="temporaryDirectoryPath"> > > > > > > > value="/tmp/temp_ignite_libs"/>> > > > > > > > <property name="uriList">> > > > > > > > <list>> > > > > > > >> > > > > > > > <value>file://freq=5000@localhost> > > > > /usr/share/apache-ignite/libs/segmentify/</value>> > > > > > > > </list>> > > > > > > > </property>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > >> > > > > > > > <property name="cacheConfiguration">> > > > > > > > <list>> > > > > > > > <!-- Partitioned cache example configuration (Atomic> > > > > mode). -->> > > > > > > > <bean> > > > > class="org.apache.ignite.configuration.CacheConfiguration">> > > > > > > > <property name="name" value="default"/>> > > > > > > > <property name="atomicityMode" value="ATOMIC"/>> > > > > > > > <property name="backups" value="1"/>> > > > > > > > </bean>> > > > > > > > </list>> > > > > > > > </property>> > > > > > > >> > > > > > > > <!-- Explicitly configure TCP discovery SPI to provide list > of> > > > > > > > initial nodes. -->> > > > > > > > <property name="discoverySpi">> > > > > > > > <bean> > > > > class="org.apache.ignite.spi.discovery.tcp.TcpDiscoverySpi">> > > > > > > > <property name="networkTimeout" value="60000"/>> > > > > > > > <property name="ipFinder">> > > > > > > > <bean> > > > > > > >> > > > > > class="org.apache.ignite.spi.discovery.tcp.ipfinder.vm.TcpDiscoveryVmIpFinder">> > > > > > > > > > <property name="addresses">> > > > > > > > <list>> > > > > > > > <!-- THERE ARE 10 NODES -->> > > > > > > > </list>> > > > > > > > </property>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > >> > > > > > > > <!-- Enabling Apache Ignite native persistence. -->> > > > > > > > <property name="dataStorageConfiguration">> > > > > > > > <bean> > > > > class="org.apache.ignite.configuration.DataStorageConfiguration">> > > > > > > > <property name="defaultDataRegionConfiguration">> > > > > > > > <bean> > > > > > > > > class="org.apache.ignite.configuration.DataRegionConfiguration">> > > > > > > > <property name="persistenceEnabled"> > > > > value="true"/>> > > > > > > > <property name="checkpointPageBufferSize"> > > > > > > > value="#{ 2L * 1024 * 1024 * 1024}"/>> > > > > > > > <property name="maxSize" value="#{ 40L * 1024 *> > > > > > > > 1024 * 1024 }"/>> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > > <property name="storagePath"> > > > > value="/srv/ignite/persist"/>> > > > > > > > <property name="walPath" value="/srv/ignite/wal"/>> > > > > > > > <property name="walArchivePath" value="/srv/ignite/wal"/>> > > > > > > > <property name="walMode" value="LOG_ONLY"/>> > > > > > > > <property name="walSegmentSize" value="#{ 256L * 1024 *> > > > > 1024 }"/>> > > > > > > > <property name="walFlushFrequency" value="5000"/>> > > > > > > > <property name="maxWalArchiveSize" value="#{ 512L * 1024> > > > > * 1024 }"/>> > > > > > > > <property name="writeThrottlingEnabled" value="true"/>> > > > > > > > <property name="checkpointFrequency" value="300000"/>> > > > > > > > <property name="checkpointWriteOrder" value="SEQUENTIAL"> > > > > />> > > > > > > > </bean>> > > > > > > > </property>> > > > > > > > </bean>> > > > > > > >> > > > > > > >> > > > > > > > --> > > > > > > > <https://www.segmentify.com/>İbrahim Halil AltunSenior > Software> > > > > Engineer+90> > > > > > > > 536 3327510 • segmentify.com → > <https://www.segmentify.com/>UK •> > > > > Germany •> > > > > > > > Turkey <https://www.segmentify.com/ecommerce-growth-show>> > > > > > > > <https://www.g2.com/products/segmentify/reviews>> > > > > > > >> > > > > > >> > > > > >> > > > >> > > > > > > >
