static size_t s_nDelThreadCount; // delete thread count
static size_t s_nExtractThreadCount; // extract thread count
static size_t s_nMaxLoadFactor; // maximum load factor
static size_t s_nDelThreadCount; // delete thread count
static size_t s_nExtractThreadCount; // extract thread count
static size_t s_nMaxLoadFactor; // maximum load factor