Examples of com.sleepycat.je.utilint.StatGroup

com.sleepycat.je.utilint.StatGroup
The Stats infrastructure provides context for JE statistics. Each statistic has these attributes: - metadata - specifically, a name and description - each statistic is associated with a parent stat group, which itself has a name and description. - support for the StatsConfig.clear semantics - a way to print statistics in a user friendly way. To create a statistic variable, instantiate one of the concrete subclasses of Stat. Each concrete subclass should hold the methods that are needed to best set and display the value. For example, instead of using LongStat to hold a timestamp or LSN value, use TimestampStat or LSNStat. A Stat instance needs to specify a StatDefinition. There may be multiple Stat variables in different components that share a StatDefinition. They are differentiated when displayed by their parent StatGroup. Each Stat instance is associated with a StatGroup, which holds the collection of stats that belong to a given component. Each member of the StatGroup has a unique StatDefinition. StatGroups can be combined, in order to accumulate values. For example, the LockManager may have multiple lock tables. Each lock table keeps its own latch statistics. When LockStats are generated, the StatsGroup for each latch is collected and rolled up into a single StatGroup, using the addAll(StatGroup) method. The Stats infrastructure is for internal use only. Public API classes like EnvironmentStats, LockStats, etc, contain StatGroups. A call to retrieve stats is implementing by getting a clone of the StatGroups held by the components like the cleaner, the incompressor, the LockManager, etc. The public API classes provide getter methods that reach into the StatGroups to return the specific stat value. To add a statistic, create the Stat variable in the component where it is being used and associate it with a StatGroup. The Stat infrastruture does the rest of the work for plumbing that statistic up to the public API class. Each API class must provide a getter method to access the specific statistic. Currenly, this is done manually.

            lockTableLatches[i] = new Latch("Lock Table " + i);
        }
        this.envImpl = envImpl;
        memoryBudget = envImpl.getMemoryBudget();


        stats = new StatGroup(GROUP_NAME, GROUP_DESC);
        nRequests = new LongStat(stats, LOCK_REQUESTS);
        nWaits = new LongStat(stats, LOCK_WAITS);


        /* Initialize mutable properties and register for notifications. */
        envConfigUpdate(configMgr, null);

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     * Statistics
     */
    public LockStats lockStat(StatsConfig config)
        throws DatabaseException {


        StatGroup latchStats = new StatGroup("Locktable latches", 
                                             "Shows lock table contention");
        for (int i = 0; i < nLockTables; i++) {
            latchStats.addAll(lockTableLatches[i].getLatchStats());
        }


        /* Dump info about the lock table. */
        StatGroup tableStats = 
            new StatGroup("Locktable",
                          "The types of locks held in the lock table");
        if (!config.getFast()) {
            dumpLockTable(tableStats, false /*clear*/);
        }
        
        return new LockStats(stats.cloneGroup(config.getClear()),
                             latchStats.cloneGroup(config.getClear()),
                             tableStats.cloneGroup(config.getClear()));
    }

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                             latchStats.cloneGroup(config.getClear()),
                             tableStats.cloneGroup(config.getClear()));
    }


    public StatGroup loadStats(StatsConfig config) {
        StatGroup copyStats = stats.cloneGroup(config.getClear());


        StatGroup latchStats = new StatGroup("Locktable latches", 
                                             "Shows lock table contention");
        for (int i = 0; i < nLockTables; i++) {
            latchStats.addAll(lockTableLatches[i].getLatchStats());
            if (config.getClear()) {
                lockTableLatches[i].clear();
            }
        }
        /* Add all the latch stats to the whole stats group. */
        copyStats.addAll(latchStats);


        StatGroup tableStats = 
            new StatGroup("Locktable",
                          "The types of locks held in the lock table");
        if (!config.getFast()) {
            dumpLockTable(tableStats, config.getClear());
        }
        /* Add all the lock table stats to the whole stats group. */

