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Add statistics about searchers

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This commit is contained in:
Andrea Cavalli 2022-06-13 23:25:43 +02:00
parent 9db32dacae
commit cc6071a4de
2 changed files with 47 additions and 1 deletions
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7
src/main/java/it/cavallium/dbengine/database/disk/CachedIndexSearcherManager.java
View File

@ -205,4 +205,11 @@ public class CachedIndexSearcherManager implements IndexSearcherManager {
return closeMono;
}
public long getActiveSearchers() {
return activeSearchers.get();
}
public long getActiveRefreshes() {
return activeRefreshes.get();
}
}

41
src/main/java/it/cavallium/dbengine/database/disk/LLLocalLuceneIndex.java
View File

@ -12,6 +12,7 @@ import static reactor.core.scheduler.Schedulers.DEFAULT_BOUNDED_ELASTIC_SIZE;
import com.google.common.collect.Multimap;
import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Tag;
import io.micrometer.core.instrument.Timer;
import io.netty5.buffer.api.Send;
import it.cavallium.dbengine.client.query.QueryParser;
@ -201,6 +202,7 @@ public class LLLocalLuceneIndex implements LLLuceneIndex {
}
logger.trace("WriterSchedulerMaxThreadCount: {}", writerSchedulerMaxThreadCount);
indexWriterConfig.setMergeScheduler(mergeScheduler);
indexWriterConfig.setMergePolicy(new TieredMergePolicy());
if (luceneOptions.indexWriterRAMBufferSizeMB().isPresent()) {
indexWriterConfig.setRAMBufferSizeMB(luceneOptions.indexWriterRAMBufferSizeMB().get());
}
@ -213,7 +215,7 @@ public class LLLocalLuceneIndex implements LLLuceneIndex {
indexWriterConfig.setSimilarity(getLuceneSimilarity());
this.indexWriter = new IndexWriter(directory, indexWriterConfig);
this.snapshotsManager = new SnapshotsManager(indexWriter, snapshotter);
this.searcherManager = new CachedIndexSearcherManager(indexWriter,
var searcherManager = new CachedIndexSearcherManager(indexWriter,
snapshotsManager,
luceneHeavyTasksScheduler,
getLuceneSimilarity(),
@ -221,6 +223,7 @@ public class LLLocalLuceneIndex implements LLLuceneIndex {
luceneOptions.writeAllDeletes().orElse(false),
luceneOptions.queryRefreshDebounceTime()
);
this.searcherManager = searcherManager;
this.startedDocIndexings = meterRegistry.counter("index.write.doc.started.counter", "index.name", clusterName);
this.endeddDocIndexings = meterRegistry.counter("index.write.doc.ended.counter", "index.name", clusterName);
@ -230,6 +233,42 @@ public class LLLocalLuceneIndex implements LLLuceneIndex {
this.commitTime = Timer.builder("index.write.commit.timer").publishPercentiles(0.2, 0.5, 0.95).publishPercentileHistogram().tag("index.name", clusterName).register(meterRegistry);
this.mergeTime = Timer.builder("index.write.merge.timer").publishPercentiles(0.2, 0.5, 0.95).publishPercentileHistogram().tag("index.name", clusterName).register(meterRegistry);
this.refreshTime = Timer.builder("index.search.refresh.timer").publishPercentiles(0.2, 0.5, 0.95).publishPercentileHistogram().tag("index.name", clusterName).register(meterRegistry);
meterRegistry.gauge("index.snapshot.counter", List.of(Tag.of("index.name", clusterName)), snapshotter, SnapshotDeletionPolicy::getSnapshotCount);
meterRegistry.gauge("index.write.flushing.bytes", List.of(Tag.of("index.name", clusterName)), indexWriter, IndexWriter::getFlushingBytes);
meterRegistry.gauge("index.write.sequence.completed.max", List.of(Tag.of("index.name", clusterName)), indexWriter, IndexWriter::getMaxCompletedSequenceNumber);
meterRegistry.gauge("index.write.doc.pending.counter", List.of(Tag.of("index.name", clusterName)), indexWriter, IndexWriter::getPendingNumDocs);
meterRegistry.gauge("index.write.segment.merging.counter", List.of(Tag.of("index.name", clusterName)), indexWriter, iw -> iw.getMergingSegments().size());
meterRegistry.gauge("index.directory.deletion.pending.counter", List.of(Tag.of("index.name", clusterName)), indexWriter, iw -> {
try {
return iw.getDirectory().getPendingDeletions().size();
} catch (IOException | NullPointerException e) {
return 0;
}
});
meterRegistry.gauge("index.doc.counter", List.of(Tag.of("index.name", clusterName)), indexWriter, iw -> {
try {
return iw.getDocStats().numDocs;
} catch (NullPointerException e) {
return 0;
}
});
meterRegistry.gauge("index.doc.max", List.of(Tag.of("index.name", clusterName)), indexWriter, iw -> {
try {
return iw.getDocStats().maxDoc;
} catch (NullPointerException e) {
return 0;
}
});
meterRegistry.gauge("index.searcher.refreshes.active.count",
List.of(Tag.of("index.name", clusterName)),
searcherManager,
CachedIndexSearcherManager::getActiveRefreshes
);
meterRegistry.gauge("index.searcher.searchers.active.count",
List.of(Tag.of("index.name", clusterName)),
searcherManager,
CachedIndexSearcherManager::getActiveSearchers
);
// Start scheduled tasks
var commitMillis = luceneOptions.commitDebounceTime().toMillis();