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

Example 41 with PageCursorTracer

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

the class NeoStoresIT method tracePageCacheAccessOnGetRecord.

@Test
void tracePageCacheAccessOnGetRecord() {
    var storageEngine = db.getDependencyResolver().resolveDependency(RecordStorageEngine.class);
    var neoStores = storageEngine.testAccessNeoStores();
    var nodeStore = neoStores.getNodeStore();
    long nodeId;
    try (Transaction transaction = db.beginTx()) {
        var node = transaction.createNode();
        node.setProperty("a", "b");
        nodeId = node.getId();
        transaction.commit();
    }
    var cursorContext = new CursorContext(new DefaultPageCacheTracer().createPageCursorTracer("tracePageCacheAccessOnGetRecord"));
    nodeStore.getRecord(nodeId, new NodeRecord(nodeId), RecordLoad.NORMAL, cursorContext);
    PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
    assertEquals(1, cursorTracer.hits());
    assertEquals(1, cursorTracer.pins());
    assertEquals(1, cursorTracer.unpins());
}

Example 42 with PageCursorTracer

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

the class FullScanNonUniqueIndexSamplerTest method assertZeroCursor.

private static void assertZeroCursor(CursorContext cursorContext) {
    PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
    assertThat(cursorTracer.pins()).isZero();
    assertThat(cursorTracer.unpins()).isZero();
    assertThat(cursorTracer.faults()).isZero();
}

Example 43 with PageCursorTracer

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

the class MetaDataStoreTest method tracePageCacheAccessOnSetRecord.

@Test
void tracePageCacheAccessOnSetRecord() throws IOException {
    var cacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAccessOnSetRecord"));
    try (var metaDataStore = newMetaDataStore()) {
        MetaDataStore.setRecord(pageCache, metaDataStore.getStorageFile(), MetaDataStore.Position.RANDOM_NUMBER, 3, databaseLayout.getDatabaseName(), cursorContext);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        assertThat(cursorTracer.pins()).isOne();
        assertThat(cursorTracer.unpins()).isOne();
        assertThat(cursorTracer.hits()).isOne();
    }
}

Example 44 with PageCursorTracer

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

the class MetaDataStoreTest method tracePageCacheAssessOnSetStoreId.

@Test
void tracePageCacheAssessOnSetStoreId() throws IOException {
    var cacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAssessOnSetStoreId"));
    try (var metaDataStore = newMetaDataStore()) {
        var storeId = new StoreId(1, 2, 3, 4, 5);
        MetaDataStore.setStoreId(pageCache, metaDataStore.getStorageFile(), storeId, 6, 7, databaseLayout.getDatabaseName(), cursorContext);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        assertThat(cursorTracer.pins()).isEqualTo(7);
        assertThat(cursorTracer.unpins()).isEqualTo(7);
        assertThat(cursorTracer.hits()).isEqualTo(7);
    }
}

Example 45 with PageCursorTracer

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

the class MetaDataStoreTest method tracePageCacheAssessOnGetStoreId.

@Test
void tracePageCacheAssessOnGetStoreId() throws IOException {
    var cacheTracer = new DefaultPageCacheTracer();
    var cursorContext = new CursorContext(cacheTracer.createPageCursorTracer("tracePageCacheAssessOnGetStoreId"));
    try (var metaDataStore = newMetaDataStore()) {
        MetaDataStore.getStoreId(pageCache, metaDataStore.getStorageFile(), databaseLayout.getDatabaseName(), cursorContext);
        PageCursorTracer cursorTracer = cursorContext.getCursorTracer();
        assertThat(cursorTracer.pins()).isEqualTo(5);
        assertThat(cursorTracer.unpins()).isEqualTo(5);
        assertThat(cursorTracer.hits()).isEqualTo(5);
    }
}