For unbounded caches (such as HardRef cache) it is initial capacity of underlying table (HashMap).
Default cache size is 32768. @param cacheSize new cache size @return this builder
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maker = DBMaker.newMemoryDB(); else { if (overwrite) wipe(file); maker = DBMaker.newFileDB(new File(file)); maker = maker.cacheSize(cache_size); if (async) { maker = maker.asyncWriteEnable(); maker = maker.asyncWriteFlushDelay(10000); } if (mmap)