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*
* http://www.apache.org/licenses/LICENSE-2.0
*
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package org.elasticsearch.index.engine;
import org.apache.lucene.util.BytesRefBuilder;
import org.apache.lucene.util.RamUsageTester;
import org.apache.lucene.util.TestUtil;
import org.elasticsearch.bootstrap.JavaVersion;
import org.elasticsearch.test.ESTestCase;
public class LiveVersionMapTests extends ESTestCase {
public void testRamBytesUsed() throws Exception {
assumeTrue("Test disabled for JDK 9", JavaVersion.current().compareTo(JavaVersion.parse("9")) < 0);
LiveVersionMap map = new LiveVersionMap();
for (int i = 0; i < 100000; ++i) {
BytesRefBuilder uid = new BytesRefBuilder();
uid.copyChars(TestUtil.randomSimpleString(random(), 10, 20));
VersionValue version = new VersionValue(randomLong(), randomLong(), randomLong());
map.putUnderLock(uid.toBytesRef(), version);
}
long actualRamBytesUsed = RamUsageTester.sizeOf(map);
long estimatedRamBytesUsed = map.ramBytesUsed();
// less than 50% off
assertEquals(actualRamBytesUsed, estimatedRamBytesUsed, actualRamBytesUsed / 2);
// now refresh
map.beforeRefresh();
map.afterRefresh(true);
for (int i = 0; i < 100000; ++i) {
BytesRefBuilder uid = new BytesRefBuilder();
uid.copyChars(TestUtil.randomSimpleString(random(), 10, 20));
VersionValue version = new VersionValue(randomLong(), randomLong(), randomLong());
map.putUnderLock(uid.toBytesRef(), version);
}
actualRamBytesUsed = RamUsageTester.sizeOf(map);
estimatedRamBytesUsed = map.ramBytesUsed();
// less than 25% off
assertEquals(actualRamBytesUsed, estimatedRamBytesUsed, actualRamBytesUsed / 4);
}
}