public void TestLockStats()
{
testName = "TestLockStats";
SetUpTest(true);
// Configure locking subsystem.
LockingConfig lkConfig = new LockingConfig();
lkConfig.MaxLockers = 60;
lkConfig.MaxLocks = 50;
lkConfig.MaxObjects = 70;
lkConfig.Partitions = 20;
lkConfig.DeadlockResolution = DeadlockPolicy.DEFAULT;
// Configure and open environment.
DatabaseEnvironmentConfig envConfig =
new DatabaseEnvironmentConfig();
envConfig.Create = true;
envConfig.FreeThreaded = true;
envConfig.LockSystemCfg = lkConfig;
envConfig.LockTimeout = 1000;
envConfig.MPoolSystemCfg = new MPoolConfig();
envConfig.MPoolSystemCfg.CacheSize = new CacheInfo(0, 104800, 1);
envConfig.NoLocking = false;
envConfig.TxnTimeout = 2000;
envConfig.UseLocking = true;
envConfig.UseMPool = true;
envConfig.UseTxns = true;
DatabaseEnvironment env =
DatabaseEnvironment.Open(testHome, envConfig);
// Get and confirm locking subsystem statistics.
LockStats stats = env.LockingSystemStats();
env.PrintLockingSystemStats(true, true);
Assert.AreEqual(0, stats.AllocatedLockers);
Assert.AreNotEqual(0, stats.AllocatedLocks);
Assert.AreNotEqual(0, stats.AllocatedObjects);
Assert.AreEqual(0, stats.InitLockers);
Assert.AreNotEqual(0, stats.InitLocks);
Assert.AreNotEqual(0, stats.InitObjects);
Assert.AreEqual(0, stats.LastAllocatedLockerID);
Assert.AreEqual(0, stats.LockConflictsNoWait);
Assert.AreEqual(0, stats.LockConflictsWait);
Assert.AreEqual(0, stats.LockDeadlocks);
Assert.AreEqual(0, stats.LockDowngrades);
Assert.AreEqual(0, stats.LockerNoWait);
Assert.AreEqual(0, stats.Lockers);
Assert.AreEqual(0, stats.LockerWait);
Assert.AreEqual(9, stats.LockModes);
Assert.AreEqual(0, stats.LockPuts);
Assert.AreEqual(0, stats.LockRequests);
Assert.AreEqual(0, stats.Locks);
Assert.AreEqual(0, stats.LockSteals);
Assert.AreEqual(1000, stats.LockTimeoutLength);
Assert.AreEqual(0, stats.LockTimeouts);
Assert.AreEqual(0, stats.LockUpgrades);
Assert.AreEqual(0, stats.MaxBucketLength);
Assert.AreEqual(0, stats.MaxLockers);
Assert.AreEqual(60, stats.MaxLockersInTable);
Assert.AreEqual(0, stats.MaxLocks);
Assert.AreEqual(0, stats.MaxLocksInBucket);
Assert.AreEqual(50, stats.MaxLocksInTable);
Assert.AreEqual(0, stats.MaxLockSteals);
Assert.AreEqual(0, stats.MaxObjects);
Assert.AreEqual(0, stats.MaxObjectsInBucket);
Assert.AreEqual(70, stats.MaxObjectsInTable);
Assert.AreEqual(0, stats.MaxObjectSteals);
Assert.AreEqual(0, stats.MaxPartitionLockNoWait);
Assert.AreEqual(0, stats.MaxPartitionLockWait);
Assert.AreNotEqual(0, stats.MaxUnusedID);
Assert.AreEqual(20, stats.nPartitions);
Assert.AreEqual(0, stats.ObjectNoWait);
Assert.AreEqual(0, stats.Objects);
Assert.AreEqual(0, stats.ObjectSteals);
Assert.AreEqual(0, stats.ObjectWait);
Assert.LessOrEqual(0, stats.PartitionLockNoWait);
Assert.AreEqual(0, stats.PartitionLockWait);
Assert.Less(0, stats.RegionNoWait);
Assert.AreNotEqual(0, stats.RegionSize);
Assert.AreEqual(0, stats.RegionWait);
Assert.AreNotEqual(0, stats.TableSize);
Assert.AreEqual(2000, stats.TxnTimeoutLength);
Assert.AreEqual(0, stats.TxnTimeouts);
env.PrintLockingSystemStats();
Transaction txn = env.BeginTransaction();
BTreeDatabaseConfig dbConfig = new BTreeDatabaseConfig();
dbConfig.Creation = CreatePolicy.IF_NEEDED;
dbConfig.Env = env;
dbConfig.FreeThreaded = true;
BTreeDatabase db = BTreeDatabase.Open(
testName + ".db", dbConfig, txn);
txn.Commit();
testLockStatsEnv = env;
testLockStatsDb = db;
// Use some locks, to ensure the stats work when populated.
