Examples with DefaultPageCacheTracer org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer used on opensource projects

Example 46 with DefaultPageCacheTracer

use of org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer in project neo4j by neo4j.

the class CountsComputerTest method tracePageCacheAccessOnInitialization.

@Test
void tracePageCacheAccessOnInitialization() throws IOException {
    DatabaseManagementService managementService = dbBuilder.build();
    try {
        GraphDatabaseAPI db = (GraphDatabaseAPI) managementService.database(DEFAULT_DATABASE_NAME);
        var countsStore = db.getDependencyResolver().resolveDependency(GBPTreeCountsStore.class);
        var pageCacheTracer = new DefaultPageCacheTracer();
        var cursorContext = new CursorContext(pageCacheTracer.createPageCursorTracer("tracePageCacheAccessOnInitialization"));
        countsStore.start(cursorContext, INSTANCE);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        softly.assertThat(cursorTracer.pins()).as("Pins").isEqualTo(1);
        softly.assertThat(cursorTracer.unpins()).as("Unpins").isEqualTo(1);
        softly.assertThat(cursorTracer.hits()).as("hits").isEqualTo(1);
    } finally {
        managementService.shutdown();
    }
}

Example 47 with DefaultPageCacheTracer

use of org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer in project neo4j by neo4j.

the class CsvImporterTest method tracePageCacheAccessOnCsvImport.

@Test
void tracePageCacheAccessOnCsvImport() throws IOException {
    Path logDir = testDir.directory("logs");
    Path reportLocation = testDir.file("the_report");
    Path inputFile = testDir.file("foobar.csv");
    List<String> lines = List.of("foo;bar;baz");
    Files.write(inputFile, lines, Charset.defaultCharset());
    Config config = Config.defaults(GraphDatabaseSettings.logs_directory, logDir.toAbsolutePath());
    var cacheTracer = new DefaultPageCacheTracer();
    CsvImporter csvImporter = CsvImporter.builder().withDatabaseLayout(databaseLayout).withDatabaseConfig(config).withReportFile(reportLocation.toAbsolutePath()).withFileSystem(testDir.getFileSystem()).withPageCacheTracer(cacheTracer).addNodeFiles(emptySet(), new Path[] { inputFile.toAbsolutePath() }).build();
    csvImporter.doImport();
    long pins = cacheTracer.pins();
    assertThat(pins).isGreaterThan(0);
    assertThat(cacheTracer.unpins()).isEqualTo(pins);
    assertThat(cacheTracer.hits()).isGreaterThan(0).isLessThanOrEqualTo(pins);
    assertThat(cacheTracer.faults()).isGreaterThan(0).isLessThanOrEqualTo(pins);
}

Example 48 with DefaultPageCacheTracer

use of org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer in project neo4j by neo4j.

the class EncodeGroupsStepTest method tracePageCacheAccessOnEncode.

@Test
void tracePageCacheAccessOnEncode() throws Exception {
    when(store.nextId(any(CursorContext.class))).thenAnswer(invocation -> {
        CursorContext cursorContext = invocation.getArgument(0);
        var event = cursorContext.getCursorTracer().beginPin(false, 1, null);
        event.hit();
        event.done();
        return 1L;
    });
    var cacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAccessOnEncode"));
    Configuration config = Configuration.withBatchSize(Configuration.DEFAULT, 10);
    try (EncodeGroupsStep encoder = new EncodeGroupsStep(control, config, store, PageCacheTracer.NULL)) {
        encoder.start(Step.ORDER_SEND_DOWNSTREAM);
        Catcher catcher = new Catcher();
        encoder.process(batch(new Group(1, 3), new Group(2, 3), new Group(3, 4)), catcher, cursorContext);
        encoder.endOfUpstream();
        encoder.awaitCompleted();
    }
    assertThat(cursorContext.getCursorTracer().pins()).isEqualTo(10);
    assertThat(cursorContext.getCursorTracer().hits()).isEqualTo(10);
    assertThat(cursorContext.getCursorTracer().unpins()).isEqualTo(10);
}

Example 49 with DefaultPageCacheTracer

use of org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer in project neo4j by neo4j.

the class NodeImporterTest method tracePageCacheAccessOnNodeImport.

@Test
void tracePageCacheAccessOnNodeImport() throws IOException {
    JobScheduler scheduler = new ThreadPoolJobScheduler();
    try (Lifespan life = new Lifespan(scheduler);
        BatchingNeoStores stores = BatchingNeoStores.batchingNeoStoresWithExternalPageCache(fs, pageCache, NULL, layout, Standard.LATEST_RECORD_FORMATS, Configuration.DEFAULT, NullLogService.getInstance(), AdditionalInitialIds.EMPTY, Config.defaults(), INSTANCE)) {
        stores.createNew();
        int numberOfLabels = 50;
        long nodeId = 0;
        var cacheTracer = new DefaultPageCacheTracer();
        try (NodeImporter importer = new NodeImporter(stores, IdMappers.actual(), new DataImporter.Monitor(), cacheTracer, INSTANCE)) {
            importer.id(nodeId);
            String[] labels = new String[numberOfLabels];
            for (int i = 0; i < labels.length; i++) {
                labels[i] = "Label" + i;
            }
            importer.labels(labels);
            importer.property("a", randomAscii(10));
            importer.property("b", randomAscii(100));
            importer.property("c", randomAscii(1000));
            importer.endOfEntity();
        }
        NodeStore nodeStore = stores.getNodeStore();
        NodeRecord record = nodeStore.getRecord(nodeId, nodeStore.newRecord(), RecordLoad.NORMAL, CursorContext.NULL);
        long[] labels = NodeLabelsField.parseLabelsField(record).get(nodeStore, CursorContext.NULL);
        assertEquals(numberOfLabels, labels.length);
        assertThat(cacheTracer.faults()).isEqualTo(2);
        assertThat(cacheTracer.pins()).isEqualTo(13);
        assertThat(cacheTracer.unpins()).isEqualTo(13);
        assertThat(cacheTracer.hits()).isEqualTo(11);
    }
}

Example 50 with DefaultPageCacheTracer

use of org.neo4j.io.pagecache.tracing.DefaultPageCacheTracer in project neo4j by neo4j.

the class MuninnPageCacheStressIT method shouldHandleTheStressOfManyManyEvictions.

@Test
void shouldHandleTheStressOfManyManyEvictions() throws Exception {
    DefaultPageCacheTracer monitor = new DefaultPageCacheTracer();
    Condition condition = numberOfEvictions(monitor, 100_000);
    PageCacheStressTest runner = new PageCacheStressTest.Builder().withWorkingDirectory(testDirectory.homePath()).with(monitor).with(condition).build();
    runner.run();
}