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    /**
     * Do the real work of dumpLockTableInternal.
     */
    void dumpLockTableInternal(StatGroup tableStats, int i, boolean clear) {
        StatGroup oneTable = new StatGroup("Single lock table",
                                           "Temporary stat group");


        IntStat totalLocks = new IntStat(oneTable, LOCK_TOTAL);
        IntStat waiters = new IntStat(oneTable, LOCK_WAITERS);
        IntStat owners = new IntStat(oneTable, LOCK_OWNERS);

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    /**
     * stats
     */
    @Override
    public StatGroup collectStats() {
        StatGroup stats =
            new StatGroup("Transaction lock counts" ,
                          "Read and write locks held by transaction " + id);


        IntStat statReadLocks = new IntStat(stats, LOCK_READ_LOCKS);
        IntStat statWriteLocks = new IntStat(stats, LOCK_WRITE_LOCKS);
        IntStat statTotalLocks = new IntStat(stats, LOCK_TOTAL);

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        lastUsedLocalTxnId = new AtomicLong(0);
        lastUsedReplicatedTxnId = new AtomicLong(FIRST_NEGATIVE_ID);
        nActiveSerializable = new AtomicInteger(0);


        /* Do the stats definition. */
        stats = new StatGroup("Transaction", "Transaction statistics");
        nActive = new IntStat(stats, TXN_ACTIVE);
        numBegins = new LongStat(stats, TXN_BEGINS);
        numCommits = new LongStat(stats, TXN_COMMITS);
        numAborts = new LongStat(stats, TXN_ABORTS);
        numXAPrepares = new LongStat(stats, TXN_XAPREPARES);

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        } else {
            logger = LoggerUtils.getLoggerFormatterNeeded(getClass());
        }
        formatter = new ReplicationFormatter(nameIdPair);


        statistics  = new StatGroup(ProposerStatDefinition.GROUP_NAME,
                                    ProposerStatDefinition.GROUP_DESC);
        phase1NoQuorum = new IntStat(statistics, PHASE1_NO_QUORUM);
        phase1HigherProposal = new IntStat(statistics, PHASE1_HIGHER_PROPOSAL);
        phase2NoQuorum = new IntStat(statistics, PHASE2_NO_QUORUM);
        phase2HigherProposal = new IntStat(statistics, PHASE2_HIGHER_PROPOSAL);

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    /**
     * Load stats.
     */
    public StatGroup loadStats(StatsConfig config) {
        StatGroup stats = new StatGroup(GROUP_NAME, GROUP_DESC);
        new LongStat(stats, CKPT_LAST_CKPTID, checkpointId);
        new LongStat(stats, CKPT_CHECKPOINTS, nCheckpoints);
        new LSNStat(stats, CKPT_LAST_CKPT_START, lastCheckpointStart);
        new LSNStat(stats, CKPT_LAST_CKPT_END, lastCheckpointEnd);
        new LongStat(stats, CKPT_FULL_IN_FLUSH, flushStats.nFullINFlush);

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    public FeederTxns(RepImpl repImpl) {


        txnMap = new ConcurrentHashMap<Long, TxnInfo>();
        this.repImpl = repImpl;
        statistics = new StatGroup(FeederTxnStatDefinition.GROUP_NAME,
                                   FeederTxnStatDefinition.GROUP_DESC);
        txnsAcked = new AtomicLongStat(statistics, TXNS_ACKED);
        txnsNotAcked = new AtomicLongStat(statistics, TXNS_NOT_ACKED);
        ackWaitMs = new AtomicLongStat(statistics, ACK_WAIT_MS);
    }

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            return (int) latch.getCount();
        }
    }


    public StatGroup getStats() {
        StatGroup ret = statistics.cloneGroup(false);


        return ret;
    }

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com.sleepycat.je.BtreeStats

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com.sleepycat.je.dbi.DatabaseImpl$StatsAccumulator

com.sleepycat.je.dbi.EnvironmentImpl

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com.sleepycat.je.dbi.MemoryBudget

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