txn = testLockStatsEnv.BeginTransaction();
for (int i = 0; i < 500; i++)
{
testLockStatsDb.Put(
new DatabaseEntry(BitConverter.GetBytes(i)),
new DatabaseEntry(ASCIIEncoding.ASCII.GetBytes(
Configuration.RandomString(i))), txn);
testLockStatsDb.Sync();
}
txn.Commit();
env.PrintLockingSystemStats();
stats = env.LockingSystemStats();
Assert.Less(0, stats.LastAllocatedLockerID);
Assert.Less(0, stats.LockDowngrades);
Assert.LessOrEqual(0, stats.LockerNoWait);
Assert.Less(0, stats.Lockers);
Assert.LessOrEqual(0, stats.LockerWait);
Assert.Less(0, stats.LockPuts);
Assert.Less(0, stats.LockRequests);
Assert.Less(0, stats.Locks);
Assert.LessOrEqual(0, stats.LockSteals);
Assert.LessOrEqual(0, stats.LockTimeouts);
Assert.LessOrEqual(0, stats.LockUpgrades);
Assert.Less(0, stats.MaxBucketLength);
Assert.Less(0, stats.MaxLockers);
Assert.Less(0, stats.MaxLocks);
Assert.Less(0, stats.MaxLocksInBucket);
Assert.LessOrEqual(0, stats.MaxLockSteals);
Assert.Less(0, stats.MaxObjects);
Assert.Less(0, stats.MaxObjectsInBucket);
Assert.LessOrEqual(0, stats.MaxObjectSteals);
Assert.LessOrEqual(0, stats.MaxPartitionLockNoWait);
Assert.LessOrEqual(0, stats.MaxPartitionLockWait);
Assert.Less(0, stats.MaxUnusedID);
Assert.LessOrEqual(0, stats.ObjectNoWait);
Assert.Less(0, stats.Objects);
Assert.LessOrEqual(0, stats.ObjectSteals);
Assert.LessOrEqual(0, stats.ObjectWait);
Assert.Less(0, stats.PartitionLockNoWait);
Assert.LessOrEqual(0, stats.PartitionLockWait);
Assert.Less(0, stats.RegionNoWait);
Assert.LessOrEqual(0, stats.RegionWait);
Assert.LessOrEqual(0, stats.TxnTimeouts);
// Force a deadlock to ensure the stats work.
txn = testLockStatsEnv.BeginTransaction();
testLockStatsDb.Put(new DatabaseEntry(BitConverter.GetBytes(10)),
new DatabaseEntry(ASCIIEncoding.ASCII.GetBytes(
Configuration.RandomString(200))), txn);
Thread thread1 = new Thread(GenerateDeadlock);
thread1.Start();
while (DeadlockDidPut == 0)
Thread.Sleep(10);
try
{
testLockStatsDb.Get(new DatabaseEntry(
BitConverter.GetBytes(100)), txn);
}
catch (DeadlockException) { }
// Abort unconditionally - we don't care about the transaction
txn.Abort();
thread1.Join();
stats = env.LockingSystemStats();
Assert.Less(0, stats.LockConflictsNoWait);
Assert.LessOrEqual(0, stats.LockConflictsWait);
db.Close();
env.Close();
}