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

Example 6 with PageCursorTracer

use of org.neo4j.io.pagecache.tracing.cursor.PageCursorTracer in project neo4j by neo4j.

the class NeoStoresIT method tracePageCacheAccessOnGetRawRecordData.

@Test
void tracePageCacheAccessOnGetRawRecordData() throws IOException {
    var storageEngine = db.getDependencyResolver().resolveDependency(RecordStorageEngine.class);
    var neoStores = storageEngine.testAccessNeoStores();
    var propertyStore = neoStores.getPropertyStore();
    try (Transaction transaction = db.beginTx()) {
        var node = transaction.createNode();
        node.setProperty("a", "b");
        transaction.commit();
    }
    var cursorContext = new CursorContext(new DefaultPageCacheTracer().createPageCursorTracer("tracePageCacheAccessOnGetRawRecordData"));
    propertyStore.getRawRecordData(1L, cursorContext);
    PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
    assertEquals(1, cursorTracer.hits());
    assertEquals(1, cursorTracer.pins());
    assertEquals(1, cursorTracer.unpins());
}

Example 7 with PageCursorTracer

use of org.neo4j.io.pagecache.tracing.cursor.PageCursorTracer in project neo4j by neo4j.

the class FullScanNonUniqueIndexSamplerTest method tracePageCacheAccessOnSampling.

@Test
void tracePageCacheAccessOnSampling() throws IOException {
    Value[] values = generateNumberValues();
    buildTree(values);
    var pageCacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(pageCacheTracer.createPageCursorTracer("testTracer"));
    assertZeroCursor(cursorContext);
    try (GBPTree<GenericKey, NativeIndexValue> gbpTree = getTree()) {
        FullScanNonUniqueIndexSampler<GenericKey, NativeIndexValue> sampler = new FullScanNonUniqueIndexSampler<>(gbpTree, layout);
        sampler.sample(cursorContext);
    }
    PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
    assertThat(cursorTracer.pins()).isEqualTo(1);
    assertThat(cursorTracer.unpins()).isEqualTo(1);
    assertThat(cursorTracer.faults()).isEqualTo(1);
}

Example 8 with PageCursorTracer

use of org.neo4j.io.pagecache.tracing.cursor.PageCursorTracer in project neo4j by neo4j.

the class IndexStatisticsStoreTest method tracePageCacheAccessOnCheckpoint.

@Test
void tracePageCacheAccessOnCheckpoint() throws IOException {
    var cacheTracer = new DefaultPageCacheTracer();
    var store = openStore(cacheTracer, "checkpoint");
    try (var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAccessOnCheckpoint"))) {
        for (int i = 0; i < 100; i++) {
            store.replaceStats(i, new IndexSample());
        }
        store.checkpoint(cursorContext);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        assertThat(cursorTracer.pins()).isEqualTo(43);
        assertThat(cursorTracer.unpins()).isEqualTo(43);
        assertThat(cursorTracer.hits()).isEqualTo(35);
        assertThat(cursorTracer.faults()).isEqualTo(8);
    }
}

Example 9 with PageCursorTracer

use of org.neo4j.io.pagecache.tracing.cursor.PageCursorTracer in project neo4j by neo4j.

the class IndexStatisticsStoreTest method tracePageCacheAccessOnConsistencyCheck.

@Test
void tracePageCacheAccessOnConsistencyCheck() throws IOException {
    var cacheTracer = new DefaultPageCacheTracer();
    var store = openStore(cacheTracer, "consistencyCheck");
    try (var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAccessOnConsistencyCheck"))) {
        for (int i = 0; i < 100; i++) {
            store.replaceStats(i, new IndexSample());
        }
        store.checkpoint(CursorContext.NULL);
        store.consistencyCheck(noopReporterFactory(), cursorContext);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        assertThat(cursorTracer.pins()).isEqualTo(16);
        assertThat(cursorTracer.unpins()).isEqualTo(16);
        assertThat(cursorTracer.hits()).isEqualTo(16);
    }
}

Example 10 with PageCursorTracer

use of org.neo4j.io.pagecache.tracing.cursor.PageCursorTracer in project neo4j by neo4j.

the class ReadOnlyLogVersionRepositoryIT method tracePageCacheAccessOnReadOnlyLogRepoConstruction.

@Test
void tracePageCacheAccessOnReadOnlyLogRepoConstruction() throws IOException {
    var pageCacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(pageCacheTracer.createPageCursorTracer("tracePageCacheAccessOnReadOnlyLogRepoConstruction"));
    new ReadOnlyLogVersionRepository(pageCache, databaseLayout, cursorContext);
    PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
    assertThat(cursorTracer.pins()).isEqualTo(2);
    assertThat(cursorTracer.unpins()).isEqualTo(2);
    assertThat(cursorTracer.hits()).isEqualTo(2);
}