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PageCacheWarmupCcIT.java
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PageCacheWarmupCcIT.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicLong;
import org.neo4j.causalclustering.discovery.Cluster;
import org.neo4j.causalclustering.discovery.ClusterMember;
import org.neo4j.causalclustering.discovery.CoreClusterMember;
import org.neo4j.concurrent.BinaryLatch;
import org.neo4j.ext.udc.UdcSettings;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.configuration.Settings;
import org.neo4j.kernel.impl.pagecache.PageCacheWarmerMonitor;
import org.neo4j.kernel.monitoring.Monitors;
import org.neo4j.test.causalclustering.ClusterRule;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
public class PageCacheWarmupCcIT extends PageCacheWarmupTestSupport
{
@Rule
public ClusterRule clusterRule = new ClusterRule()
.withNumberOfReadReplicas( 0 )
.withSharedCoreParam( UdcSettings.udc_enabled, Settings.FALSE )
.withSharedCoreParam( GraphDatabaseSettings.pagecache_warmup_profiling_interval, "100ms" )
.withSharedReadReplicaParam( UdcSettings.udc_enabled, Settings.FALSE )
.withSharedReadReplicaParam( GraphDatabaseSettings.pagecache_warmup_profiling_interval, "100ms" );
private Cluster cluster;
@Before
public void setup() throws Exception
{
cluster = clusterRule.startCluster();
}
private long warmUpCluster() throws TimeoutException
{
CoreClusterMember leader = cluster.awaitLeader();
createTestData( leader.database() );
long pagesInMemory = waitForCacheProfile( leader.database() );
for ( CoreClusterMember member : cluster.coreMembers() )
{
waitForCacheProfile( member.database() );
}
return pagesInMemory;
}
private void verifyWarmupHappensAfterStoreCopy( ClusterMember member, long pagesInMemory )
{
AtomicLong pagesLoadedInWarmup = new AtomicLong();
BinaryLatch warmupLatch = new BinaryLatch();
Monitors monitors = member.monitors();
monitors.addMonitorListener( new PageCacheWarmerMonitor()
{
@Override
public void warmupCompleted( long elapsedMillis, long pagesLoaded )
{
pagesLoadedInWarmup.set( pagesInMemory );
warmupLatch.release();
}
@Override
public void profileCompleted( long elapsedMillis, long pagesInMemory )
{
}
} );
member.start();
warmupLatch.await();
assertThat( pagesLoadedInWarmup.get(), is( pagesInMemory ) );
}
@Test
public void cacheProfilesMustBeIncludedInStoreCopyToCore() throws Exception
{
long pagesInMemory = warmUpCluster();
ClusterMember member = cluster.addCoreMemberWithId( 4 );
verifyWarmupHappensAfterStoreCopy( member, pagesInMemory );
}
@Test
public void cacheProfilesMustBeIncludedInStoreCopyToReadReplica() throws Exception
{
long pagesInMemory = warmUpCluster();
ClusterMember member = cluster.addReadReplicaWithId( 4 );
verifyWarmupHappensAfterStoreCopy( member, pagesInMemory );
}
}