Package org.eclipse.jgit.internal.storage.dfs

Class DfsBlockCacheConfig

    • Field Detail

      • KB

        public static final int KB
        1024 (number of bytes in one kibibyte/kilobyte)
        See Also:
        Constant Field Values

      • MB

        public static final int MB
        1024 KB (number of bytes in one mebibyte/megabyte)
        See Also:
        Constant Field Values

      • DEFAULT_CACHE_HOT_MAX

        public static final int DEFAULT_CACHE_HOT_MAX
        Default number of max cache hits.
        See Also:
        Constant Field Values

    • Constructor Detail

      • DfsBlockCacheConfig

        public DfsBlockCacheConfig()
        Create a default configuration.

    • Method Detail

      • getBlockLimit

        public long getBlockLimit()
        Get maximum number bytes of heap memory to dedicate to caching pack file data.
        Returns:
        maximum number bytes of heap memory to dedicate to caching pack file data. Default is 32 MB.

      • setBlockLimit

        public DfsBlockCacheConfig setBlockLimit​(long newLimit)
        Set maximum number bytes of heap memory to dedicate to caching pack file data.

        It is strongly recommended to set the block limit to be an integer multiple of the block size. This constraint is not enforced by this method (since it may be called before setBlockSize(int)), but it is enforced by fromConfig(Config).

        Parameters:
        newLimit - maximum number bytes of heap memory to dedicate to caching pack file data; must be positive.
        Returns:
        this

      • getBlockSize

        public int getBlockSize()
        Get size in bytes of a single window mapped or read in from the pack file.
        Returns:
        size in bytes of a single window mapped or read in from the pack file. Default is 64 KB.

      • setBlockSize

        public DfsBlockCacheConfig setBlockSize​(int newSize)
        Set size in bytes of a single window read in from the pack file.
        Parameters:
        newSize - size in bytes of a single window read in from the pack file. The value must be a power of 2.
        Returns:
        this

      • getConcurrencyLevel

        public int getConcurrencyLevel()
        Get the estimated number of threads concurrently accessing the cache.
        Returns:
        the estimated number of threads concurrently accessing the cache. Default is 32.

      • setConcurrencyLevel

        public DfsBlockCacheConfig setConcurrencyLevel​(int newConcurrencyLevel)
        Set the estimated number of threads concurrently accessing the cache.
        Parameters:
        newConcurrencyLevel - the estimated number of threads concurrently accessing the cache.
        Returns:
        this

      • getStreamRatio

        public double getStreamRatio()
        Get highest percentage of getBlockLimit() a single pack can occupy while being copied by the pack reuse strategy.
        Returns:
        highest percentage of getBlockLimit() a single pack can occupy while being copied by the pack reuse strategy. Default is 0.30, or 30%.

      • setStreamRatio

        public DfsBlockCacheConfig setStreamRatio​(double ratio)
        Set percentage of cache to occupy with a copied pack.
        Parameters:
        ratio - percentage of cache to occupy with a copied pack.
        Returns:
        this

      • getRefLockWaitTimeConsumer

        public Consumer<Long> getRefLockWaitTimeConsumer()
        Get the consumer of the object reference lock wait time in milliseconds.
        Returns:
        consumer of wait time in milliseconds.

      • setRefLockWaitTimeConsumer

        public DfsBlockCacheConfig setRefLockWaitTimeConsumer​(Consumer<Long> c)
        Set the consumer for lock wait time.
        Parameters:
        c - consumer of wait time in milliseconds.
        Returns:
        this

      • getCacheHotMap

        public Map<PackExt,​Integer> getCacheHotMap()
        Get the map of hot count per pack extension for DfsBlockCache.
        Returns:
        map of hot count per pack extension for DfsBlockCache.

      • setCacheHotMap

        public DfsBlockCacheConfig setCacheHotMap​(Map<PackExt,​Integer> cacheHotMap)
        Set the map of hot count per pack extension for DfsBlockCache.
        Parameters:
        cacheHotMap - map of hot count per pack extension for DfsBlockCache.
        Returns:
        this

      • fromConfig

        public DfsBlockCacheConfig fromConfig​(Config rc)
        Update properties by setting fields from the configuration.

        If a property is not defined in the configuration, then it is left unmodified.

        Enforces certain constraints on the combination of settings in the config, for example that the block limit is a multiple of the block size.

        Parameters:
        rc - configuration to read properties from.
        Returns:
        this