int blockSize = BlockDirectory.BLOCK_SIZE;
int slabCount = configuration.getInt(BLUR_SHARD_BLOCKCACHE_SLAB_COUNT, -1);
slabCount = getSlabCount(slabCount, numberOfBlocksPerSlab, blockSize, totalNumberOfBytes);
Cache cache;
if (slabCount >= 1) {
BlockCache blockCache;
boolean directAllocation = configuration.getBoolean(BLUR_SHARD_BLOCKCACHE_DIRECT_MEMORY_ALLOCATION, true);
int slabSize = numberOfBlocksPerSlab * blockSize;
LOG.info("Number of slabs of block cache [{0}] with direct memory allocation set to [{1}]", slabCount,
directAllocation);
LOG.info("Block cache target memory usage, slab size of [{0}] will allocate [{1}] slabs and use ~[{2}] bytes",
slabSize, slabCount, ((long) slabCount * (long) slabSize));
try {
long totalMemory = (long) slabCount * (long) numberOfBlocksPerSlab * (long) blockSize;
blockCache = new BlockCache(directAllocation, totalMemory, slabSize);
} catch (OutOfMemoryError e) {
if ("Direct buffer memory".equals(e.getMessage())) {
System.err
.println("The max direct memory is too low. Either increase by setting (-XX:MaxDirectMemorySize=<size>g -XX:+UseLargePages) or disable direct allocation by (blur.shard.blockcache.direct.memory.allocation=false) in blur-site.properties");
System.exit(1);