Examples with CacheMetrics org.apache.cassandra.metrics.CacheMetrics used on opensource projects

Example 1 with CacheMetrics

use of org.apache.cassandra.metrics.CacheMetrics in project cassandra by apache.

the class KeyCacheCqlTest method test2iKeyCachePathsSaveKeysForDroppedTable.

private void test2iKeyCachePathsSaveKeysForDroppedTable() throws Throwable {
    String table = createTable("CREATE TABLE %s (" + commonColumnsDef + "PRIMARY KEY ((part_key_a, part_key_b),clust_key_a,clust_key_b,clust_key_c))");
    createIndex("CREATE INDEX some_index ON %s (col_int)");
    insertData(table, "some_index", true);
    clearCache();
    CacheMetrics metrics = CacheService.instance.keyCache.getMetrics();
    for (int i = 0; i < 10; i++) {
        UntypedResultSet result = execute("SELECT part_key_a FROM %s WHERE col_int = ?", i);
        assertEquals(500, result.size());
    }
    long hits = metrics.hits.getCount();
    long requests = metrics.requests.getCount();
    assertEquals(0, hits);
    assertEquals(210, requests);
    for (int i = 0; i < 10; i++) {
        UntypedResultSet result = execute("SELECT part_key_a FROM %s WHERE col_int = ?", i);
        // 100 part-keys * 50 clust-keys
        // indexed on part-key % 10 = 10 index partitions
        // (50 clust-keys  *  100-part-keys  /  10 possible index-values) = 500
        assertEquals(500, result.size());
    }
    metrics = CacheService.instance.keyCache.getMetrics();
    hits = metrics.hits.getCount();
    requests = metrics.requests.getCount();
    assertEquals(200, hits);
    assertEquals(420, requests);
    dropTable("DROP TABLE %s");
    CacheService.instance.keyCache.submitWrite(Integer.MAX_VALUE).get();
    CacheService.instance.keyCache.clear();
    Assert.assertEquals(0, CacheService.instance.keyCache.size());
    // then load saved
    CacheService.instance.keyCache.loadSaved();
    Iterator<KeyCacheKey> iter = CacheService.instance.keyCache.keyIterator();
    while (iter.hasNext()) {
        KeyCacheKey key = iter.next();
        TableMetadataRef tableMetadataRef = Schema.instance.getTableMetadataRef(key.tableId);
        Assert.assertFalse(tableMetadataRef.keyspace.equals("KEYSPACE_PER_TEST"));
        Assert.assertFalse(tableMetadataRef.name.startsWith(table));
    }
}

Example 2 with CacheMetrics

use of org.apache.cassandra.metrics.CacheMetrics in project cassandra by apache.

the class KeyCacheCqlTest method testKeyCacheClustered.

private void testKeyCacheClustered() throws Throwable {
    String table = createTable("CREATE TABLE %s (" + commonColumnsDef + "PRIMARY KEY ((part_key_a, part_key_b),clust_key_a,clust_key_b,clust_key_c))");
    insertData(table, null, true);
    clearCache();
    // 10 queries, each 50 result rows
    for (int i = 0; i < 10; i++) {
        assertEquals(50, execute("SELECT col_text FROM %s WHERE part_key_a = ? AND part_key_b = ?", i, Integer.toOctalString(i)).size());
    }
    CacheMetrics metrics = CacheService.instance.keyCache.getMetrics();
    long hits = metrics.hits.getCount();
    long requests = metrics.requests.getCount();
    assertEquals(0, hits);
    assertEquals(10, requests);
    // 10 queries, each 50 result rows
    for (int i = 0; i < 10; i++) {
        assertEquals(50, execute("SELECT col_text FROM %s WHERE part_key_a = ? AND part_key_b = ?", i, Integer.toOctalString(i)).size());
    }
    metrics = CacheService.instance.keyCache.getMetrics();
    hits = metrics.hits.getCount();
    requests = metrics.requests.getCount();
    assertEquals(10, hits);
    assertEquals(10 + 10, requests);
    // 100 queries - must get a hit in key-cache
    for (int i = 0; i < 10; i++) {
        for (int c = 0; c < 10; c++) {
            assertRows(execute("SELECT col_text, col_long FROM %s WHERE part_key_a = ? AND part_key_b = ? and clust_key_a = ?", i, Integer.toOctalString(i), c), new Object[] { String.valueOf(i) + '-' + String.valueOf(c), (long) c });
        }
    }
    metrics = CacheService.instance.keyCache.getMetrics();
    hits = metrics.hits.getCount();
    requests = metrics.requests.getCount();
    assertEquals(10 + 100, hits);
    assertEquals(20 + 100, requests);
    // 5000 queries - first 10 partitions already in key cache
    for (int i = 0; i < 100; i++) {
        for (int c = 0; c < 50; c++) {
            assertRows(execute("SELECT col_text, col_long FROM %s WHERE part_key_a = ? AND part_key_b = ? and clust_key_a = ?", i, Integer.toOctalString(i), c), new Object[] { String.valueOf(i) + '-' + String.valueOf(c), (long) c });
        }
    }
    hits = metrics.hits.getCount();
    requests = metrics.requests.getCount();
    assertEquals(110 + 4910, hits);
    assertEquals(120 + 5500, requests);
}

Example 3 with CacheMetrics

use of org.apache.cassandra.metrics.CacheMetrics in project cassandra by apache.

the class LargePartitionsTest method keyCacheMetrics.

private static void keyCacheMetrics(String title) {
    CacheMetrics metrics = CacheService.instance.keyCache.getMetrics();
    System.out.println("Key cache metrics " + title + ": capacity:" + metrics.capacity.getValue() + " size:" + metrics.size.getValue() + " entries:" + metrics.entries.getValue() + " hit-rate:" + metrics.hitRate.getValue() + " one-min-rate:" + metrics.oneMinuteHitRate.getValue());
}

Example 4 with CacheMetrics

use of org.apache.cassandra.metrics.CacheMetrics in project cassandra by apache.

the class InstrumentingCache method clear.

public void clear() {
    map.clear();
    metrics = new CacheMetrics(type, map);
}

Example 5 with CacheMetrics

use of org.apache.cassandra.metrics.CacheMetrics in project cassandra by apache.

the class KeyCacheCqlTest method clearCache.

private static void clearCache() {
    CassandraMetricsRegistry.Metrics.getNames().forEach(CassandraMetricsRegistry.Metrics::remove);
    CacheService.instance.keyCache.clear();
    CacheMetrics metrics = CacheService.instance.keyCache.getMetrics();
    Assert.assertEquals(0, metrics.entries.getValue().intValue());
    Assert.assertEquals(0L, metrics.hits.getCount());
    Assert.assertEquals(0L, metrics.requests.getCount());
    Assert.assertEquals(0L, metrics.size.getValue().longValue());
}