struct value_dist {

uint64_t count;

uint32_t max_len;

};

struct key_dist {

uint64_t count;

uint32_t max_len;

std::map<int, struct value_dist> val_map; ///< slab id to count, max length of value and key

};

std::map<std::string, std::map<int, struct key_dist> > key_hist;

std::map<int, uint64_t> value_hist;

int get_key_slab(size_t sz);

std::string get_key_slab_to_range(int slab);

int get_value_slab(size_t sz);

std::string get_value_slab_to_range(int slab);

void update_hist_entry(std::map<std::string, std::map<int, struct key_dist> >& key_hist,

const std::string& prefix, size_t key_size, size_t value_size);

void dump(ceph::Formatter* f);