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.

    }


    /* Get the protocol stats for this FeederManager. */
    public StatGroup getProtocolStats(StatsConfig config) {
        /* Aggregate stats that have not yet been aggregated. */
        StatGroup protocolStats =
            new StatGroup(BinaryProtocolStatDefinition.GROUP_NAME,
                          BinaryProtocolStatDefinition.GROUP_DESC);
        synchronized (activeFeeders) {
            for (Feeder feeder : activeFeeders.values()) {
                protocolStats.addAll(feeder.getProtocolStats(config));
            }
        }


        return protocolStats;
    }

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        throws DatabaseException {


        this.envImpl = envImpl;


        /* Do the stats definitions. */
        stats = new StatGroup(GROUP_NAME, GROUP_DESC);
        nEvictPasses = new LongStat(stats, EVICTOR_EVICT_PASSES);
        nNodesScanned = new LongStat(stats, EVICTOR_NODES_SCANNED);
        nNodesEvicted = new LongStat(stats, EVICTOR_NODES_EVICTED);
        nRootNodesEvicted = new LongStat(stats, EVICTOR_ROOT_NODES_EVICTED);
        nBINsStripped = new LongStat(stats, EVICTOR_BINS_STRIPPED);

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    /**
     * Load stats.
     */
    public StatGroup loadStats(StatsConfig config) {


        StatGroup copy = stats.cloneGroup(config.getClear());


        /*
         * These stats are not cleared. They represent the current state of
         * the cache.
         */
        new LongStat(copy, CACHED_IN_SPARSE_TARGET, nINSparseTarget.get());
        new LongStat(copy, CACHED_IN_NO_TARGET, nINNoTarget.get());
        new LongStat(copy, CACHED_IN_COMPACT_KEY, nINCompactKey.get());
        copy.addAll(selector.loadStats(config));
        copy.addAll(arbiter.loadStats(config));


        /* 
         * The number and average size of batches, by type of caller, is
         * calculated each time we collect stats.
         */

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        DbConfigManager configManager = envImpl.getConfigManager();
        nodesPerScan = configManager.getInt
            (EnvironmentParams.EVICTOR_NODES_PER_SCAN);
        evictByLruOnly = configManager.getBoolean
            (EnvironmentParams.EVICTOR_LRU_ONLY);
        stats = new StatGroup(GROUP_NAME, GROUP_DESC);
        nNodesSelected = new LongStat(stats, EVICTOR_NODES_SELECTED);
    }

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     * Called whenever INs are added to, or removed from, the INList.
     */
    public abstract void noteINListChange(int nINs);


    public StatGroup loadStats(StatsConfig config) {
        StatGroup copy = stats.cloneGroup(config.getClear());
        copy.addAll(getINListStats(config));
        return copy;
    }

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                            @SuppressWarnings("unused")
                            Message message =
                                getProtocol().read(getReplicaFeederChannel());
                            if (statsInterval > 0 &&
                                (opCount % statsInterval) == 0) {
                                StatGroup stats = getProtocol().
                                    getStats(StatsConfig.DEFAULT);
                                long bytesRead = 
                                    stats.getLong(N_BYTES_READ);
                                long messagesRead =
                                    stats.getLong(N_MESSAGES_READ);
                                long elapsedTime =
                                    System.currentTimeMillis() - ctime;
                                long bytesPerMilliSecond =
                                    bytesRead / elapsedTime;
                                System.out.println

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            envState = DbEnvState.INIT;
            mapTreeRootLatch = new Latch("MapTreeRoot");
            exceptionListenerUsers = new HashSet<ExceptionListenerUser>();


            /* Do the stats definition. */
            stats = new StatGroup(ENV_GROUP_NAME, ENV_GROUP_DESC);
            relatchesRequired =
                new LongStat(stats, ENVIMPL_RELATCHES_REQUIRED);


            /* Set up configuration parameters */
            configManager = initConfigManager(envConfig, repConfigProxy);

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    public Latch(String name) {
        lock = new JEReentrantLock(EnvironmentImpl.getFairLatches());
        this.name = name;


        stats = new StatGroup(LatchStatDefinition.GROUP_NAME, 
                              LatchStatDefinition.GROUP_DESC);
        nAcquiresNoWaiters = new IntStat(stats, LATCH_NO_WAITERS);
        nAcquiresSelfOwned = new IntStat(stats, LATCH_SELF_OWNED);
        nAcquiresWithContention = new IntStat(stats, LATCH_CONTENTION);
        nAcquiresNoWaitSuccessful = new IntStat(stats, LATCH_NOWAIT_SUCCESS);

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     */
    @Override
    public StatGroup collectStats()
        throws DatabaseException {


        StatGroup stats = 
            new StatGroup("Locker lock counts" ,
                          "Read and write locks held by this locker");


        IntStat nReadLocks = new IntStat(stats, LOCK_READ_LOCKS);
        IntStat nWriteLocks = new IntStat(stats, LOCK_WRITE_LOCKS);

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        rootLatch = new SharedLatch("RootLatch");
        this.root = null;
        this.database = database;


        /* Do the stats definitions. */
        stats = new StatGroup(GROUP_NAME, GROUP_DESC);
        relatchesRequired = new LongStat(stats, BTREE_RELATCHES_REQUIRED);
        rootSplits = new IntStat(stats, BTREE_ROOT_SPLITS);
    }

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Related Classes of com.sleepycat.je.utilint.StatGroup

com.sleepycat.je.BtreeStats

com.sleepycat.je.cleaner.Cleaner

com.sleepycat.je.cleaner.FileSelector

com.sleepycat.je.dbi.DatabaseImpl$StatsAccumulator

com.sleepycat.je.dbi.EnvironmentImpl

com.sleepycat.je.dbi.INList

com.sleepycat.je.dbi.MemoryBudget

com.sleepycat.je.EnvironmentStats

com.sleepycat.je.evictor.Arbiter

com.sleepycat.je.evictor.Evictor

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